Diyi and the Environment!
Owning a Diyi is a practical way to help reduce greenhouse gas emissions in our atmosphere. Occasionally,the sun's radiation needs a helping hand to maintain your hot  water temperature. This mainly occurs during continual cloudy days in the winte...
Jack Zhang
George
Alex
Wendy

My insolation level

Haining Xianke Solar Energy Technology Co., Ltd.
Professional China Supplier ( Manufacturer / Exporter / Factory ) of solar water heater, solar hot water heater, solar collector, solar power/energy heater, solar water heating, solar heating project, solar thermal, solar pool heating system, pool solar heater, water heater accessories, evacuated heat pipe, vacuum tubes, tanks and more.


1).Africa
2).Asia & South Pacific
3).Canada
4).Europe
5).South America
6).USA

Insolation Levels (Africa)
Average Insolation (10 year average) kWh/m2/day

Country
State/City
Latitude
Longitude
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year Avg
BF
Ouagadougou
12' 24" N
1' 30" E
5.48
6.43
6.56
6.62
6.53
6.16
5.76
5.48
5.87
6.18
5.83
5.35
6.02
CF
Bangui
18' 32" N
120' 36" E
4.13
4.97
5.99
6.61
6.17
5.53
5.73
4.87
5.07
4.55
4.07
3.81
5.12
CM
Yaounde
3' 48" N
11' 30" W
4.94
5.38
5.16
4.68
4.46
4.42
5.17
5.07
5.03
5.4
5.29
4.83
4.98
DJ
djibouti
11' 33" N
43' 09" E
5.6
5.77
6.59
6.81
6.85
6.87
6.46
6.47
6.56
6.77
6.22
5.55
6.37
DZ
alger
36 ' 50" N
3' E
2.22
2.94
3.87
5
5.88
6.69
7.23
6.48
5.15
3.53
2.43
2.02
4.45
EG
Cairo
29' 35" N
31' 09" E
3.39
4.17
5.24
6.49
7.11
8
7.88
7.4
6.42
5.07
3.86
3.19
5.68
ET
addis abeba
9' 2" N
38' 42" E
5.96
5.8
6.23
6.31
6.11
5.79
5.03
5
5.64
6.31
6.15
5.75
5.84
GH
accra
5' 36` N
0' 12` W
5.65
6.01
5.65
5.33
5
4.49
4.5
4.59
4.67
5.25
5.7
5.55
5.2
GM
gambia
13' 28" N
16' 39" W
5.01
5.93
6.67
6.92
6.72
6.06
5.48
5.09
5.3
5.67
5.36
4.95
5.76
GN
conakry
9' 36" N
13' 36" E
5.81
6.41
6.51
6.22
5.69
5.69
5.09
5.05
5.46
5.87
5.98
5.6
5.78
KE
nairobi
1' 16" S
36' 48" E
6.05
6.24
6.07
5.7
5.42
5.14
4.88
5.09
5.78
6.03
5.48
5.6
5.62
LR
liberia
6' 30" N
9' 30" W
5.43
5.72
5.59
5.31
5.11
4.61
4.25
4.19
4.67
5.13
5.24
5.2
5.03
LY
tarabulus
32' 54" N
13' 11" E
3.1
4.03
5.19
6.48
6.89
7.77
8.11
7.45
6.12
4.58
3.35
2.76
5.48
MA
rabat
32' 32" N
9' 17" W
3.13
3.86
5.09
6.08
6.89
7.31
7.34
6.8
5.69
4.37
3.25
2.82
5.21
ML
bamako
12' 30" N
7' 54" E
5.61
6.35
6.64
6.78
6.42
6.47
5.87
5.65
6.04
6.13
5.85
5.36
6.09
MR
nouakchott
17' 45" N
15' 45" E
5.31
6.21
6.8
7.54
7.57
7.63
7.2
6.9
6.78
6.34
5.49
4.88
6.55
NE
niamey
13' 30" N
2' 12" W
5.42
6.39
6.72
6.79
6.75
6.31
6.07
5.78
6.07
6.16
5.79
5.29
6.12
NG
abuja
9' 12" N
7' 11" E
5.57
6.33
6.22
6.1
5.89
5.47
4.92
4.65
5.12
5.82
5.81
5.42
5.61
SD
al khur-tum
15' 33" N
32' 32" E
5.46
6.19
6.75
7.25
6.85
6.96
6.52
6.35
6.42
6.17
5.66
5.22
6.31
SL
freetown
8' 29" N
13' 14" W
5.19
5.91
6.08
5.47
4.76
4.09
3.6
3.58
4.25
4.84
4.93
4.94
4.8
SN
dakar
14' 38" N
17' 27" W
4.84
5.77
6.56
6.81
6.7
5.7
5.15
5.01
5.13
5.46
5.03
4.63
5.56
SO
muqdisho
2' 02" N
45' 20" E
6.38
6.81
6.71
6.28
5.85
5.45
5.21
5.61
6.15
6.16
6
5.91
6.04
TN
tunis
36' 47.8" N
10' 6.8" E
2.29
3.06
4.09
5.47
6.38
7.16
7.57
6.8
5.33
3.65
2.54
2.08
4.7

