Solar Radiation (Wh/m2/day)
Global Direct Diffuse
State/City Lattitude/Longitude Horizontal Normal Horizontal
AL/BIRMINGHAM
33,34 N/ 86,45 W 4449 3960 2020
AL/HUNTSVILLE
34,39 N/ 86,46 W 4368 3991 1912
AL/MOBILE
30,41 N/ 88,15 W 4442 3870 2019
AL/MONTGOMERY
32,18 N/ 86,24 W 4614 4043 2095
AK/ANCHORAGE
61,10 N/150, 1 W 2403 2340 1341
AK/ANNETTE
55, 2 N/131,34 W 2623 2344 1482
AK/BARROW
71,18 N/156,47 W 2005 1900 1289
AK/BETHEL
60,47 N/161,48 W 2396 2396 1416
AK/BETTLES
66,55 N/151,31 W 2436 3027 1219
AK/BIG
DELTA 64, 0 N/145,44 W 2561 3137 1268
AK/COLD
BAY 55,12 N/162,43 W 2181 1224 1627
AK/FAIRBANKS
64,49 N/147,52 W 2551 2905 1333
AK/GULKANA
62, 9 N/145,27 W 2702 3215 1327
AK/KING
SALMON 58,41 N/156,39 W 2416 2234 1468
AK/KODIAK
57,45 N/152,20 W 2476 2491 1381
AK/KOTZEBUE
66,52 N/162,38 W 2421 2976 1233
AK/MCGRATH
62,58 N/155,37 W 2471 2712 1353
AK/NOME
64,30 N/165,26 W 2480 3023 1272
AK/ST
PAUL IS. 57, 9 N/170,13 W 2201 1159 1691
AK/TALKEETNA
62,18 N/150, 6 W 2491 2774 1343
AK/YAKUTAT
59,31 N/139,40 W 2275 1854 1465
AZ/FLAGSTAFF
35, 8 N/111,40 W 5141 6433 1427
AZ/PHOENIX
33,26 N/112, 1 W 5733 6794 1560
AZ/PRESCOTT
34,39 N/112,26 W 5334 6778 1382
AZ/TUCSON
32, 7 N/110,56 W 5700 7020 1430
AR/FORT
SMITH 35,20 N/ 94,22 W 4558 4502 1854
AR/LITTLE
ROCK 34,44 N/ 92,14 W 4514 4303 1893
CA/ARCATA
40,59 N/124, 6 W 3900 3537 1845
CA/BAKERSFIELD
35,25 N/119, 3 W 5205 5735 1605
CA/DAGGETT
34,52 N/116,47 W 5778 7465 1352
CA/FRESNO
36,46 N/119,43 W 5166 5630 1638
CA/LONG
BEACH 33,49 N/118, 9 W 4960 4966 1817
CA/LOS
ANGELES 33,56 N/118,24 W 4946 4833 1884
CA/SACRAMENTO
38,31 N/121,30 W 4933 5505 1556
CA/SAN
DIEGO 32,44 N/117,10 W 5026 5252 1726
CA/SAN
FRANCISCO 37,37 N/122,23 W 4716 5022 1609
CA/SANTA
MARIA 34,54 N/120,27 W 5172 5720 1620
CO/ALAMOSA
37,27 N/105,52 W 5260 6826 1432
CO/COLORADO
SPRINGS 38,49 N/104,43 W 4690 5647 1510
CO/BOULDER
40, 1 N/105,15 W 4576 5407 1517
CO/EAGLE
39,39 N/106,55 W 4669 5429 1594
CO/GRAND
JUNCTION 39, 7 N/108,32 W 4981 5860 1608
CO/PUEBLO
38,17 N/104,31 W 4976 6082 1478
CT/BRIDGEPORT
41,10 N/ 73, 8 W 3836 3535 1799
CT/HARTFORD
41,56 N/ 72,41 W 3806 3327 1899
DE/WILMINGTON
39,40 N/ 75,36 W 4065 3781 1863
