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Derating: Outdoor Temperatures for Various U.S. Cities - Table

Design Temperatures For Various U.S. Cities

The following table indicates the 2% design temperature (averaged for June-August) for various cities; and the various temperatures inside conduit on rooftops exposed to direct sunlight.

The first column represents the ASHRAE 2% design temperature1. The second through fifth column is the resultant ambient temperature inside the conduit - unloaded2. It is the temperature the wire is subjected to.

The 6th column is the maximum dry-bulb temperature recorded for that city, based on 30 years of weather data.

Click on the state links below to see the outdoor temperatures for cities in that state.

Alabama Indiana Nebraska South Carolina
Alaska Iowa Nevada South Dakota
Arizona Kansas New Hampshire Tennessee
Arkansas Kentuky New Jersey Texas
California Louisiana New Mexico Utah
Colorado Maine New York Vermont
Connecticut Maryland North Carolina Virginia
Delaware Massachusetts North Dakota Washington
Florida Michigan Ohio West Virginia
Georgia Minnesota Oklahoma Wisconsin
Hawaii Mississippi Oregon Wyoming
Idaho Missouri Pennsylvania
Illinois Montana Rhode Island


Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
1/2" 3 1/2" 12" 36"
AL Alabama
AL ANNISTON METROPOLITAN AP 94 154 134 124 119 106
AL BIRMINGHAM 94 154 134 124 119 107
AL CAIRNS FIELD FORT RUCKER CENTREVILLE WSMO 95 155 135 125 120 105
AL DAUPHIN ISLAND 87 147 127 117 112 96
AL DOTHAN MUNICIPAL AP 95 155 135 125 120 104
AL GADSEN MUNI (AWOS) HUNTSVILLE 93 153 133 123 118 N/A
AL HUNTSVILLE 93 153 133 123 118 106
AL MAXWELL AFB 97 157 137 127 122 105
AL MOBILE 93 153 133 123 118 103
AL MONTGOMERY 95 155 135 125 120 106
AL MUSCLE SHOALS REGIONAL AP 95 155 135 125 120 107
AL TUSCALOOSA MUNICIPAL AP 95 155 135 125 120 105


Temperature inside conduit, in direct sunlight  
2% Design Temp. Distance above roof. Up to: Maximum Temp.
1/2" 3 1/2" 12" 36"
AK Alaska
AK ADAK NAS 57 117 97 87 82 76
AK ANCHORAGE 70 130 110 100 95 83
AK ANCHORAGE MERRILL FIELD 72 132 112 102 97 84
AK ANNETTE 72 132 112 102 97 90
AK BARROW 56 116 96 86 81 78
AK BARTER IS WSO AP 55 115 95 85 80 N/A
AK BETHEL 70 130 110 100 95 86
AK BETTLES 77 137 117 107 102 94
AK BIG DELTA 76 136 116 106 101 93
AK COLD BAY 58 118 98 88 83 76
AK CORDOVA 69 129 109 99 94 89
AK DEADHORSE 65 125 105 95 90 86
AK DILLINGHAM (AMOS) 68 128 108 98 93 84
AK EIELSON AFB 80 140 120 110 105 97
AK ELMENDORF AFB 72 132 112 102 97 85
AK FAIRBANKS 79 139 119 109 104 96
AK FIVE FINGER ISLAND 64 124 104 94 89 77
AK FORT YUKON 78 138 118 108 103 96
AK FT RICHARDSON/BRYANT APT 73 133 113 103 98 86
AK GULKANA 74 134 114 104 99 90
AK HOMER ARPT 64 124 104 94 89 80
AK ILIAMNA ARPT 68 128 108 98 93 N/A
AK JUNEAU INT`L ARPT 72 132 112 102 97 87
AK KENAI MUNICIPAL AP 68 128 108 98 93 83
AK KETCHIKAN INTL AP 70 130 110 100 95 82
AK KING SALMON 70 130 110 100 95 85
AK KODIAK 67 127 107 97 92 84
AK KOTZEBUE 66 126 106 96 91 86
AK MCGRATH 76 136 116 106 101 90
AK MIDDLETON ISLAND AUT 61 121 101 91 86 76
AK NENANA MUNICIPAL AP 78 138 118 108 103 97
AK NOME 67 127 107 97 92 86
AK NORTHWAY AIRPORT 76 136 116 106 101 90
AK PORT HEIDEN (AMOS) 63 123 103 93 88 N/A
AK SAINTMARY`S (AWOS) 70 130 110 100 95 90
AK SEWARD 69 129 109 99 94 91
AK SHEMYA 52 112 92 82 77 65
AK SITKA JAPONSKI AP 64 124 104 94 89 91
AK SOLDOTNA 70 130 110 100 95 81
AK ST PAUL IS. 53 113 93 83 78 67
AK TALKEETNA 75 135 115 105 100 89
AK UNALAKLEET FIELD 67 127 107 97 92 N/A
AK VALDEZ 58 118 98 88 83 87
AK WHITTIER 69 129 109 99 94 82
AK WRANGEL 70 130 110 100 95 86
AK YAKUTAT 65 125 105 95 90 87

  Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
AZ Arizona
AZ DAVIS MONTHAN AFB 104 164 144 134 129 116
AZ DOUGLAS BISBEE-DOUGLAS IN 98 158 138 128 123 109
AZ FLAGSTAFF 85 145 125 115 110 96
AZ KINGMAN (AMOS) 100 160 140 130 125 112
AZ LUKE AFB 110 170 150 140 135 124
AZ PAGE MUNI (AMOS) 98 158 138 128 123 112
AZ PHOENIX 110 170 150 140 135 121
AZ PRESCOTT LOVE FIELD 93 153 133 123 118 105
AZ SAFFORD (AMOS) 102 162 142 132 127 115
AZ TUCSON 104 164 144 134 129 117
AZ WINSLOW MUNICIPAL 96 156 136 126 121 112
AZ YUMA 110 170 150 140 135 123
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
AR Arkansas
AR BATESVILLE (AWOS) 96 156 136 126 121 109
AR BENTONVILLE 93 153 133 123 118 106
AR BLYTHEVILLE AFB EL 96 156 136 126 121 111
AR DORADO GOODWIN FIELD 97 157 137 127 122 115
AR FAYETTEVILLE DRAKE FIELD 94 154 134 124 119 108
AR FLIPPIN (AWOS) FORT SMITH 96 156 136 126 121 N/A
AR FT.SMITH 97 157 137 127 122 112
AR HARRISON FAA AP 93 153 133 123 118 106
AR JONESBORO MUNICIPAL 96 156 136 126 121 107
AR LITTLE ROCK 97 157 137 127 122 111
AR LITTLE ROCK AFB 98 158 138 128 123 111
AR NORTH LITTLE ROCK 94 154 134 124 119 109
AR PINE BLUFF FAA AP ROGERS (AWOS) 96 156 136 126 121 108
AR STUTTGART (AWOS) 96 156 136 126 121 107
AR TEXARKANA WEBB 97 157 137 127 122 110
AR FIELD WALNUT RIDGE (AWOS) 94 154 134 124 119 111
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
CA California
CA ALAMEDA NAS 79 139 119 109 104 105
CA ARCATA 66 126 106 96 91 93
CA BAKERSFIELD 103 163 143 133 128 114
CA BEALE AFB 103 163 143 133 128 113
CA BISHOP AIRPORT BLUE CANYON 100 160 140 130 125 109
CA BLUE CANYON AP 82 142 122 112 107 97
CA BLYTHE RIVERSIDE CO ARPT 112 172 152 142 137 126
CA BURBANK-GLENDALE-PASADENA 94 154 134 124 119 114
CA CAMP PENDLETON MCAS 85 145 125 115 110 112
CA CASTLE AFB 98 158 138 128 123 111
CA DAGGETT 108 168 148 138 133 119
CA EDWARDS AFB 105 165 145 135 130 115
CA EL TORO MCAS 88 148 128 118 113 100
CA EUREKA 65 125 105 95 90 N/A
CA FRESNO 103 163 143 133 128 113
CA GEORGE AFB 100 160 140 130 125 113
CA IMPERIAL 110 170 150 140 135 126
CA LANCASTER GEN WM FOX FIEL 101 161 141 131 126 112
CA LEMOORE REEVES NAS 102 162 142 132 127 117
CA LONG BEACH 87 147 127 117 112 113
CA LOS ANGELES 79 139 119 109 104 108
CA MARCH AFB 99 159 139 129 124 114
CA MATHER FIELD 100 160 140 130 125 116
CA MCCLELLAN AFB 101 161 141 131 126 113
CA MOUNT SHASTA 89 149 129 119 114 102
CA MOUNTAIN VIEW MOFFETT FLD 84 144 124 114 109 105
CA NORTON AFB/SAN BERN 101 161 141 131 126 115
CA OAKLAND 77 137 117 107 102 103
CA ONTARIO 98 158 138 128 123 115
CA PALM SPRINGS 111 171 151 141 136 129
CA PASO ROBLES MUNICIPAL ARP 100 160 140 130 125 117
CA POINT ARENA 60 120 100 90 85 81
CA POINT ARGUELLO 64 124 104 94 89 N/A
CA POINT MUGU NF PT.PIEDRAS BLANCA 76 136 116 106 101 105
CA RED BLUFF MUNICIPAL ARPT REDDING MUNICIPAL ARPT 103 163 143 133 128 115
CA REDDING 104 164 144 134 129 120
CA SACRAMENTO 99 159 139 129 124 114
CA SACRAMENTO METROPOLITAN A 100 160 140 130 125 112
CA SALINAS MUNICIPAL AP 76 136 116 106 101 101
CA SAN DIEGO 80 140 120 110 105 107
CA SAN DIEGO MIRAMAR NAS 86 146 126 116 111 112
CA SAN DIEGO NORTH ISLAND NA 73 133 113 103 98 108
CA SANDBERG 90 150 130 120 115 102
CA SAN FRANCISCO 78 138 118 108 103 105
CA SAN JOSE INTL AP 90 150 130 120 115 108
CA SAN LUIS OBISPO SANDBERG 83 143 123 113 108 112
CA SANTA BARBARA MUNICIPAL A 78 138 118 108 103 112
CA SANTA MARIA 78 138 118 108 103 108
CA STOCKTON METROPOLITAN ARP TRAVIS FIELD AFB 99 159 139 129 124 112
CA TRAVIS FIELD 97 157 137 127 122 114
CA TUSTIN MCAF 88 148 128 118 113 115
CA UKIAH MUNICIPAL AP 99 159 139 129 124 116
CA VISALIA MUNI (AWOS) 99 159 139 129 124 109
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
CO Colorado
CO AKRON WASHINGTON CO AP 93 153 133 123 118 106
CO ALAMOSA 84 144 124 114 109 94
CO AURORA BUCKLEY FIELD ANGB 91 151 131 121 116 104
CO COLORADO SPRINGS 89 149 129 119 114 99
CO CRAIG-MOFFAT (AMOS) 88 148 128 118 113 100
CO DENVER 93 153 133 123 118 105
CO DENVER/CENTENNIAL 91 151 131 121 116 102
CO EAGLE 87 147 127 117 112 98
CO FT. COLLINS 91 151 131 121 116 104
CO FORT COLLINS (SAWRS) 89 149 129 119 114 100
CO GRAND JUNCTION 96 156 136 126 121 106
CO HAYDEN/YAMPA (AWOS) 85 145 125 115 110 N/A
CO LA JUNTA MUNICIPAL AP 99 159 139 129 124 112
CO LIMON 90 150 130 120 115 99
CO PUEBLO 97 157 137 127 122 106
CO TRINIDAD LAS ANIMAS COUNT 92 152 132 122 117 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
CT Connecticut
CT BRIDGEPORT 86 146 126 116 111 103
CT HARTFORD 90 150 130 120 115 103
CT HARTFORD BRAINARD FD 89 149 129 119 114 N/A
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
DE Delaware
DE DOVER AFB 91 151 131 121 116 105
DE WILMINGTON 91 151 131 121 116 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
FL Florida
FL APALACHICOLA MUNI AP 91 151 131 121 116 102
FL CAPE SAN BLAS 86 146 126 116 111 93
FL CRESTVIEW BOB SIKES AP 95 155 135 125 120 106
FL CROSS CITY AIRPORT 94 154 134 124 119 N/A
FL DAYTONA BEACH 92 152 132 122 117 102
FL FT. LAUDERDALE 91 151 131 121 116 105
FL FT. MYERS 93 153 133 123 118 101
FL FT MYERS/SW FLORIDA 93 153 133 123 118 100
FL GAINESVILE 93 153 133 123 118 104
FL HOMESTEAD AFB 91 151 131 121 116 99
FL JACKSONVILLE 94 154 134 124 119 104
FL JACKSONVILLE CECIL FLD NA 96 156 136 126 121 105