Insolation Levels (Asia-Pacific)
Average Insolation (10 year average) kWh/m2/day

Country
City
Latitude
Longitude
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year Avg
AE
Abu Dhabi
24' 28" N
54' 22" E
3.92
4.50
5.22
5.87
7.06
7.33
6.90
6.64
6.39
5.53
4.54
3.79
5.64
AU
Adelaide
34" 55" S
138" 36" E
7.2
6.58
5.18
3.85
2.65
2.23
2.48
3.2
4.46
5.69
6.59
6.74
4.74
AU
Brisbane
27" 99" S
153" 8" E
6.93
6.09
5.44
4.34
3.5
3.29
3.52
4.43
5.62
6.18
6.74
6.93
5.25
AU
Hobart
42" 52" S
147" 19" E
5.97
5.33
4.05
2.73
1.79
1.44
1.68
2.41
3.6
4.78
5.92
6.18
3.82
AU
Melbourne
37" 47" S
144" 58" E
6.78
6.22
4.76
3.4
2.29
1.84
2.04
2.79
3.94
5.27
6.28
6.46
4.34
AU
Perth
31" 57" S
115" 52" E
7.7
6.75
5.41
4.16
3.06
2.67
2.89
3.66
4.76
6.09
7.04
7.76
5.16
AU
Sydney
34" S
151" 0" E
6.34
5.68
4.87
3.6
2.74
2.5
2.67
3.53
4.67
5.61
6.32
6.6
4.59
BD
Dhaka
23' 42" N
90' 22" E
4.44
5.08
5.87
6.06
5.50
4.41
4.09
4.37
4.17
4.50
4.37
4.13
4.75
CN
Beijing
39' 55" N
116' 25" E
2.37
2.92
3.58
5.61
4.83
5.68
5.42
4.49
4.25
3.20
2.66
2.04
3.92
CN
Nanjing
32' 03" N
118' 53" E
2.04
2.22
2.65
4.50
3.84
4.47
4.93
4.50
3.67
3.02
2.88
2.08
3.40
CN
Shanghai
31' 10" N
121' 28" E
2.29
2.63
3.07
4.54
4.38
4.59
5.52
5.23
4.03
3.39
2.97
2.38
4.01
CN
Hongkong
22' 18" N
114' 10" E
2.59
2.56
3.06
3.93
4.13
4.74
5.81
4.95
4.68
4.05
3.56
2.93
4.18
ID
Jakarta
6' 11" S
106' 50" E
4.15
4.59
5.00
4.94
4.88
4.71
5.09
5.46
5.66
5.36
4.76
4.47
5.03
IL
Tel Aviv
32' 05" N
34' 46" E
2.78
3.5
4.73
6.03
6.86
7.87
7.81
7.22
6.19
4.63
3.32
2.62
5.73
IR
Tabriz
38' 48" N
46' 18" E
1.79
2.40
3.37
4.58
5.54
6.71
6.97
6.06
5.20
3.26
2.14
1.56
4.13
IR
Tehran
35' 40" N
51' 26" E
2.23
2.84
3.72
5.12
5.99
7.32
7.20
6.41
5.59
3.90
2.61
2.02
4.58
IR
Mashhad
36' 16" N
59' 34" E
2.22
2.97
3.88
5.21
6.29
7.49
7.41
6.78
5.70
4.13
2.78
2.06
4.74
IR
Bandar" Abbas
27' 15" N
56' 15" E
3.63
4.43
5.14
6.29
7.43
7.96
7.41
6.97
6.58
5.51
4.29
3.37
5.75
IN
New Delhi
28' N
77" E
3.68
4.47
5.50
6.60
7.08
6.55
5.01
4.62
5.11
4.99
4.15
3.42
5.10
IN
Bombay
18' 33" N
72' 32" E
5.22
6.03
6.66
7.05
6.77
4.59
3.54
3.40
4.72
5.39
5.15
4.80
5.28
IN
Bangalore
12' 57" N
77' 37" E
5.00
5.90
6.44
6.42
6.13
4.76
4.48
4.59
4.98
4.68
4.34
4.40
5.18
IQ
Baghdad
33' 20" N
44' 24" E
2.79
3.64
4.59
5.76