FL/DAYTONA
BEACH 29,11 N/ 81, 3 W 4817 4286 2078
FL/JACKSONVILLE
30,30 N/ 81,42 W 4587 4175 1966
FL/KEY
WEST 24,33 N/ 81,45 W 5117 4814 1923
FL/MIAMI
25,48 N/ 80,16 W 4833 3956 2259
FL/TALLAHASSEE
30,23 N/ 84,22 W 4694 4130 2082
FL/TAMPA
27,58 N/ 82,32 W 4854 4504 1969
FL/WEST
PALM BEACH 26,41 N/ 80, 6 W 4745 4094 2096
GA/ATHENS
33,57 N/ 83,19 W 4538 4272 1938
GA/ATLANTA
33,39 N/ 84,26 W 4582 4193 2017
GA/AUGUSTA
33,22 N/ 81,58 W 4565 4265 1946
GA/COLUMBUS
32,31 N/ 84,57 W 4626 4259 1996
GA/MACON
32,42 N/ 83,39 W 4597 4236 1978
GA/SAVANNAH
32, 8 N/ 81,12 W 4612 4157 2034
HI/HILO
19,43 N/155, 4 W 4581 3615 2116
HI/HONOLULU
21,20 N/157,55 W 5393 5165 1979
HI/KAHULUI
20,54 N/156,26 W 5482 5842 1638
HI/LIHUE
21,59 N/159,21 W 4961 4481 1946
ID/BOISE
43,34 N/116,13 W 4424 5195 1482
ID/POCATELLO
42,55 N/112,36 W 4330 4906 1532
IL/CHICAGO
41,47 N/ 87,45 W 3868 3437 1865
IL/MOLINE
41,27 N/ 90,31 W 4001 3862 1785
IL/PEORIA
40,40 N/ 89,41 W 4042 3838 1818
IL/ROCKFORD
42,12 N/ 89, 6 W 3903 3644 1828
IL/SPRINGFIELD
39,50 N/ 89,40 W 4192 4125 1788
IN/EVANSVILLE
38, 3 N/ 87,32 W 4213 3964 1849
IN/FORT
WAYNE 41, 0 N/ 85,12 W 3858 3305 1907
IN/INDIANAPOLIS
39,44 N/ 86,17 W 4097 3594 1970
IN/SOUTH
BEND 41,42 N/ 86,19 W 3799 3145 1928
IA/DES
MOINES 41,32 N/ 93,39 W 4120 4215 1725
IA/MASON
CITY 43, 9 N/ 93,20 W 3969 3931 1769
IA/SIOUX
CITY 42,24 N/ 96,23 W 4111 4299 1690
IA/WATERLOO
42,33 N/ 92,24 W 3963 3841 1795
KS/DODGE
CITY 37,46 N/ 99,58 W 4861 5429 1686
KS/GOODLAND
39,22 N/101,42 W 4737 5594 1543
KS/TOPEKA
39, 4 N/ 95,38 W 4300 4405 1752
KS/WICHITA
37,39 N/ 97,25 W 4553 4825 1728
KY/COVINGTON
39, 4 N/ 84,40 W 4000 3524 1905
KY/LEXINGTON
38, 2 N/ 84,36 W 4057 3562 1932
KY/LOUISVILLE
38,11 N/ 85,44 W 4119 3674 1917
LA/BATON
ROUGE 30,32 N/ 91, 9 W 4474 3933 1984
LA/LAKE
CHARLES 30, 7 N/ 93,13 W 4608 3941 2097
LA/NEW
ORLEANS 29,59 N/ 90,15 W 4553 3982 2009
LA/SHREVEPORT
32,28 N/ 93,49 W 4612 4244 1974
ME/CARIBOU
46,52 N/ 68, 1 W 3553 3274 1840
ME/PORTLAND
43,39 N/ 70,19 W 3899 3933 1736
MD/BALTIMORE
39,11 N/ 76,40 W 4048 3885 1785
MA/BOSTON
42,22 N/ 71, 2 W 3910 3720 1803
MA/WORCHESTER
42,16 N/ 71,52 W 3861 3482 1888
MI/ALPENA