FL JACKSONVILLE NAS 95 155 135 125 120 106
FL JACKSONVILLE/CRAIG 93 153 133 123 118 102
FL KEY WEST 90 150 130 120 115 95
FL KEY WEST NAS 90 150 130 120 115 98
FL MACDILL AFB 93 153 133 123 118 100
FL MAYPORT NS 94 154 134 124 119 105
FL MELBOURNE REGIONAL AP 92 152 132 122 117 102
FL MIAMI 91 151 131 121 116 100
FL MIAMI/KENDALL-TAMIA 92 152 132 122 117 102
FL MOLASSES REEF 86 146 126 116 111 90
FL NASA SHUTTLE FCLTY 92 152 132 122 117 101
FL ORLANDO EXECUTIVE AP 93 153 133 123 118 103
FL ORLANDO 93 153 133 123 118 101
FL ORLANDO SANFORD AIRPORT 94 154 134 124 119 103
FL PENSACOLA 93 153 133 123 118 105
FL PENSACOLA REGIONAL AP 93 153 133 123 118 106
FL SAINT PETERSBURG 93 153 133 123 118 101
FL SARASOTA 92 152 132 122 117 103
FL SETTLEMENT POINT 86 146 126 116 111 90
FL ST. AUGUSTINE 89 149 129 119 114 102
FL TALLAHASSEE 95 155 135 125 120 105
FL TAMPA 92 152 132 122 117 99
FL TYNDALL AFB 90 150 130 120 115 100
FL VALPARAISO ELGIN AFB 92 152 132 122 117 103
FL VALPARAISO HURLBURT 91 151 131 121 116 103
FL VENICE PIER 86 146 126 116 111 N/A
FL VERO BEACH MUNICIPAL 91 151 131 121 116 101
FL W. PALM BEACH 91 151 131 121 116 99
FL WHITING FIELD NAAS 94 154 134 124 119 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
GA Georgia
GA ALBANY DOUGHERTY COUNTY A 96 156 136 126 121 107
GA ATHENS 94 154 134 124 119 108
GA ATLANTA 93 153 133 123 118 106
GA ATLANTA/FULTON CO. 93 153 133 123 118 106
GA AUGUSTA 96 156 136 126 121 110
GA BRUNSWICK MALCOLM MCKINNO 92 152 132 122 117 102
GA COLUMBUS 95 155 135 125 120 106
GA FORT BENNING LAWSON 96 156 136 126 121 109
GA HUNTER (AAF) 95 155 135 125 120 106
GA MACON 96 156 136 126 121 108
GA MARIETTA DOBBINS AFB ‘ 93 153 133 123 118 106
GA MOODY AFB/VALDOSTA 95 155 135 125 120 106
GA ROME R B RUSSELL AP 95 155 135 125 120 105
GA SAVANNAH 95 155 135 125 120 107
GA VALDOSTA WB AIRPORT 95 155 135 125 120 107
GA WARNER ROBINS AFB 97 157 137 127 122 109
GA WAYCROSS WARE CO AP 95 155 135 125 120 108
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
HI Hawaii
HI BARBERS POINT NAS 90 150 130 120 115 99
HI HILO 84 144 124 114 109 93
HI HONOLULU 89 149 129 119 114 96
HI KAHULUI 88 148 128 118 113 98
HI KANEOHE BAY MCAS 84 144 124 114 109 93
HI LIHUE 84 144 124 114 109 91
HI MOLOKAI (AMOS) 86 146 126 116 111 102
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
ID Idaho
ID BOISE 96 156 136 126 121 109
ID BURLEY MUNICIPAL ARPT 89 149 129 119 114 110
ID CHALLIS (AMOS) 90 150 130 120 115 N/A
ID COEUR D`ALENE (AWOS) 88 148 128 118 113 107
ID ELK CITY (RAMOS) 91 151 131 121 116 104
ID IDAHO FALLS 90 150 130 120 115 105
ID LEWISTON NEZ PERCE CNTY A 95 155 135 125 120 110
ID MOUNTAIN HOME AFB 98 158 138 128 123 113
ID MULLAN (AWRS) 86 146 126 116 111 97
ID POCATELLO 92 152 132 122 117 105
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
IL Illinois
IL BELLEVILLE SCOTT AFB 94 154 134 124 119 106
IL CHAMPAIGN/URBANA 92 152 132 122 117 106
IL CHICAGO 91 151 131 121 116 104
IL CHICAGO MIDWAY AP 91 151 131 121 116 107
IL DECATUR AIRPORT 92 152 132 122 117 105
IL GLENVIEW NAS 92 152 132 122 117 105
IL MARSEILLES (AMOS) 92 152 132 122 117 106
IL MOLINE 92 152 132 122 117 104
IL MOUNT VERNON (AWOS) 92 152 132 122 117 103
IL PEORIA 91 151 131 121 116 104
IL QUINCY MUNI BALDWIN FLD 92 152 132 122 117 105
IL ROCKFORD 90 150 130 120 115 103
IL SPRINGFIELD 92 152 132 122 117 104
IL STERLING ROCKFALLS 89 149 129 119 114 103
IL W. CHICAGO/DU PAGE 90 150 130 120 115 104
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
IN Indiana
IN EVANSVILLE 93 153 133 123 118 104
IN FT. WAYNE 90 150 130 120 115 104
IN GRISSOM AFB/PERU 91 151 131 121 116 106
IN INDIANAPOLIS 90 150 130 120 115 102
IN LAFAYETTE PURDUE UNIV AP 92 152 132 122 117 106
IN SOUTH BEND 90 150 130 120 115 104
IN TERRE HAUTE HULMAN REGION 92 152 132 122 117 105
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
IA Iowa
IA ANKENY REGIONAL ARP 94 154 134 124 119 109
IA BURLINGTON MUNICIPAL AP 93 153 133 123 118 106
IA CEDAR RAPIDS 91 151 131 121 116 104
IA CLINTON MUNI (AWOS) 89 149 129 119 114 100
IA DES MOINES 91 151 131 121 116 107
IA DUBUQUE REGIONAL AP 89 149 129 119 114 102
IA FORT DODGE (AWOS) 90 150 130 120 115 107
IA MASON CITY 90 150 130 120 115 106
IA OTTUMWA INDUSTRIAL AP 92 152 132 122 117 106
IA SIOUX CITY 92 152 132 122 117 109
IA SPENCER 90 150 130 120 115 107
IA WATERLOO 90 150 130 120 115 105
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
KS Kansas
KS CONCORDIA BLOSSER MUNI AP 98 158 138 128 123 113
KS DODGE CITY 99 159 139 129 124 111
KS FORT RILEY MARSHALL AAF 98 158 138 128 123 110
KS GARDEN CITY MUNICIPAL AP 98 158 138 128 123 110
KS GOODLAND 95 155 135 125 120 107
KS GREAT BEND (AWOS) 98 158 138 128 123 111
KS HAYS MUNI (AWOS) 99 159 139 129 124 113
KS LIBERAL MUNI (AWOS) 99 159 139 129 124 N/A
KS MCCONNELL AFB 98 158 138 128 123 113
KS MEDICINE LODGE ASOS 101 161 141 131 126 114
KS RUSSELL MUNICIPAL AP 99 159 139 129 124 113
KS SALINA MUNICIPAL AP 100 160 140 130 125 113
KS TOPEKA 95 155 135 125 120 111
KS TOPEKA FORBES 95 155 135 125 120 113
KS WICHITA 100 160 140 130 125 113
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
KY Kentucky
KY BOWLING GREEN WARREN CO A 92 152 132 122 117 107
KY COVINGTON (CIN) 90 150 130 120 115 103
KY FORT KNOX GOODMAN 92 152 132 122 117 107