6.83
8.10
7.97
7.29
6.25
4.44
3.04
2.52
5.27
JO
Amman
31' 57" N
35' 57" E
2.93
3.67
4.83
6.04
6.88
7.91
7.86
7.27
6.25
4.71
3.47
2.76
5.80
JP
Tokyo
35' 45" N
139' 38" E
2.31
2.99
3.70
4.90
5.07
4.47
4.88
5.42
3.82
2.98
2.50
2.23
4.00
KH
Phnom penh
11' 33" N
104' 51" E
5.27
5.78
6.02
5.76
5.09
4.30
4.55
4.07
4.34
4.41
4.88
5.03
4.85
KP
P" yongyang
39' N
125' 18" E
2.50
3.35
4.50
5.17
5.60
5.35
4.51
4.63
4.22
3.51
2.46
2.09
4.20
KR
Seoul
37' 31" N
127' E
2.62
3.40
4.29
5.24
5.63
5.15
4.26
4.55
3.99
3.64
2.60
2.24
4.16
LA
Vientiane
18' 07" N
102' 35" E
4.30
4.94
5.52
5.74
5.11
4.24
4.22
4.19
4.61
4.26
4.21
4.24
4.63
LB
Beirut
33' 54N
35' 28E
2.64
3.4
4.63
6.03
6.96
7.9
7.84
7.19
6.13
4.5
3.14
2.44
5.68
MM
Yangon
16' 47" N
96' 09" E
5.40
6.06
6.65
6.69
5.14
3.24
3.30
2.99
4.12
4.51
4.82
5.05
4.65
MN
Ulaanbaatar
47' 55" N
106' 54" E
1.79
2.77
4.24
5.53
6.26
6.15
5.55
4.88
4.17
3.00
1.82
1.40
4.30
MY
Kuala Lumpur
3' 07" N
101' 42" E
4.54
5.27
5.14
5.05
4.80
4.98
4.91
4.78
4.54
4.51
4.23
4.07
4.70
NZ
Auckland
36" 52" S
174" 45" E
6.37
5.9
4.71
3.43
2.44
2
2.25
2.95
4.13
5.23
6.05
6.56
4.34
NZ
Christchurch
43" 32s
172" 37e
5.9
4.95
3.86
2.75
1.72
1.31
1.47
2.15
3.3
4.34
5.43
5.64
3.57
NZ
Wellington
41" 17" S
174" 47" E
6.27
5.31
4.17
3
1.95
1.54
1.74
2.46
3.66
4.7
5.73
6.01
3.88
OM
Mascat
23' 37" N
58' 37" E
4.34
5.00
5.85
6.69
7.54
7.56
6.91
6.71
6.55
5.93
4.95
4.23
6.29
PH
Cebu
10' 19" N
123' 54" E
4.53
5.15
5.83
6.25
5.90
4.83
4.76
4.93
4.96
4.75
4.49
4.44
5.07
PH
Manila
14' 37" N
120' 58" E
4.82
5.62
6.42
6.75
6.19
4.96
4.94
4.41
4.86
4.63
4.59
4.50
5.22
SA
Riyadh
24' 39" N
46' 42" E
4.03
4.92
5.56
6.24
7.27
7.99
7.86
7.46
6.83
5.80
4.58
3.82
6.03
SG
Singapore City
1' N
103' E
4.43
5.52
5.05
5.05
4.62
4.66
4.51
4.61
4.49
4.50
3.98
3.93
4.61
TH
Bang Kok
13' 45" N
100' 30" E
4.42
4.65
4.84
5.03
4.75
3.77
4.22
3.46
3.63
3.89
4.16
4.40
4.27
TH
Chiang Mai
18' N
99' E
4.79
5.51
6.11
6.29
5.53
4.44
4.16
4.18
4.50
4.34
4.28
4.48
4.88
TR
Ankara
39' 57" N
32' 53" E
1.77
2.38
3.69
4.54
5.53
6.63
6.99
6.55
5.22
3.24
1.99
1.51
4.17
VN
Hanoi
21' N
105' 54" E
2.52
2.94
3.81
4.34
4.66
4.51
4.62
4.62
4.57
3.64
3.29
3.17
3.89
YE
Aden
12" 50" N
45' 02" E
5.45
5.78
6.52
6.48
6.71
6.72
6.33
6.33
6.41
6.54
5.99
5.39
6.22

