Monthly Averaged Insolation Incident On A Horizontal Surface (kWh/m²/day)

Lat 57.5
Lon 18.5

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual
Average

10-year Average

0.48

1.13

2.40

4.29

6.02

6.18

6.02

4.73

3.17

1.63

0.69

0.27

3.09

Monthly Averaged Daylight (hours)

Lat 57.5
Lon 18.5

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Average

7.41

9.53

11.8

14.3

16.5

17.9

17.2

15.2

12.8

10.4

8.11

6.76

Monthly Averaged Maximum Solar Angle Relative To The Horizon (degrees)

Lat 57.5
Lon 18.5

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Average

11.7

20.1

30.6

42.2

51.3

55.5

53.7

46.2

35.5

24.0

14.3

9.60

Monthly Averaged Radiation Incident On An Equator-Pointed Tilted Surface / Perez/Page Method (kWh/m²/day)

Lat 57.5
Lon 18.5

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual
Average

SSE HRZ

0.48

1.13

2.40

4.29

6.02

6.18

6.02

4.73

3.17

1.63

0.69

0.27

3.09

K

0.35

0.40

0.46

0.53

0.58

0.54

0.55

0.53

0.50

0.44

0.39

0.27

0.46

PAGE DIF

0.30

0.66

1.27

1.95

2.46

2.79

2.64

2.18

1.54

0.89

0.41

0.19

1.44

PAGE DNR

1.23

2.01

3.23

5.15

6.97

6.47

6.51

5.30

4.16

2.72

1.67

0.65

3.85

Tilt 0

0.48

1.13

2.38

4.26

6.04

6.26

6.08

4.73

3.11

1.60

0.69

0.26

3.10

Tilt 42

1.43

2.32

3.69

5.69

6.70

6.40

6.43

5.79

4.67

2.95

1.92

0.76

4.07

Tilt 57

1.63

2.52

3.81

5.57

6.24

5.86

5.94

5.55

4.74

3.14

2.17

0.86

4.01

Tilt 72

1.73

2.58

3.71

5.14

5.48

5.06

5.18

5.02

4.53

3.14

2.28

0.91

3.73

Tilt 90

1.72

2.45

3.32

4.25

4.19

3.74

3.89

4.03

3.92

2.89

2.22

0.90

3.13

OPT

1.74

2.58

3.81

5.69

6.81

6.66

6.63

5.80

4.75

3.16

2.28

0.92

4.24

OPT ANG

79.0

70.0

57.0

44.0

30.0

24.0

27.0

39.0

53.0

65.0

76.0

79.0

53.4