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 10 years Average Insolation Data -Major Cities in North /South America  (  KW-H/m2/day )

USA

Canada

Central / South America

Asia

 Europe

Africa

 
 
 
North America - USA                          
Country State City Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Avg
USA AL Montgomery 2.40 3.16 4.41 5.53 5.75 6.04 5.69 5.35 4,76 3.98 2.87 2.27 4.35
  AK Anchorage 0.21 0.76 1.68 3.12 3.98 4.58 4.25 3.16 1.98 0.98 0.37 0.12 2.09
  AR Little rock 2.36 3.39 4.01 5.32 5.71 6.19 6.15 5.85 5.25 4.17 2.95 2.25 4.46
  AZ Phoenix 3.25 4.41 5.17 6.76 7.42 7.70 6.99 6.11 6.02 4.44 3.52 2.75 5.38
  CA Los Angeles 3.09 4.25 5.09 6.58 7.29 7.62 7.45 6.72 6.11 4.42 3.43 2.72 5.40
  CA San Francisco 2.35 3.33 4.42 5.95 6.84 7.39 7.55 6.51 5.75 3.92 2.65 2.06 4.89
  CO Denver 2.25 3.20 4.32 5.61 6.11 6.71 6.50 5.86 5.47 4.01 2.59 1.98 4.55
  CT Hartford 1.70 2.43 3.48 4.07 5.14 5.58 5.38 5.04 4.13 2.91 1.81 1.42 3.59
  DE Dover 1.85 2.62 3.60 4.33 5.44 5.91 5.64 5.30 4.38 3.23 2.21 1.66 3.84
  FL Miami 3.72 4.61 5.42 6.40 6.61 6.29 6.26 6.08 5.47 4.84 3.96 3.46 5.26
  FL Jasonville 2.65 3.49 4.55 5.81 6.11 5.78 5.67 5.15 4.38 3.85 3.06 2.57 4.42
  GA Atlanta 2.31 3.37 4.08 5.20 6.02 6.01 5.81 5.59 4.76 3.95 2.98 2.33 4.37
  HI Honolulu 4.38 5.15 5.99 6.69 7.05 7.48 7.37 7.07 6.51 5.46 4.41 4.01 5.96
  IA Dubuque 1.64 2.58 3.34 4.57 5.54 6.06 5.81 5.26 4.33 3.03 1.72 1.35 3.77
  ID Boise 1.73 2.72 3.77 5.22 5.90 6.57 7.17 6.12 5.28 3.29 1.74 1.46 4.24
  IN Indianapolis 1.67 2.59 3.28 4.67 5.46 6.11 5.79 5.37 4.76 3.33 1.97 1.46 3.87
  IL Chicago 1.50 2.45 3.20 4.48 5.56 6.07 5.68 5.27 4.51 3.07 1.69 1.26 3.72
  KS Kansas City 2.06 2.89 3.62 4.92 5.58 6.17 6.21 5.59 4.90 3.49 2.20 1.75 4.11
  KY Louisville 1.71 2.65 3.32 4.73 5.38 6.08 5.79 5.35 4.80 3.42 2.10 1.56 3.90
  LA New Orleans 2.64 3.73 4.67 5.80 6.60 6.15 6.09 5.70 5.13 4.48 3.49 2.68 4.76
  MA Boston 1.66 2.50 3.51 4.13 5.11 5.47 5.44 5.05 4.12 2.84 1.74 1.4 3.58
  MD Annapolis 1.96 2.80 3.71 4.55 5.54 6.03 5.77 5.34 4.48 3.40 2.37 1.81 3.98
  ME Portland 1.38 2.33 3.49 4.57 5.46 6.09 6.64 5.78 4.80 2.79 1.41 1.1 3.82
  MI Detroit 1.43 2.33 3.19 4.34 5.44 5.98 5.64 4.99 4.25 2.73 1.52 1.14 3.58
  MO St.Louis 2.02 2.82 3.52 4.97 5.56 6.21 6.05 5.63 4.91 3.55 2.21 1.73 4.09
  MN Minneapolis 1.60 2.61 3.30 4.55 5.44 5.86 5.77 5.12 4.12 2.90 1.62 1.34 3.68
  MS Jackson 1.47 2.41 3.22 4.33 5.46 5.93 5.57 4.99 4.30 2.78 1.55 1.17 3.59
  MT Billings 1.55 2.57 3.52 4.82 5.63 6.45 6.39 5.75 4.67 3.19 1.77 1.3 3.96
  MT Great Falls 1.30 2.36 3.41 4.84 5.56 6.18 6.44 5.53 4.40 2.90 1.53 1.11 3.79
  NC Charlotte 2.22 3.17 3.95 4.98 5.80 6.01 5.76 5.27 4.58 3.75 2.76 2.21 4.20
  ND Fargo 1.44 2.39 3.36 4.79 5.62 5.82 5.94 5.14 4.01 2.83 1.59 1.31 3.68
  NE Omaha 1.92 2.76 3.45 4.74 5.60 6.14 6.11 5.46 4.74 3.34 2.00 1.57 3.98
  NH Manchester 1.66 2.50 3.51 4.13 5.11 5.47 5.44 5.05 4.12 2.84 1.74 1.4 3.58
  NJ Trenton 1.71 2.39 3.43 4.04 5.26 5.67 5.39 5.14 4.18 3.00 1.98 1.48 3.63
  NM Albuquerque 2.92 3.97 4.92 6.30 6.68 6.94 6.66 5.80 5.68 4.18 3.16 2.5 4.97
  NV Las Vegas 3.02 4.13 5.05 6.57 7.25 7.69 7.37 6.42 6.08 4.26 3.18 2.6 5.30
  NY Buffalo 1.63 2.31 3.39 4.71 5.29 5.86 5.85 5.39 4.51 3.26 2.10 1.49 3.82
  NY New York 1.67 2.37 3.41 3.93 5.11 5.48 5.26 5.01 4.05 2.85 1.82 1.4 3.53
  OH Columbus 1.64 2.57 3.26 4.63 5.40 6.08 5.73 5.29 4.74 3.29 1.96 1.45 3.83
  OK Tulsa 2.33 3.22 3.90 5.25 5.58 6.32 6.40 5.80 5.08 3.80 2.62 2.06 4.36
  OR Portland 1.38 2.33 3.49 4.57 5.46 6.09 6.64 5.78 4.80 2.79 1.41 1.1 3.82
  PA Philadelphia 1.85 2.62 3.60 4.33 5.44 5.91 5.64 5.30 4.38 3.23 2.21 1.66 3.84
  PA Pittsburgh 1.59 2.40 3.26 4.07 5.05 5.53 5.27 4.94 4.05 2.88 1.86 1.41 3.53
  RI Providence 1.70 2.46 3.53 4.20 5.17 5.67 5.48 5.08 4.21 2.97 1.80 1.43 3.64
  SC Columbia 2.14 2.91 3.62 5.03 5.56 6.22 6.13 5.64 4.95 3.57 2.25 1.82 4.15
  SD Sioux Falls 1.72 2.71 3.31 4.65 5.61 6.10 6.04 5.42 4.47 3.20 1.78 1.43 3.87
  TN Nashville 1.94 2.90 3.54 4.76 5.57 5.90 5.86 5.62 4.63 3.53 2.45 1.82 4.04
  TX Austin 2.63 3.32 4.42 5.38 5.61 6.29 6.45 5.96 4.96 4.15 3.04 2.38 4.55
  TX San Antonio 2.57 3.70 4.43 5.54 5.94 6.62 6.49 6.28 5.70 4.67 3.43 2.62 4.83
  TX Houston 2.47 3.50 4.40 5.59 6.03 6.45 6.36 6.07 5.46 4.61 3.30 2.44 4.72
  UT Salt Lake City 2.23 3.15 4.09 5.57 6.26 6.98 6.86 5.98 5.39 3.68 2.29 1.97 4.53
  VA Washington 1.95 2.80 3.66 4.46 5.42 5.88 5.63 5.22 4.38 3.36 2.34 1.79 3.90
  VT Montpelier 1.58 2.54 3.50 4.05 5.00 5.24 5.37 4.92 3.79 2.46 1.52 1.28 3.43
  WA Seattle 1.14 2.04 3.23 4.26 5.19 5.75 6.27 5.46 4.43 2.50 1.21 0.9 3.53
  WI Milwaukee 1.43 2.41 3.29 4.48 5.60 6.09 5.74 5.21 4.34 2.90 1.60 1.2 3.69
  WV Charleston 1.75 2.64 3.34 4.26 5.20 5.67 5.49 5.19 4.26 3.19 2.15 1.62 3.73
  WY Casper 1.93 2.80 3.79 5.13 5.90 6.68 6.50 5.90 5.13 3.59 2.06 1.65 4.25