45, 4 N/ 83,34 W 3719 3539 1722
MI/DETROIT
42,25 N/ 83, 1 W 3779 3294 1853
MI/FLINT
42,58 N/ 83,44 W 3719 3177 1879
MI/GRAND
RAPIDS 42,53 N/ 85,31 W 3798 3283 1873
MI/HOUGHTON
47,10 N/ 88,30 W 3556 3375 1697
MI/LANSING
42,47 N/ 84,36 W 3759 3219 1885
MI/MUSKEGON
43,10 N/ 86,15 W 3835 3300 1849
MI/SAULT
STE. MARIE 46,28 N/ 84,22 W 3667 3491 1726
MI/TRAVERSE
CITY 44,44 N/ 85,35 W 3647 3153 1810
MN/DULUTH
46,50 N/ 92,11 W 3710 3661 1752
MN/INTERNATIONAL
FALLS 48,34 N/ 93,23 W 3553 3551 1718
MN/MINNEAPOLIS
44,53 N/ 93,13 W 3892 3990 1706
MN/ROCHESTER
43,55 N/ 92,30 W 3839 3709 1780
MN/SAINT
CLOUD 45,33 N/ 94, 4 W 3847 3981 1703
MS/JACKSON
32,19 N/ 90, 5 W 4599 4213 1970
MS/MERIDIAN
32,20 N/ 88,45 W 4467 3873 2059
MO/COLUMBIA
38,49 N/ 92,13 W 4331 4234 1852
MO/KANSAS
CITY 39,18 N/ 94,43 W 4283 4415 1733
MO/SPRINGFIELD
37,14 N/ 93,23 W 4364 4330 1797
MO/ST.
LOUIS 38,45 N/ 90,23 W 4222 4062 1835
MT/BILLINGS
45,48 N/108,32 W 4136 4795 1539
MT/CUT
BANK 48,36 N/112,22 W 3911 4600 1538
MT/GLASGOW
48,13 N/106,37 W 3857 4381 1562
MT/GREAT
FALLS 47,29 N/111,22 W 3990 4456 1617
MT/HELENA
46,36 N/112, 0 W 3961 4524 1526
MT/KALISPELL
48,18 N/114,16 W 3618 3679 1612
MT/LEWISTOWN
47, 3 N/109,27 W 3923 4426 1555
MT/MILES
CITY 46,26 N/105,52 W 4108 4783 1538
MT/MISSOULA
46,55 N/114, 5 W 3758 3954 1572
NC/ASHEVILLE
35,26 N/ 82,32 W 4292 4102 1818
NC/CAPE
HATTERAS 35,16 N/ 75,33 W 4468 4326 1814
NC/CHARLOTTE
35,13 N/ 80,56 W 4438 4211 1896
NC/GREENSBORO
36, 5 N/ 79,57 W 4369 4183 1876
NC/RALEIGH
35,52 N/ 78,47 W 4395 4031 1991
NC/WILMINGTON
34,16 N/ 77,54 W 4493 4208 1937
ND/BISMARCK
46,46 N/100,45 W 4030 4453 1634
ND/FARGO
46,54 N/ 96,48 W 3834 4084 1659
ND/MINOT
48,16 N/101,17 W 3856 4392 1578
NE/GRAND
ISLAND 40,58 N/ 98,19 W 4410 4917 1629
NE/NORFOLK
41,59 N/ 97,26 W 4252 4555 1685
NE/NORTH
PLATTE 41, 8 N/100,41 W 4431 4988 1620
NE/OMAHA
41,22 N/ 96,31 W 4202 4245 1773
NE/SCOTTSBLUFF
41,52 N/103,36 W 4434 5123 1562
NH/CONCORD
43,12 N/ 71,30 W 3902 3783 1793
NJ/ATLANTIC
CITY 39,27 N/ 74,34 W 4030 3834 1809
NJ/NEWARK
40,42 N/ 74,10 W 3899 3491 1883
NM/ALBUQUERQUE
35, 3 N/106,37 W 5569 6694 1577
NM/TUCUMCARI
35,11 N/103,36 W 5210 6146 1562
NV/ELKO