KY JACKSON JULIAN CARROLL AP 89 149 129 119 114 101
KY LEXINGTON 90 150 130 120 115 104
KY LOUISVILLE 92 152 132 122 117 105
KY LOUISVILLE BOWMAN 93 153 133 123 118 107
KY PADUCAH BARKLEY REGIONAL 94 154 134 124 119 105
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
LA Louisiana
LA BARKSDALE AFB 95 155 135 125 120 109
LA BATON ROUGE 93 153 133 123 118 103
LA ENGLAND AFB 95 155 135 125 120 109
LA FORT POLK AAF 95 155 135 125 120 106
LA GRAND ISLE 88 148 128 118 113 95
LA LAFAYETTE REGIONAL AP 93 153 133 123 118 103
LA LAKE CHARLES 93 153 133 123 118 104
LA MONROE REGIONAL AP 96 156 136 126 121 107
LA NEW ORLEANS 93 153 133 123 118 102
LA NEW ORLEANS ALVIN CALLEND 92 152 132 122 117 100
LA NEW ORLEANS LAKEFRONT AP 93 153 133 123 118 103
LA SHREVEPORT 96 156 136 126 121 108
LA SOUTHWEST PASS 91 151 131 121 116 96
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
ME Maine
ME AUGUSTA AIRPORT 86 146 126 116 111 101
ME BANGOR 87 147 127 117 112 100
ME BRUNSWICK NAS 85 145 125 115 110 100
ME CARIBOU 83 143 123 113 108 97
ME HOULTON INTL ARPT 85 145 125 115 110 99
ME LORING AFB/LIMESTON 83 143 123 113 108 97
ME MATINICUS ISLAND 66 126 106 96 91 82
ME PORTLAND 85 145 125 115 110 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
MD Maryland
MD ANDREWS AFB 93 153 133 123 118 106
MD BALTIMORE 93 153 133 123 118 106
MD PATUXENT RIVER NAS 91 151 131 121 116 103
MD SALISBURY 92 152 132 122 117 103
MD THOMAS POINT 86 146 126 116 111 97
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
MA Massachusetts
MA BOSTON 90 150 130 120 115 104
MA BUZZARDS BAY (LS) 74 134 114 104 99 N/A
MA OTIS ANGB 83 143 123 113 108 97
MA PROVINCETOWN (AWOS) 81 141 121 111 106 N/A
MA SOUTH WEYMOUTH NAS 90 150 130 120 115 102
MA WORCESTER 84 144 124 114 109 95
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
MI Michigan
MI ALPENA 86 146 126 116 111 104
MI CHIPPEWA INTL (AWOS) 81 141 121 111 106 104
MI COPPER HARBOR RAMOS 78 138 118 108 103 N/A
MI DETROIT CITY AIRPORT 90 150 130 120 115 104
MI DETROIT 89 149 129 119 114 104
MI DETROIT WILLOW RUN AP 90 150 130 120 115 103
MI ESCANABA (AWOS) 81 141 121 111 106 97
MI FLINT 88 148 128 118 113 101
MI GRAND RAPIDS 88 148 128 118 113 99
MI HANCOCK HOUGHTON CO AP 83 143 123 113 108 103
MI HARBOR BEACH (RAMOS) 88 148 128 118 113 102
MI HOUGHTON LAKE 85 145 125 115 110 101
MI IRONWOOD (AWOS) 84 144 124 114 109 102
MI JACKSON REYNOLDS FIELD 88 148 128 118 113 99
MI LANSING 88 148 128 118 113 101
MI MANISTEE (AWOS) 84 144 124 114 109 97
MI MARQUETTE COUNTY ARPT 83 143 123 113 108 101
MI MARQUETTE SAWYER AFB 84 144 124 114 109 103
MI MOUNT CLEMENS SELFRIDGE F 89 149 129 119 114 105
MI MUSKEGON 85 145 125 115 110 96
MI OSCODA WURTSMITH AFB 89 149 129 119 114 105
MI PELLSTON EMMET COUNTY AP 86 146 126 116 111 101
MI PONTIAC-OAKLAND 88 148 128 118 113 N/A
MI SAGINAW TRI CITY INTL AP 89 149 129 119 114 103
MI SAULT STE.MARIE 82 142 122 112 107 98
MI SEUL CHOIX PT (AMOS) 76 136 116 106 101 89
MI STANNARD ROCK 73 133 113 103 98 92
MI TRAVERSE CITY 87 147 127 117 112 101
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
MN Minnesota
MN AITKIN NDB (AWOS) 84 144 124 114 109 96
MN ALBERT LEA (AWOS) 87 147 127 117 112 102
MN ALEXANDRIA MUNICIPAL AP 88 148 128 118 113 104
MN BEMIDJI MUNICIPAL 86 146 126 116 111 98
MN CLOQUET (AWOS) 83 143 123 113 108 97
MN CROOKSTON MUNI FLD 85 145 125 115 110 101
MN DULUTH 83 143 123 113 108 97
MN ELY MUNI (AWOS) 83 143 123 113 108 108
MN EVELETH MUNI (AWOS) 84 144 124 114 109 98
MN FARIBAULT MUNI AWOS 88 148 128 118 113 102
MN FERGUS FALLS (AWOS) 88 148 128 118 113 110
MN GRAND RAPIDS (AWOS) 82 142 122 112 107 N/A
MN HIBBING 84 144 124 114 109 97
MN INTERNATIONAL FALLS 85 145 125 115 110 101
MN LITCHFIELD MUNI 88 148 128 118 113 N/A
MN LITTLE FALLS (AWOS) 89 149 129 119 114 102
MN MANKATO 87 147 127 117 112 N/A
MN MINNEAPOLIS 90 150 130 120 115 106
MN MONTEVIDEO (AWOS) 88 148 128 118 113 103
MN MORA MUNI (AWOS) 87 147 127 117 112 N/A
MN MORRIS MUNI (AWOS) 87 147 127 117 112 100
MN NEW ULM MUNI (AWOS) 89 149 129 119 114 105
MN OWATONNA (AWOS) 88 148 128 118 113 104
MN PASSAGE ISLAND 65 125 105 95 90 N/A
MN PEQUOT LAKE (AMOS) 88 148 128 118 113 107
MN PIPESTONE (AWOS) 87 147 127 117 112 102
MN REDWOOD FALLS MUNI 91 151 131 121 116 106
MN ROCHESTER 87 147 127 117 112 103
MN ROSEAU MUNI (AWOS) 83 143 123 113 108 N/A
MN ST. CLOUD 88 148 128 118 113 103
MN THIEF RIVER (AWOS) 84 144 124 114 109 N/A
MN TOFTE (RAMOS) 76 136 116 106 101 95
MN WARROAD (AMOS) 86 146 126 116 111 114
MN WHEATON NDB (AWOS) 87 147 127 117 112 101
MN WILLMAR 87 147 127 117 112 101
MN WINONA MUNI (AWOS) 90 150 130 120 115 N/A
MN WORTHINGTON (AWOS) 87 147 127 117 112 N/A
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
MS Mississippi
MS COLUMBUS AFB 96 156 136 126 121 107
MS COLUMBUS GOLDEN TRIANGLE 95 155 135 125 120 109
MS GREENWOOD LEFLORE ARPT 95 155 135 125 120 109
MS JACKSON 95 155 135 125 120 107
MS KEESLER AFB 93 153 133 123 118 105
MS MCCOMB PIKE COUNTY AP 94 154 134 124 119 105
MS MERIDAN 95 155 135 125 120 107
MS MERIDIAN NAAS 96 156 136 126 121 108
MS PINE BELT RGNL AWOS 95 155 135 125 120 109
MS TUPELO C D LEMONS ARPT 95 155 135 125 120 109
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
MO Missouri
MO CAPE GIRARDEAU MUNICIPAL 94 154 134 124 119 106
MO COLUMBIA 93 153 133 123 118 110