Insolation Levels (Canada)
Average Insolation (10 year average) kWh/m2/day

State
City
Latitude
Longitude
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year Avg
AB
Edmonton
53o 34' N
113o 31' W
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
BC
Victoria
48o 25' N
123o 19' W
1
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
49o 54' N
97o 14' W
1.21
2.08
3.27
4.55
5.54
5.8
5,85
4.84
3.32
2.21
1.33
1.02
3.41
NL
St. Johns
45o 19' N
65o 53' W
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
44o 39' N
63o 34' W
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
ON
Toronto
43o 41' N
79o 38' W
1.44
2.27
3.19
4.13
5.15
5.83
5.67
4.82
3.66
2.47
1.48
1.20
3.44
QC
Montreal
45o 28' N
73o 45' W
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
SK
Regina
45o 19' N
65o 53' W
1.14
1.96
3.02
4.69
5.48
5.79
6.14
4.96
3.42
2.29
1.30
0.95
3.42

Insolation Levels (Europe)
Average Insolation (10 year average) kWh/m2/day

Country
State/City
Latitude
Longitude
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year Avg
AT
Vienna
48' 13" N
16' 22" E
1.10
1.81
2.80
3.76
4.76
5.12
5.72
4.98
3.68
2.15
1.28
0.93
3.52
BE
Bruxelles
50' 45" N
4' 30" E
0.74
1.31
2.29
3.68
4.67
4.48
4.82
4.20
2.86
1.73
0.92
0.56
3.02
BG
Sofija
42' 40" N
23' 18" E
1.5
2.04
2.97
4.05
5
5.8
6.29
5.68
4.46
2.75
1.62
1.27
3.99
CY
Limassol
34' 40" N
33' 03" E
2.52
3.26
4.54
6.00
6.85
7.81
7.80
7.18
6.11
4.43
3.02
2.31
5.61
CR
Zagreb
45' 29" N
15' 35" E
1.30
2.00
2.94
3.91
5.03
5.37
5.93
5.19
3.94
2.39
1.39
1.09
3.72
DE
Hamburg
53' 33" N
9' 59" E
0.54
1.11
2.09
3.68
4.86
4.47
4.47
3.89
2.59
1.48
0.69
0.40
2.52
DE
Munich
48' 05" N
11' 23" E
1.05
1.80
2.82
3.95
4.84
4.65
5.14
4.46
3.20
2.00
1.02
0.79
2.98
ES
Madrid
40' 25" N
3' 41" W
1.93
2.75
4.09
4.83
5.85
6.52
7.11
6.30
4.91
3.07
1.97
1.59
4.62
ES
Malaga
36' 42" N
4' 42" W
2.52
3.24
4.51
5.40
6.35
7.09
7.64
6.81
5.39
3.70
2.58
2.14
5.16
ES
Barcelona
41' 24" N
2' 9" E
1.89
2.71
3.97
4.99
5.82
6.56
7.01
6.07
4.72
3.11
2.04
1.70
4.60
ES
Alicante
38' 40" N
0' 30" W
2.23
3.02
4.26
5.39
6.13
6.89
7.34
6.53
5.11
3.45
2.34
1.94
4.94
FX
Lyon
45' 46" N
4' 50" E
1.26
1.97
3.02
4.08
4.97
5.40
6.03
5.23
3.93
2.27
1.43
1.08
3.74
FX
Paris
48' 52" N
2' 20" E
0.89
1.62
2.62
3.95
4.90
4.83
5.35
4.61
3.33
2.00
1.12
0.72
3.34
FX
Toulouse
43' 37" N
1' 26" E
1.39
2.14
3.19
4.03
4.82
5.16
5.86
5.07
4.09
2.48
1.58
1.25
3.75
GR
Athens
38' N
23' 43" E
2.00
2.52
3.67
5.21
6.38
7.52
7.61
6.91
5.57
3.50
2.16
1.63
4.56
HU
Budapest
47' 30" N
19' 3" E
1.00
1.71
2.76
3.90
5.03
5.30
5.62
4.84
3.57
2.24
1.17
0.88
3.17
IE
Dublin
53' 20" N
6' 15" W
0.56
1.07
1.97
3.32
4.40
4.30
4.30
3.40
2.69
1.43
0.77
0.43
2.39
IT
Milan
45' 28" N
9' 12" E
1.27
1.89
2.91
3.65
4.84
5.36
5.97
5.21
3.91
2.40
1.42
1.08
3.33
IT
Rome
41' 53" N
12' 30" E
1.78
2.52
3.71
4.87
5.98
6.84
7.08
6.34
4.83
3.08
1.98
1.56
4.21
NL
Amsterdam
52' 21" N
4' 54" E
0.61
1.21
2.27
3.76
4.88
4.73
4.78
4.13
2.80
1.60
0.78
0.45
2.67
NO
Oslo
59' 56" N
10' 44" E
0.3
0.87
1.68
3.12
4.65
4.84
4.59
3.36
2.22
1.02
0.42
0.19
2.27
RO
Bucharest
44' 26" N
26' 06" E
1.36
1.94
2.91
3.94
5.03
5.6
6.15
5.53
4.15
2.59
1.37
1.1
3.47
PT
Lisboa
38' 42" N
9' 11" W
2.27
2.99
4.3
5.15
6.13
6.46
6.89
6.33
5.11
3.44
2.27
1.84
4.43
PT
Oviedo
43' 21" N
5' 50" W
1.67
2.29
3.44
4.59
5.56
6.32
6.86
5.95
4.51
2.71
1.77
1.46
3.93
UA
Odessa
46' 30" N
30' 46" E
1.08
1.78
2.68
3.87
5.4
5.7
6.39
5.63
3.96
2.45
1.06
0.87
3.41
UK
Edinburgh
55' 55" N
3" 10" W
0.44
0.94
1.86
3.18
4.33
4.34
4.13
3.41
2.43
1.2
0.59
0.32
2.26
UK
London
51' 32" N
0' 5" W
0.67
1.26
2.22
3.48
4.54
4.51
4.74
4.01
2.86
1.65
0.89
0.52
2.61
SZ
Bern
46' 57" N
7' 26" E
1.1
1.77
2.74
3.6
4.7
5.07
5.68
4.95
3.66
2.18
1.26
0.92
3.14
SZ
Lausanne
46' 32" N
6' 39" E
1.10
1.81
2.80
3.76
4.76
5.12
5.72
4.98
3.68
2.15
1.28
0.93
3.17
YU
Beograd
44' 50" N
20' 30" E
1.29
1.89
2.92
3.86
4.88
5.45
6
5.3
4.05
2.5
1.4
1.11
3.39