40,50 N/115,47 W 4606 5520 1495
NV/ELY
39,17 N/114,51 W 4912 5978 1535
NV/LAS
VEGAS 36, 5 N/115,10 W 5650 7050 1494
NV/RENO
39,30 N/119,47 W 4998 6165 1448
NV/TONOPAH
38, 4 N/117, 8 W 5221 6667 1405
NV/WINNEMUCCA
40,54 N/117,48 W 4717 5628 1519
NY/ALBANY
42,45 N/ 73,48 W 3792 3283 1894
NY/BINGHAMTON
42,13 N/ 75,59 W 3663 2962 1953
NY/BUFFALO
42,56 N/ 78,44 W 3679 3107 1852
NY/MASSENA
44,56 N/ 74,51 W 3723 3555 1770
NY/NEW
YORK CITY 40,47 N/ 73,58 W 3991 3455 1975
NY/ROCHESTER
43, 7 N/ 77,40 W 3693 3167 1856
NY/SYRACUSE
43, 7 N/ 76, 7 W 3721 3231 1846
OH/AKRON
40,55 N/ 81,26 W 3763 3024 1956
OH/CLEVELAND
41,24 N/ 81,51 W 3754 3040 1916
OH/COLUMBUS
40, 0 N/ 82,53 W 3828 3158 1951
OH/DAYTON
39,54 N/ 84,13 W 3943 3458 1899
OH/MANSFIELD
40,49 N/ 82,31 W 3791 3108 1945
OH/TOLEDO
41,36 N/ 83,48 W 3893 3401 1885
OH/YOUNGSTOWN
41,16 N/ 80,40 W 3630 2778 1981
OK/OKLAHOMA
CITY 35,24 N/ 97,36 W 4762 5038 1754
OK/TULSA
36,12 N/ 95,54 W 4500 4516 1818
OR/ASTORIA
46, 9 N/123,53 W 3219 2705 1701
OR/BURNS
43,35 N/119, 3 W 4411 5007 1596
OR/EUGENE
44, 7 N/123,13 W 3730 3533 1659
OR/MEDFORD
42,22 N/122,52 W 4374 4699 1559
OR/NORTH
BEND 43,25 N/124,15 W 3868 3693 1705
OR/PENDLETON
45,41 N/118,51 W 4103 4487 1566
OR/PORTLAND
45,36 N/122,36 W 3517 3077 1738
OR/REDMOND
44,16 N/121, 9 W 4403 4948 1627
OR/SALEM
44,55 N/123, 1 W 3692 3377 1740
PI/GUAM
13,33 N/144,50 E 4981 3589 2533
PA/ALLENTOWN
40,39 N/ 75,26 W 3858 3352 1906
PA/BRADFORD
41,48 N/ 78,38 W 3724 2951 1987
PA/ERIE
42, 5 N/ 80,11 W 3768 3115 1877
PA/HARRISBURG
40,13 N/ 76,51 W 3938 3490 1909
PA/PHILADELPHIA
39,53 N/ 75,15 W 3987 3672 1846
PA/PITTSBURGH
40,30 N/ 80,13 W 3797 2915 2061
PA/WILKES-BARRE
41,20 N/ 75,44 W 3760 3102 1930
PA/WILLIAMSPORT
41,16 N/ 77, 3 W 3768 3099 1923
PR/SAN
JUAN 18,26 N/ 66, 0 W 5301 4409 2276
RI/PROVIDENCE
41,44 N/ 71,26 W 3879 3585 1835
SC/CHARLESTON
32,54 N/ 80, 2 W 4604 4218 1999
SC/COLUMBIA
33,57 N/ 81, 7 W 4520 4249 1921
SC/GREENVILLE
34,54 N/ 82,13 W 4453 4389 1806
SD/HURON
44,23 N/ 98,13 W 4056 4353 1658
SD/PIERRE
44,23 N/100,17 W 4163 4631 1615
SD/RAPID
CITY 44, 3 N/103, 4 W 4256 4997 1538
SD/SIOUX
FALLS 43,34 N/ 96,44 W 4059 4317 1665
TN/BRISTOL
36,29 N/ 82,24 W 4138 3745 1868