MO JOPLIN MUNICIPAL AP 93 153 133 123 118 109
MO KAISER MEM (AWOS) 94 154 134 124 119 N/A
MO KANSAS CITY 94 154 134 124 119 111
MO KANSAS CITY DOWNTOWN AP 96 156 136 126 121 112
MO KIRKSVILLE REGIONAL AP 93 153 133 123 118 107
MO POPLAR BLUFF (AMOS) 93 153 133 123 118 110
MO SPICKARD (AMOS) 94 154 134 124 119 N/A
MO SPRINGFIELD 93 153 133 123 118 108
MO ST LOUIS SPIRIT OF ST LOU 94 154 134 124 119 106
MO ST. LOUIS 94 154 134 124 119 107
MO WHITEMAN AFB 95 155 135 125 120 109
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
MT Montana
MT BILLINGS 92 152 132 122 117 107
MT BOZEMAN 89 149 129 119 114 104
MT BUTTE BERT MOONEY ARPT 86 146 126 116 111 99
MT CUT BANK 85 145 125 115 110 102
MT GLASGOW 92 152 132 122 117 107
MT GLENDIVE (AWOS) 91 151 131 121 116 106
MT GREAT FALLS 90 150 130 120 115 105
MT HAVRE CITY-COUNTY AP 93 153 133 123 118 109
MT HELENA 90 150 130 120 115 105
MT JORDAN (RAMOS) 95 155 135 125 120 112
MT KALISPELL 87 147 127 117 112 101
MT LEWISTOWN 86 146 126 116 111 102
MT MALMSTROM AFB 91 151 131 121 116 108
MT MILES CITY MUNICIPAL ARPT 97 157 137 127 122 112
MT MISSOULA 90 150 130 120 115 104
MT SIDNEY-RICHLAND 90 150 130 120 115 N/A
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
NE Nebraska
NE BELLEVUE OFFUTT AFB 94 154 134 124 119 111
NE COLUMBUS MUNI (AWOS) 91 151 131 121 116 105
NE GRAND ISLAND 95 155 135 125 120 111
NE KEARNEY MUNI (AWOS) 92 152 132 122 117 107
NE LINCOLN 96 156 136 126 121 112
NE NORFOLK 94 154 134 124 119 110
NE NORTH PLATTE 94 154 134 124 119 109
NE OMAHA 94 154 134 124 119 111
NE OMAHA EPPLEY AIRFIELD 94 154 134 124 119 110
NE SCOTTSBLUFF 95 155 135 125 120 109
NE SIDNEY MUNICIPAL AP 94 154 134 124 119 110
NE VALENTINE MILLER FIELD 95 155 135 125 120 114
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
NV Nevada
NV CALIENTE (AMOS) 98 158 138 128 123 N/A
NV ELKO 94 154 134 124 119 108
NV ELY 89 149 129 119 114 100
NV FALLON NAAS 98 158 138 128 123 N/A
NV LAS VEGAS 107 167 147 137 132 118
NV LOVELOCK DERBY FIELD 97 157 137 127 122 108
NV NELLIS AFB 109 169 149 139 134 120
NV RENO 94 154 134 124 119 104
NV TONOPAH 94 154 134 124 119 104
NV WINNEMUCCA 96 156 136 126 121 109
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
NH New Hampshire
NH CONCORD 89 149 129 119 114 102
NH ISLE OF SHOALS (LS) 80 140 120 110 105 96
NH LEBANON 87 147 127 117 112 100
NH MANCHESTER 91 151 131 121 116 108
NH MOUNT WASHINGTON 60 120 100 90 85 72
NH PEASE AFB/PORTSMOUT 88 148 128 118 113 100
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
NJ New Jersey
NJ ATLANTIC CITY 90 150 130 120 115 103
NJ MCGUIRE AFB 92 152 132 122 117 106
NJ MILLVILLE MUNICIPAL AP 91 151 131 121 116 103
NJ NEWARK 92 152 132 122 117 106
NJ TETERBORO AIRPORT 91 151 131 121 116 104
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
NM New Mexico
NM ALBUQUERQUE 95 155 135 125 120 107
NM CARLSBAD CAVERN CITY AIR 102 162 142 132 127 117
NM CLAYTON MUNICIPAL AIRPARK C 93 153 133 123 118 105
NM LOVIS CANNON AFB 96 156 136 126 121 111
NM FARMINGTON 94 154 134 124 119 107
NM GALLUP 90 150 130 120 115 102
NM HOLLOMAN AFB 98 158 138 128 123 111
NM ROSWELL INDUSTRIAL AIR PA 99 159 139 129 124 112
NM TAOS 86 146 126 116 111 N/A
NM TRUTH OR CONSEQUENCES MUN 97 157 137 127 122 111
NM TUCUMCARI 98 158 138 128 123 109
NM WHITE SANDS TEST RG 98 158 138 128 123 110
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
NY New York
NY ALBANY 87 147 127 117 112 100
NY BINGHAMTON 84 144 124 114 109 98
NY BUFFALO 85 145 125 115 110 97
NY DUNKIRK 80 140 120 110 105 99
NY ELMIRA CORNING REGIONAL A 89 149 129 119 114 104
NY FORT DRUM/WHEELER 85 145 125 115 110 97
NY GALLOO ISLAND 77 137 117 107 102 90
NY GLENS FALLS 87 147 127 117 112 101
NY GRIFFISS AFB 88 148 128 118 113 100
NY ISLIP, LI 87 147 127 117 112 104
NY JAMESTOWN (AWOS) 82 142 122 112 107 99
NY MASSENA AP 87 147 127 117 112 99
NY NYC, JFK 88 148 128 118 113 104
NY NYC, LGA 91 151 131 121 116 104
NY NIAGARA FALLS AF 87 147 127 117 112 99
NY PLATTSBURGH AFB 85 145 125 115 110 100
NY POUGHKEEPSIE DUTCHESS CO 90 150 130 120 115 107
NY ROCHESTER 87 147 127 117 112 100
NY STEWART FIELD 88 148 128 118 113 105
NY SYRACUSE 87 147 127 117 112 101
NY UTICA ONEIDA COUNTY AP 86 146 126 116 111 98
NY WATERTOWN AP 84 144 124 114 109 97
NY WHITE PLAINS 89 149 129 119 114 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
NC North Carolina
NC ASHEVILLE 87 147 127 117 112 98
NC CAPE HATTARAS 87 147 127 117 112 97
NC CAPE LOOKOUT 84 144 124 114 109 91
NC CHAROLOTTE 90 150 130 120 115 105
NC CHERRY POINT MCAS 92 152 132 122 117 106
NC DIAMOND SHOALS (LS) 83 143 123 113 108 88
NC FAYETTEVILLE POPE AFB 96 156 136 126 121 109
NC FORT BRAGG SIMMONS AAF 96 156 136 126 121 109
NC FRYING PAN SHOALS 84 144 124 114 109 88
NC GOLDSBORO SEYMOUR JOHNSON 95 155 135 125 120 108
NC GREENSBORO 92 152 132 122 117 103
NC HICKORY REGIONAL AP 92 152 132 122 117 106
NC NEW BERN CRAVEN CO REGL A 93 153 133 123 118 104
NC NEW RIVER MCAF 93 153 133 123 118 104
NC RALEIGH/DURHAM 93 153 133 123 118 105
NC SOUTHERN PINES AWOS 66 126 106 96 91 N/A
NC WILMINGTON 92 152 132 122 117 104
NC WINSTON-SALEM REYNOLDS AP 91 151 131 121 116 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
ND North Dakota
ND BISMARK 92 152 132 122 117 110
ND DEVILS LAKE (AMOS) 88 148 128 118 113 106