Insolation Levels (Sth America)
Average Insolation (10 year average) kWh/m2/day

Country State/City Latitude Longitude Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Avg
Belize Belize City 17º 30' N 88º 11' W 3.73 4.59 5.45 5.97 5.75 5.19 5.03 5.16 4.82 4.50 3.99 3.54 4.81
Costa Rica San Jose 09º 59' N 84º 04' W 6.09 6.74 7.23 6.64 5.26 5.00 4.94 4.84 4.76 4.63 4.63 5.30 5.51
El Salvador San Salvador 13º 40' N 89º 10' W 5.58 6.23 6.68 6.52 5.95 5.74 6.22 6.18 5.49 5.61 5.42 5.30 5.91
Guatemala Guatemala City 14º 37' N 90º 31' W 4.93 5.48 5.90 5.81 5.35 4.91 5.27 5.12 4.59 4.68 4.65 4.62 5.11
Honduras Tegucigalpa 14º 05' N 87º 14' W 4.26 5.08 5.84 5.99 5.54 5.35 5.34 5.47 5.04 4.43 4.15 3.91 5.03
Mexico Acapulco 16º 50' N 99º 54' W 5.46 6.30 7.17 7.41 7.06 6.16 6.29 6.20 5.45 5.94 5.56 5.19 6.18
Mexico Cancun 21º 10' N 86º 50' W 4.16 5.14 6.04 6.86 6.79 6.47 6.63 6.65 5.86 5.19 4.51 3.90 5.68
Mexico Chihuahua 28º 39' N 106º 05' W 3.41 4.34 5.63 6.43 6.88 6.53 5.69 5.30 5.14 4.65 3.89 3.26 5.10
Mexico Guadalajara 20º 40' N 103º 40' W 4.24 5.18 6.21 6.71 6.89 6.00 5.23 5.41 5.14 5.11 4.79 4.13 5.42
Mexico La Paz 24º 09' N 110º 18' W 3.73 4.67 5.75 6.63 7.16 7.07 6.40 6.06 5.52 4.93 4.11 3.51 5.46
Mexico Mexico City 19º 26' N 99º 08' W 4.34 5.07 5.89 5.95 5.90 5.03 4.76 4.86 4.57 4.73 4.57 4.29 5.00
Mexico Monterrey 25º 40' N 100º 23' W 3.33 4.20 5.40 5.71 6.06 5.89 5.59 5.44 4.76 4.49 3.90 3.23 4.83
Mexico Oaxaca 17º 04' N 96º 43' W 4.36 4.99 5.74 6.08 5.86 5.01 4.92 4.95 4.43 4.63 4.38 4.08 4.95
Mexico Puerto Vallarta 20º 39' N 105º 14' W 4.20 5.29 6.39 7.12 7.51 6.96 6.17 5.99 5.32 5.30 4.82 4.00 5.76
Mexico Tijuana 32º 32' N 117º 01' W 3.32 4.15 5.23 6.37 6.61 6.43 6.46 6.31 5.40 4.26 3.65 3.08 5.11
Mexico Veracruz 19º 10' N 96º 07' W 3.55 4.13 4.86 5.35 5.40 5.12 5.15 5.17 4.66 4.45 3.92 3.43 4.60
Nicaragua Managua 12º 10' N 86º 15' W 5.34 5.89 6.59 6.54 5.83 5.67 5.70 5.69 5.43 5.39 5.15 5.05 5.69
Panama Panama City 08º 58' N 79º 33' W 5.27 5.92 6.23 5.75 4.78 4.11 4.16 4.15 4.24 3.99 4.23 4.66 4.79
Cuba Havana 23º 09' N 82º 21' W 4.09 4.97 5.92 7.06 7.15 7.10 6.90 6.86 6.10 5.12 4.26 3.74 5.77
Jamaica Kingston 17º 58' N 76º 48' W 4.92 5.67 6.45 6.80 6.50 6.82 6.84 6.61 6.23 5.45 4.76 4.58 5.97
Puerto Rico San Juan 18º 15' N 66º 30' W 4.26 4.90 5.70 6.09 5.89 6.09 6.08 5.78 5.26 4.80 4.36 4.15 5.28
Martinique Fort de France 14º 37' N 61º 05' W 5.35 5.98 6.59 6.94 6.70 6.42 6.49 6.45 6.03 5.87 5.15 5.15 6.09
Dominican Rep. Santiago 18º 29' N 69º 54' W 3.89 4.46 5.24 5.53 5.52 5.48 5.41 5.13 4.80 4.46 4.03 3.78 4.81
Argentina Buenos Aires 34º 36' S 58º 23' W 6.44 5.67 4.53 3.53 2.74 2.04 2.31 3.27 4.23 5.12 6.36 6.44 4.39
Argentina Cordoba 31º 24' S 64º 12' W 7.07 6.30 4.90 3.87 3.01 2.65 2.79 3.63 4.76 5.93 6.63 6.96 4.88
Argentina Rio Gallegos 51º 37' S 69º 13' W 5.47 4.63 3.32 2.02 1.07 0.71 0.81 1.61 2.87 4.26 5.53 5.79 3.17
Bolivia La Paz 16º 29' S 68º 08' W 5.30 5.57 5.16 5.01 4.78 4.37 4.51 4.96 5.66 5.98 6.15 5.92 5.28
Bolivia Santa Cruz 17º 47' S 63º 10' W 4.57 4.90 4.57 3.92 3.44 3.25 3.44 4.01 4.45 5.00 5.21 5.01 4.31
Bolivia Sucre 19º 02' S 65º 15' W 1.67 2.29 3.47 4.58 5.59 6.37 6.86 5.97 4.51 2.73 1.77 1.46 3.94