TN/CHATTANOOGA
35, 2 N/ 85,12 W 4270 3734 1985
TN/KNOXVILLE
35,49 N/ 83,59 W 4233 3710 1971
TN/MEMPHIS
35, 3 N/ 89,59 W 4519 4330 1881
TN/NASHVILLE
36, 7 N/ 86,41 W 4369 3882 2006
TX/ABLIENE
32,26 N/ 99,41 W 5080 5477 1742
TX/AMARILLO
35,14 N/101,42 W 5029 5810 1593
TX/AUSTIN
30,18 N/ 97,42 W 4859 4631 1926
TX/BROWNSVILLE
25,54 N/ 97,26 W 4754 3949 2125
TX/CORPUS
CHRISTI 27,46 N/ 97,30 W 4568 3979 1997
TX/EL
PASO 31,48 N/106,24 W 5732 6694 1591
TX/FORT
WORTH 32,50 N/ 97, 3 W 4891 4837 1910
TX/HOUSTON
29,59 N/ 95,22 W 4434 3814 2024
TX/LUBBOCK
33,39 N/101,49 W 5105 5749 1645
TX/LUFKIN
31,14 N/ 94,45 W 4649 4193 2010
TX/MIDLAND
31,56 N/102,12 W 5330 5905 1722
TX/PORT
ARTHUR 29,57 N/ 94, 1 W 4550 4004 2008
TX/SAN
ANGELO 31,22 N/100,30 W 5130 5471 1752
TX/SAN
ANTONIO 29,32 N/ 98,28 W 4950 4541 2050
TX/VICTORIA
28,51 N/ 96,55 W 4606 3854 2159
TX/WACO
31,37 N/ 97,13 W 4870 4830 1868
TX/WICHITA
FALLS 33,58 N/ 98,29 W 4902 5185 1762
UT/CEDAR
CITY 37,42 N/113, 6 W 5047 6188 1507
UT/SALT
LAKE CITY 40,46 N/111,58 W 4584 5107 1587
VT/BURLINGTON
44,28 N/ 73, 9 W 3725 3342 1841
VA/LYNCHBURG
37,20 N/ 79,12 W 4385 4320 1831
VA/NORFOLK
36,54 N/ 76,12 W 4188 3983 1809
VA/RICHMOND
37,30 N/ 77,20 W 4219 3921 1904
VA/ROANOKE
37,19 N/ 79,58 W 4236 3976 1888
VA/STERLING
38,57 N/ 77,27 W 4121 3701 1953
WA/OLYMPIA
46,58 N/122,54 W 3263 2673 1743
WA/QUILLAYUTE
47,57 N/124,33 W 3016 2597 1596
WA/SEATTLE
47,27 N/122,18 W 3328 2940 1645
WA/SPOKANE
47,38 N/117,32 W 3843 4215 1541
WA/YAKIMA
46,34 N/120,32 W 4097 4680 1503
WV/CHARLESTON
38,22 N/ 81,36 W 3947 3282 1971
WV/ELKINS
38,53 N/ 79,51 W 3768 2893 2014
WV/HUNTINGTON
38,22 N/ 82,33 W 3933 3290 1967
WI/EAU
CLAIRE 44,52 N/ 91,29 W 3781 3668 1777
WI/GREEN
BAY 44,29 N/ 88, 8 W 3809 3676 1775
WI/LA
CROSSE 43,52 N/ 91,15 W 3872 3787 1758
WI/MADISON
43, 8 N/ 89,20 W 3915 3543 1901
WI/MILWAUKEE
42,57 N/ 87,54 W 3890 3654 1796
WY/CASPER
42,55 N/106,28 W 4401 5316 1487
WY/CHEYENNE
41, 9 N/104,49 W 4428 5210 1547
WY/LANDER
42,49 N/108,44 W 4582 5475 1591
WY/ROCK
SPRINGS 41,36 N/109, 4 W 4600 5433 1578
WY/SHERIDAN
44,46 N/106,58 W 4180 4737 1603
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