ND DICKINSON MUNICIPAL AP 91 151 131 121 116 110
ND FARGO 90 150 130 120 115 107
ND GRAND FORKS 90 150 130 120 115 109
ND GRAND FORKS INTERNATIONAL 89 149 129 119 114 109
ND JAMESTOWN MUNICIPAL ARPT 91 151 131 121 116 107
ND LIDGERWOOD (RAMOS) 91 151 131 121 116 112
ND MINOT 90 150 130 120 115 107
ND MINOT AFB 91 151 131 121 116 109
ND WILLISTON SLOULIN INTL AP 93 153 133 123 118 110
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
OH Ohio
OH AKRON/CANTON 87 147 127 117 112 110
OH CINCINNATI MUNICIPAL 92 152 132 122 117 105
OH CLEVELAND 88 148 128 118 113 102
OH COLUMBUS 90 150 130 120 115 102
OH COLUMBUS RICKENBACKE 91 151 131 121 116 117
OH DAYTON 90 150 130 120 115 103
OH DAYTON WRIGHT PATTERSON A 91 151 131 121 116 104
OH FINDLAY AIRPORT 89 149 129 119 114 102
OH MANSFIELD 87 147 127 117 112 99
OH TOLEDO 89 149 129 119 114 104
OH YOUNGSTOWN 87 147 127 117 112 99
OH ZANESVILLE MUNICIPAL AP 89 149 129 119 114 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
OK Oklahoma
OK ALTUS AFB 102 162 142 132 127 117
OK FORT SILL POST FIELD AF 99 159 139 129 124 113
OK GAGE AIRPORT 99 159 139 129 124 109
OK HOBART MUNICIPAL AP 101 161 141 131 126 116
OK MCALESTER MUNICIPAL AP 97 157 137 127 122 113
OK OKLAHOMA CITY 98 158 138 128 123 112
OK OKLAHOMA CITY TINKER AFB 98 158 138 128 123 111
OK OKLAHOMA CITY/WILEY 98 158 138 128 123 112
OK PONCA CITY MUNICIPAL AP 99 159 139 129 124 116
OK TULSA 98 158 138 128 123 113
OK VANCE AFB/ENID 99 159 139 129 124 113
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
OR Oregon
OR ASTORIA 72 132 112 102 97 97
OR BAKER MUNICIPAL AP 91 151 131 121 116 109
OR BURNS 90 150 130 120 115 101
OR BURNS MUNICIPAL ARPT 90 150 130 120 115 101
OR CAPE ARAGO (LS) 64 124 104 94 89 87
OR CORVALLIS 89 149 129 119 114 107
OR EUGENE 89 149 129 119 114 108
OR KLAMATH FALLS INTL AP 89 149 129 119 114 106
OR MEACHAM 85 145 125 115 110 103
OR MEDFORD 97 157 137 127 122 113
OR NEWPORT STATE BEACH 62 122 102 92 87 100
OR NORTH BEND 68 128 108 98 93 94
OR PENDLETON 94 154 134 124 119 110
OR PORTLAND 88 148 128 118 113 109
OR PORTLAND/HILLSBOR 89 149 129 119 114 107
OR REDMOND 91 151 131 121 116 106
OR SALEM 89 149 129 119 114 109
OR SEXTON SUMMIT 81 141 121 111 106 97
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
PA Pennsylvania
PA ALLENTOWN 90 150 130 120 115 102
PA ALTOONA BLAIR CO ARPT 88 148 128 118 113 102
PA BRADFORD 82 142 122 112 107 95
PA BUTLER CO. (AWOS) 87 147 127 117 112 N/A
PA DUBOIS FAA AP 85 145 125 115 110 99
PA ERIE 85 145 125 115 110 99
PA HARRISBURG 92 152 132 122 117 107
PA JOHNSTOWN CAMBRIA COUNTY 84 144 124 114 109 100
PA MIDDLETOWN HARRISBURG INT 92 152 132 122 117 108
PA PHILADELPHIA 92 152 132 122 117 105
PA PHILADELPHIA NE 92 152 132 122 117 105
PA PITTSBURGH 88 148 128 118 113 102
PA PITTSBURGH ALLEGHENY CO A 89 149 129 119 114 101
PA READING SPAATZ FIELD 90 150 130 120 115 N/A
PA WASHINGTON (AWOS) 88 148 128 118 113 N/A
PA WILKES-BARRE/S 87 147 127 117 112 100
PA WILLIAMSPORT 89 149 129 119 114 103
PA WILLOW GROVE NAS 92 152 132 122 117 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
RI Rhode Island
RI BLOCK ISLAND STATE ARPT 80 140 120 110 105 94
RI PROVIDENCE 88 148 128 118 113 105
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
SC South Carolina
SC ANDERSON COUNTY AP 94 154 134 124 119 105
SC BEAUFORT 94 154 134 124 119 108
SC CHARLESTON 93 153 133 123 118 104
SC COLUMBIA 96 156 136 126 121 108
SC FLORENCE REGIONAL AP 95 155 135 125 120 107
SC FOLLY BEACH 87 147 127 117 112 99
SC GREENVILLE 93 153 133 123 118 105
SC MYRTLE BEACH 91 151 131 121 116 106
SC SUMTER SHAW AFB 95 155 135 125 120 108
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
SD South Dakota
SD ABERDEEN REGIONAL ARPT 91 151 131 121 116 109
SD BROOKINGS (AWOS) 87 147 127 117 112 101
SD ELLSWORTH AFB 94 154 134 124 119 113
SD HURON 93 153 133 123 118 111
SD MITCHELL (AWOS) 90 150 130 120 115 105
SD MOBRIDGE 92 152 132 122 117 108
SD PIERRE 97 157 137 127 122 116
SD RAPID CITY 93 153 133 123 118 110
SD SIOUX FALLS 92 152 132 122 117 112
SD WATERTOWN MUNICIPAL AP 89 149 129 119 114 N/A
SD YANKTON (AWOS) 90 150 130 120 115 107
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
TN Tennessee
TN BRISTOL 88 148 128 118 113 101
TN CHATTANOOGA 94 154 134 124 119 106
TN CROSSVILLE MEMORIAL AP 88 148 128 118 113 101
TN DYERSBURG MUNICIPAL AP 93 153 133 123 118 104
TN FORT CAMPBELL AAF 94 154 134 124 119 106
TN JACKSON MCKELLAR-SIPES RE 94 154 134 124 119 104
TN KNOXVILLE 91 151 131 121 116 103
TN MEMPHIS 95 155 135 125 120 107
TN MEMPHIS NAS 96 156 136 126 121 107
TN NASHVILLE 93 153 133 123 118 106
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
TX Texas
TX ABILENE 98 158 138 128 123 111
TX ABILENE DYESS AFB 101 161 141 131 126 113
TX ALICE INTL AP AMARILLO 99 159 139 129 124 115
TX AMARILLO 96 156 136 126 121 110
TX AUSTIN 98 158 138 128 123 109
TX BEEVILLE CHASE NAAS 99 159 139 129 124 111
TX BERGSTROM AFB/AUSTI 99 159 139 129 124 110
TX BROWNSVILLE 95 155 135 125 120 105
TX CHILDRESS MUNICIPAL AP 100 160 140 130 125 119
TX COLLEGE STATION EASTERWOO 98 158 138 128 123 112
TX CORPUS CHRISTI 95 155 135 125 120 106
TX CORPUS CHRISTI NAS 92 152 132 122 117 106
TX COTULLA FAA AP 102 162 142 132 127 N/A
TX DALHART MUNICIPAL AP 96 156 136 126 121 109
TX DALLAS HENSLEY FIELD NAS 98 158 138 128 123 110
