Mean monthly frequency (%) of clear and overcast sky conditions (sunrise to sunset observations).
60° 47'N / 161° 50' W
102.0 ft. above sea level
midnight - midnight
sunrise - sunset
Analyses are based on hourly observations for the years 1971 - 1996.
Clear skies are defined as 0 to 0.30 coverage and cloudy skies are 0.80 to 1.00.
Mean monthly frequency (%) of clear, partly cloudy, and cloudy sky condition and mean cloudiness (fraction of sky coverage).
| Sky Condition |
Jan
|
Feb
|
Mar
|
Apr
|
May
|
Jun
|
Jul
|
Aug
|
Sep
|
Oct
|
Nov
|
Dec
|
| Clear |
29
|
40
|
35
|
28
|
17
|
11
|
9
|
8
|
9
|
17
|
25
|
22
|
| Partly Cloudy |
11
|
10
|
11
|
13
|
15
|
17
|
13
|
10
|
13
|
12
|
10
|
12
|
| Cloudy |
59
|
50
|
54
|
59
|
68
|
72
|
77
|
82
|
78
|
71
|
65
|
66
|
|
Mean Cloudiness
|
0.66
|
0.56
|
0.60
|
0.66
|
0.76
|
0.81
|
0.84
|
0.87
|
0.84
|
0.77
|
0.71
|
0.73
|