North America-Canada

       Go top                  
Country State City Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Avg
Canada AB Edmonton 1.45 2.36 3.41 4.25 4.91 5.42 5.55 4.76 3.52 2.18 1.43 1.21 3.37
  AB Calgary 1.00 1.85 3.09 4.37 5.05 5.50 5.48 4.67 3.34 2.17 1.19 0.82 3.21
  BC Vancouver 1.07 1.90 3.09 4.17 5.01 5.33 5.72 4.95 3.64 2.10 1.19 0.88 3.25
  BC Victoria 1.00 1.82 2.93 4.01 5.13 5.54 5.85 5.28 3.88 2.17 1.11 0.86 3.29
  MB Winnipeg 1.21 2.08 3.27 4.55 5.54 5.80 5,85 4.84 3.32 2.21 1.33 1.02 3.41
  MB Churchill 0.47 1.31 2.50 3.94 4.80 5.41 5.31 4.26 2.58 1.41 0.70 0.23 2.74
  NL St. Johns 1.56 2.27 3.48 4.19 4.76 5.05 5.05 4.54 3.53 2.29 1.43 1.27 3.28
  NS Halifax 1.56 2.31 3.46 4.09 4.82 5.27 5.41 4.86 3.92 2.54 1.53 1.3 3.42
  NT Yellowknife 0.15 0.79 1.98 3.86 5.38 6.03 5.75