TX DALLAS LOVE FIELD 99 159 139 129 124 112
TX DALLAS/FT. WORTH 99 159 139 129 124 113
TX DEL RIO INTERNATIONAL AP 101 161 141 131 126 111
TX DEL RIO LAUGHLIN AFB 103 163 143 133 128 116
TX EL PASO 100 160 140 130 125 114
TX FORT WORTH MEACHAM 100 160 140 130 125 113
TX FORT WORTH NAS 99 159 139 129 124 110
TX FORT WORTH/ALLIANCE 90 150 130 120 115 115
TX GALVESTON 90 150 130 120 115 104
TX HARLINGEN RIO GRANDE VALLEY 98 158 138 128 123 107
TX HONDO MUNICIPAL AP 99 159 139 129 124 110
TX HOUSTON 96 156 136 126 121 108
TX HOUSTON ELLINGTON AFB 95 155 135 125 120 107
TX HOUSTON WILLIAM P HOBBY A 94 154 134 124 119 106
TX JUNCTION KIMBLE COUNTY AP 99 159 139 129 124 110
TX KILLEEN MUNI (AWOS) 99 159 139 129 124 107
TX KINGSVILLE 97 157 137 127 122 107
TX LAREDO INTL AP 101 161 141 131 126 113
TX LUBBOCK LUFKIN 97 157 137 127 122 112
TX MARFA AP 93 153 133 123 118 105
TX MCALLEN MILLER INTL AP 99 159 139 129 124 117
TX MIDLAND/ODESSA 99 159 139 129 124 113
TX PALACIOS MUNICIPAL AP 91 151 131 121 116 104
TX PINE SPRINGS GUADALUPE MO 92 152 132 122 117 107
TX PORT ARANSAS 85 145 125 115 110 95
TX PORT ARTHUR 93 153 133 123 118 104
TX RANDOLPH AFB 98 158 138 128 123 111
TX REESE AFB 99 159 139 129 124 116
TX ROBERT GRAY AAF 99 159 139 129 124 109
TX SABINE 87 147 127 117 112 95
TX SAN ANGELO 99 159 139 129 124 112
TX SAN ANTONIO 97 157 137 127 122 110
TX SAN ANTONIO KELLY FIELD A 99 159 139 129 124 111
TX SANDERSON (RAMOS) 97 157 137 127 122 112
TX STEPHENVILLE CLARK FIELD 96 156 136 126 121 107
TX TEMPLE/MILLER (AWOS) 98 158 138 128 123 110
TX VICTORIA 95 155 135 125 120 108
TX WACO 100 160 140 130 125 111
TX WICHITA FALLS 101 161 141 131 126 116
TX WINK WINKLER COUNTY AP 102 162 142 132 127 117
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
UT Utah
UT CEDAR CITY 93 153 133 123 118 102
UT OGDEN HILL AFB 92 152 132 122 117 105
UT PRICE/CARBON (RAMOS) 91 151 131 121 116 100
UT SALT LAKE CITY 96 156 136 126 121 107
UT WENDOVER USAF AUXILIARY F 95 155 135 125 120 107
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
VT Vermont
VT BURLINGTON 87 147 127 117 112 102
VT MONTPELIER 84 144 124 114 109 100
VT RUTLAND 83 143 123 113 108 98
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
VA Virginia
VA DAVISON AAF 95 155 135 125 120 108
VA LANGLEY AFB 92 152 132 122 117 104
VA LYNCHBURG 91 151 131 121 116 103
VA MANASSAS MUNI (AWOS) 92 152 132 122 117 N/A
VA NEWPORT NEWS 93 153 133 123 118 105
VA NORFOLK 93 153 133 123 118 105
VA OCEANA NAS 92 152 132 122 117 103
VA PETERSBURG (AWOS) 97 157 137 127 122 109
VA QUANTICO MCAS 92 152 132 122 117 105
VA RICHMOND 94 154 134 124 119 105
VA ROANOKE 88 148 128 118 113 105
VA WASHINGTON, DC 93 153 133 123 118 105
VA WASHINGTON-DULLES INTL AP 92 152 132 122 117 105
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
WA Washington
WA BELLINGHAM INTL AP 78 138 118 108 103 95
WA BREMERTON NTNL AWOS 84 144 124 114 109 104
WA DESTRUCTION ISLAND 63 123 103 93 88 78
WA FAIRCHILD AFB 89 149 129 119 114 105
WA GRAY AAF 84 144 124 114 109 102
WA HANFORD 99 159 139 129 124 114
WA KELSO WB AP 83 143 123 113 108 N/A
WA OLYMPIA 85 145 125 115 110 105
WA PASCO 97 157 137 127 122 117
WA PORT ANGELES INTL 77 137 117 107 102 N/A
WA PULLMAN/MOSCOW RGNL 90 150 130 120 115 106
WA QUILLAYUTE 76 136 116 106 101 102
WA SEATTLE BOEING FIELD 84 144 124 114 109 101
WA SEATTLE/TACOMA 83 143 123 113 108 103
WA SPOKANE 90 150 130 120 115 105
WA SPOKANE/FELTS FIELD 93 153 133 123 118 107
WA STAMPEDE PASS 75 135 115 105 100 92
WA TACOMA MCCHORD AFB 84 144 124 114 109 101
WA TATOOSH ISLAND 62 122 102 92 87 79
WA WALLA WALLA 97 157 137 127 122 114
WA WENATCHEE/PANGBORN 93 153 133 123 118 107
WA WEST POINT (LS) 69 129 109 99 94 82
WA WHIDBEY ISLAND NAS 71 131 111 101 96 88
WA YAKIMA 94 154 134 124 119 107
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
WV West Virginia
WV BECKLEY RALEIGH CO MEM AP 84 144 124 114 109 96
WV BLUEFIELD/MERCER CO 83 143 123 113 108 98
WV CHARLESTON 90 150 130 120 115 102
WV ELKINS 85 145 125 115 110 98
WV HUNTINGTON 90 150 130 120 115 102
WV MARTINSBURG 93 153 133 123 118 108
WV MORGANTOWN 89 149 129 119 114 101
WV PARKERSBURG WOOD COUNTY A 90 150 130 120 115 104
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
WI Wisconsin
WI DEVIL`S ISLAND 77 137 117 107 102 96
WI EAU CLAIRE 89 149 129 119 114 105
WI GREEN BAY 87 147 127 117 112 102
WI LA CROSSE 91 151 131 121 116 108
WI MADISON 89 149 129 119 114 104
WI MANITOWAC MUNI AWOS 83 143 123 113 108 N/A
WI MILWAUKEE 91 151 131 121 116 105
WI PARK FALLS MUNI 83 143 123 113 108 N/A
WI PHILLIPS/PRICE CO. 84 144 124 114 109 N/A
WI SHEBOYGAN 82 142 122 112 107 99
WI WAUSAU 87 147 127 117 112 103
Temperature inside conduit, in direct sunlight
2% Design Temp. Distance above roof. Up to: Maximum Temp.
12 " 3 1/2" 12" 36"
WY Wyoming
WY BIG PINEY 83 143 123 113 108 94
WY CASPER 92 152 132 122 117 103
WY CHEYENNE 87 147 127 117 112 99
WY CODY MUNI (AWOS) 89 149 129 119 114 102
WY GILLETTE (AMOS) 93 153 133 123 118 107
WY JACKSON HOLE (AWOS) 81 141 121 111 106 95
WY LANDER 90 150 130 120 115 102
WY LARAMIE GENERAL BREES FIE 83 143 123 113 108 96
WY ROCK SPRINGS ARPT 86 146 126 116 111 98
WY SHERIDAN 92 152 132 122 117 107
WY WORLAND MUNICIPAL 96 156 136 126 121 110
WY YELLOWSTONE LAKE (RAMOS) 75 135 115 105 100 N/A