Brazil Belem 01º 27' S 48º 29' W 4.54 4.34 4.26 4.46 4.75 4.99 5.27 5.50 5.85 5.79 5.52 4.96 5.02
Brazil Belo Horizonte 19º 55' S 43º 56' W 5.45 5.63 5.34 4.78 4.30 4.09 4.32 4.82 5.05 5.26 5.25 4.98 4.94
Brazil Brasilia 15º 52' S 47º 56' W 5.21 5.15 5.09 4.99 4.80 4.59 4.86 5.46 5.28 5.23 4.97 4.82 5.04
Brazil Curitiba 25º 26' S 49º 15' W 5.48 4.88 4.32 3.57 2.95 2.83 2.96 3.47 3.87 4.65 5.44 5.41 4.15
Brazil Fortaleza 03º 43' S 38º 31' W 5.85 5.44 4.82 4.80 5.11 5.34 5.74 6.34 6.60 6.62 6.50 6.16 5.78
Brazil Manaus 03º 08' S 60º 01' W 4.15 4.12 4.22 4.34 4.08 4.24 4.55 4.98 5.23 4.93 4.72 4.23 4.48
Brazil Porto Alegre 30º 02' S 51º 13' W 6.08 5.56 4.54 3.48 2.81 2.27 2.50 3.06 3.89 5.01 5.93 6.50 4.30
Brazil Recife 08º 05' S 34º 54' W 6.59 6.22 5.95 5.05 4.84 4.61 4.38 5.07 5.78 6.23 6.40 6.48 5.63
Brazil Rio de Janeiro 22º 54' S 42º 10' W 5.40 5.34 4.87 4.11 3.43 3.35 3.39 3.83 3.77 4.41 4.97 4.98 4.32
Brazil Salvador 12º 59' S 38º 30' W 5.89 5.79 5.28 4.59 4.09 3.75 3.83 4.26 4.79 5.32 5.38 5.61 4.88
Brazil Sao Paulo 23º 33' S 46º 39' W 5.44 5.05 4.75 4.21 3.47 3.36 3.54 4.19 4.25 5.09 5.73 5.38 4.54
Chile Iquique 20º 13' S 70º 10' W 7.42 7.34 6.19 4.70 3.45 2.78 3.04 3.39 4.53 5.37 6.36 7.40 5.16
Chile Osorno 40º 35' S 73º 14' W 6.78 6.02 4.34 2.93 1.91 1.43 1.69 2.48 3.50 4.95 6.47 6.98 4.12
Chile Santiago 33º 27' S 70º 42' W 7.55 6.56 5.13 3.83 2.59 2.22 2.38 3.09 4.08 5.64 6.84 7.82 4.81
Chile Valparaiso 33º 01' S 71º 38' W 7.55 6.56 5.13 3.83 2.59 2.22 2.38 3.09 4.08 5.64 6.84 7.82 4.81
Columbia Bogota 04º 36' N 74º 05' W 4.50 4.48 4.67 4.46 4.45 4.63 4.71 4.70 4.80 4.28 4.24 4.32 4.52
Columbia Cali 03º 27' N 76º 30' W 3.63 3.90 4.09 3.89 3.76 3.71 4.05 3.93 3.89 3.52 3.49 3.44 3.78
Columbia Cartagena 10º 25' N 75º 32' W 5.74 6.18 6.54 6.30 5.62 5.56 5.66 5.72 5.35 4.72 4.90 5.30 5.63
Columbia Medellin 06º 14' N 75º 34' W 3.95 4.22 4.38 3.95 4.01 4.36 4.67 4.51 4.37 3.82 3.78 3.86 4.16
Ecuador Guayaquil 02º 13' S 79º 54' W 6.07 6.01 6.31 6.31 5.83 4.88 4.50 4.50 4.95 4.69 5.29 5.93 5.44
Ecuador Quito 00º 14' S 78º 30' W 3.57 3.56 3.71 3.71 3.73 3.81 3.85 3.88 3.89 3.79 3.85 3.68 3.75
French Guiana Cayenne 04º 56' N 52º 27' W 3.91 4.34 4.55 4.66 4.04 4.25 4.96 5.40 5.81 5.51 4.91 4.29 4.72
Guyana Georgetown 06º 50' N 58º 12' W 4.12 4.57 4.98 5.09 4.49 4.32 4.65 4.90 5.15 4.88 4.42 4.01 4.63
Peru Arequipa 16º 25' S 71º 32' W 4.95 5.26 4.88 4.90 4.80 4.53 4.78 5.16 5.70 5.84 5.96 5.54 5.19
Peru Cusco 13º 30' S 71º 58' W 4.19 4.43 4.23 3.99 3.74 3.56 4.01 4.29 4.55 4.72 4.67 4.50 4.24
Peru Lima 12º 03' S 77º 02' W 7.27 7.52 7.25 6.28 4.78 3.34 3.17 3.39 4.33 5.11 6.02 6.85 5.44
Paraguay Asuncion 25º 20' S 57º 31' W 6.10 5.77 4.98 3.84 3.48 2.76 3.09 3.97 4.49 5.26 6.22 6.26 4.69
Suriname Paramaribo 05º 49' N 55º 09' W 4.13 4.63 5.07 5.08 4.78 4.78 5.12 5.42 5.87 5.61 4.97 4.47 4.99
Venezuela Caracas 10º 30' N 66º 54' W 5.14 5.82 6.11 5.94 5.76 5.63 5.77 5.77 5.72 5.56 5.01 4.84 5.59
Venezuela Maracaibo 10º 39' N 71º 36' W 4.71 5.09 5.42 5.22 5.12 5.28 5.49 5.31 5.20 4.68 4.55 4.51 5.05
Venezuela Valencia 10º 09' N 68º 00' W 5.75 6.68 7.17 7.28 6.48 5.11 5.92 6.26 6.26 6.13 5.76 5.41 6.18

