Mean monthly frequency (%) of clear and overcast sky conditions (sunrise to sunset observations).
63° 53'N / 160° 48' W
15.1 ft. above sea level
midnight - midnight
sunrise - sunset
Analyses are based on hourly observations for the years 1971 - 1994.
Clear skies are defined as 0 to 0.30 coverage, partly cloudy 0.40 to 0.70, and cloudy skies 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 |
38
|
44
|
42
|
32
|
20
|
23
|
9
|
13
|
14
|
22
|
29
|
28
|
| Partly Cloudy |
10
|
9
|
11
|
11
|
13
|
12
|
11
|
9
|
11
|
8
|
9
|
10
|
| Cloudy |
52
|
46
|
47
|
57
|
67
|
65
|
79
|
78
|
75
|
69
|
63
|
62
|
|
Mean Cloudiness
|
0.57
|
0.51
|
0.53
|
0.63
|
0.73
|
0.71
|
0.84
|
0.82
|
0.80
|
0.73
|
0.67
|
0.66
|