Footnotes

1. ASHRAE bases its warm-season temperature conditions for each city on annual percentiles of 0.4%, 1.0% and 2.0%. As an example, the June 2.0% dry-bulb design temperature for Atlanta is 91.7F. Therefore, based on a 30-day month (i.e. 720 hours), the actual temperatures can be expected to exceed 91.7F a total of 14 hours a month. The corresponding 1.0% design temperature (93.1F) can be expected to be exceeded for 7 hours a month; while the 0.4% design temperature (94.6F) can be expected to be exceeded for 3 hours a month.

2. Calculations shown in the table are based on ASHRAE 2% design temperatures for 30 years of data*, and CDA research covering three years of monitoring air temperatures inside rooftop conduits.** The table uses the average of the June through August dry-bulb design temperatures generally the hottest months of the year in calculating the design temperatures in this table. All temperatures are rounded to the nearest whole number. The results can then be used to apply the correction factors in Table 310.16 of the National Electrical Code.

*ASHRAE has compiled 30 years of dry-bulb design temperature data in the 2005 ASHRAE Handbook of Fundamentals (The American Society of Heating, Refrigerating and Air-Conditioning Engineers. Chapter 28, Climatic Design Information Appendix Section 28.12). The table covers all of the U.S. weather station locations included in the ASHRAE Handbook. The complete Handbook can be ordered directly from ASHRAE.

**The research is described in an article written for the International Association of Electrical Inspectors IAEI News, Effect of Rooftop Exposure on Ambient Temperatures inside Conduits, January-February, 2006.

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