Insolation Levels (Nth America)
Average Insolation (10 year average) kWh/m2/day

State
City
Latitude
Longitude
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Year Avg
AL
Birming han
33' 34" N
86' 45" W
2.29
3.31
4.04
5.14
5.92
5.98
5.81
5.7
4.8
3.93
2.96
2.25
4.34
AK
Anchorage
61' 10" N
150' 1" W
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
32' 25" N
94' 44" W
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
33 ' 26" N
112' 1" W
3.25
4.41
5.17
6.76
7.42
7.7
6.99
6.11
6.02
4.44
3.52
2.75
5.38
CA
Los Angeles
34' N
118' W
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
38' 31" N
121' 30" W
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
39' 45" N
104' 52" W
2.25
3.2
4.32
5.61
6.11
6.71
6.5
5.86
5.47
4.01
2.59
1.98
4.55
CT
Hartford
41' 44" N
72' 39" W
1.7
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
39' 8" N
75' 28" W
1.85
2.62
3.6
4.33
5.44
5.91
5.64
5.3
4.38
3.23
2.21
1.66
3.84
FL
Miami
25' 48" N
80' 16" W
3.72
4.61
5.42
6.4
6.61
6.29
6.26
6.08
5.47
4.84
3.96
3.46
5.26
GA
Atlanta
33' 39" N
84' 26" W
2.31
3.37
4.08
5.2
6.02
6.01
5.81
5.59
4.76
3.95
2.98
2.33
4.37
HI
Honolulu
21' 20" N
157' 55" W
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
42' 24" N
90' 42" W
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
43' 34" N
116' 13" W
1.73
2.72
3.77
5.22
5.9
6.57
7.17
6.12
5.28
3.29
1.74
1.46
4.24
IN
Indianapolis
39' 44" N
86' 17" W
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
41' 53" N
87' 38" W
1.5
2.45
3.2
4.48
5.56
6.07
5.68
5.27
4.51
3.07
1.69
1.26
3.72
KS
Kansas City
39' 12" N
94' 36" W
2.06
2.89
3.62
4.92
5.58
6.17
6.21
5.59
4.9
3.49
2.2
1.75
4.11
KY
Louisville
38' 11" N
85' 44" W
1.71
2.65
3.32
4.73
5.38
6.08
5.79
5.35
4.8
3.42
2.1
1.56
3.9
LA
New Orleans
29' 37" N
90' 5" W
2.64
3.73
4.67
5.8
6.6
6.15
6.09
5.7
5.13
4.48
3.49
2.68
4.76
MA
Boston
42' 22" N
71' 2" W
1.66
2.5
3.51
4.13
5.11
5.47
5.44
5.05
4.12
2.84
1.74
1.4
3.58
MD
Annapolis
38' 35" N
76' 21" W
1.96
2.8
3.71
4.55
5.54
6.03
5.77
5.34
4.48
3.4
2.37
1.81
3.98
ME
Portland
45' 36" N
122' 36" W
1.38
2.33
3.49
4.57
5.46
6.09
6.64
5.78
4.8
2.79
1.41
1.1
3.82
MI
Detroit
42' 25" N
83' 1" W
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
38' 45" N
90' 23" W
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
44' 53" N
93' 13" W
1.6
2.61
3.3
4.55
5.44
5.86
5.77
5.12
4.12
2.9
1.62
1.34
3.68
MS
Jackson
42' 16" N
84' 28" W
1.47
2.41
3.22
4.33
5.46
5.93
5.57
4.99
4.3
2.78
1.55
1.17
3.59
MT
Billings
45' 48" N
108' 32" W
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
43' 33" N
96' 42" W
1.3
2.36
3.41
4.84
5.56
6.18
6.44
5.53
4.4
2.9
1.53
1.11
3.79
NC
Charlotte
35' 13" N
80' 56" W
2.22
3.17
3.95
4.98
5.8
6.01
5.76
5.27
4.58
3.75
2.76
2.21
4.2
ND
Fargo
46' 54" N
96' 48" W
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
41' 18" N
95' 54" W
1.92
2.76
3.45
4.74
5.6
6.14
6.11
5.46
4.74
3.34
2
1.57
3.98
NH
Manchester
42' 56" N
71' 26" W
1.66
2.5
3.51
4.13
5.11
5.47
5.44
5.05
4.12
2.84
1.74
1.4
3.58
NJ
Trenton
40' 13" N
74' 46" W
1.71
2.39
3.43
4.04
5.26
5.67
5.39
5.14
4.18
3
1.98
1.48
3.63
NM
Albuquerque
35' 3" N
106' 37" W
2.92
3.97
4.92
6.3
6.68
6.94
6.66
5.8
5.68
4.18
3.16
2.5
4.97
NV
Las Vegas
36' 18" N
115' 16" W
3.02
4.13
5.05
6.57
7.25
7.69
7.37
6.42
6.08
4.26
3.18
2.6
5.3
NY
New York
41' N
74' W
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
39' 16" N
85' 54" W
1.64
2.57
3.26
4.63
5.4
6.08
5.73
5.29
4.74
3.29
1.96
1.45
3.83
OK
Tulsa
36' 12" N
95' 54" W
2.33
3.22
3.9
5.25
5.58
6.32
6.4
5.8
5.08
3.8
2.62
2.06
4.36
OR
Portland
45' 32" N
122' 40" W
1.38
2.33
3.49
4.57
5.46
6.09
6.64
5.78
4.8
2.79
1.41
1.1
3.82
PA
Philadelphia
39' 53" N
75' 15" W
1.85
2.62
3.6
4.33
5.44
5.91
5.64
5.3
4.38
3.23
2.21
1.66
3.84
PA
Pittsburgh
40' 27" N
79' 57" W
1.59
2.4
3.26
4.07
5.05
5.53
5.27
4.94
4.05
2.88
1.86
1.41
3.53
RI
Providence
41' 44" N
71' 26" W
1.7
2.46
3.53
4.2
5.17
5.67
5.48
5.08
4.21
2.97
1.8
1.43
3.64
SC
Columbia
38' 58" N
92' 22" W
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
45' 27" N
98' 25" W
1.72
2.71
3.31
4.65
5.61
6.1
6.04
5.42
4.47
3.2
1.78
1.43
3.87
TN
Nashville
36' 7" N
86' 41" W
1.94
2.9
3.54
4.76
5.57
5.9
5.86
5.62
4.63
3.53
2.45
1.82
4.04
TX
San Antonio
29' 32" N
98' 28" W
2.57
3.7
4.43
5.54
5.94
6.62
6.49
6.28
5.7
4.67
3.43
2.62
4.83
TX
Houston
29' 59" N
95' 22" W
2.47
3.5
4.4
5.59
6.03
6.45
6.36
6.07
5.46
4.61
3.3
2.44
4.72
UT
Salt Lake City
40' 46" N
111" 52" W
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
38' 51" N
77' 2" W
1.95
2.8
3.66
4.46
5.42
5.88
5.63
5.22
4.38
3.36
2.34
1.79
3.9
VT
Montpelier
44' 16" N
72' 35" W
1.58
2.54
3.5
4.05
5
5.24
5.37
4.92
3.79
2.46
1.52
1.28
3.43
WA
Seattle
47' 32" N
122' 18" W
1.14
2.04
3.23
4.26
5.19
5.75
6.27
5.46
4.43
2.5
1.21
0.9
3.53
WI
Milwaukee
42' 57" N
87' 54" W
1.43
2.41
3.29
4.48
5.6
6.09
5.74
5.21
4.34
2.9
1.6
1.2
3.69
WV
Charleston
38' 22" N
81' 36" W
1.75
2.64
3.34
4.26
5.2
5.67
5.49
5.19
4.26
3.19
2.15
1.62
3.73
WY
Casper
42' 55" N
106' 28" W
1.93
2.8
3.79
5.13
5.9
6.68
6.5
5.9
5.13
3.59
2.06
1.65
4.25
Data courtesy of: NASA - Surface meteorology and Solar Energy Data Set
Reference:
Whitlock, C. E., et al., Release 3 NASA Surface Meteorology and
Solar Energy Data Set for Renewable Energy Industry Use.
Rise & Shine 2000, the 26th Annual Conference of the Solar
Energy Society of Canada Inc. and Solar, Oct. 21-24, 2000,
Halifax, Nova Scotia, Canada.

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