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Unalaska, Alaska Climate Averages

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Unalaska Monthly Climate Averages

January
February
March
April
May
June
July
August
September
October
November
December
Hi 34°F Lo 31°F Hi 36°F Lo 32°F Hi 35°F Lo 31°F Hi 38°F Lo 33°F Hi 42°F Lo 38°F Hi 46°F Lo 42°F Hi 50°F Lo 47°F Hi 53°F Lo 50°F Hi 50°F Lo 47°F Hi 45°F Lo 43°F Hi 40°F Lo 37°F Hi 37°F Lo 34°F
16 mph 15 mph 15 mph 14 mph 11 mph 9 mph 9 mph 9 mph 13 mph 16 mph 17 mph 17 mph
6.8 in 5.9 in 4.7 in 5.1 in 4.6 in 4.2 in 4.1 in 5.4 in 6.3 in 6.8 in 6.5 in 7.8 in
81% 83% 80% 83% 86% 88% 91% 90% 86% 81% 79% 80%
72% 70% 68% 72% 68% 68% 72% 67% 65% 63% 66% 70%
29.5 in 29.6 in 29.8 in 29.7 in 29.8 in 29.9 in 30.0 in 29.9 in 29.8 in 29.7 in 29.7 in 29.5 in
3 3 7 4 16 22 22 21 20 17 9 4
12 10 9 11 11 8 9 10 10 12 12 12
18 17 17 16 5 0 0 0 0 2 10 17
0 0 0 0 0 0 1 1 0 0 0 0
1 1 1 1 2 2 3 3 2 2 1 1
158 155 178 163 179 167 164 193 194 217 192 171
January
February
March
April
May
June
July
August
September
October
November
December
Hi 1°C Lo -1°C Hi 2°C Lo -0°C Hi 2°C Lo -1°C Hi 3°C Lo 1°C Hi 5°C Lo 3°C Hi 8°C Lo 6°C Hi 10°C Lo 8°C Hi 12°C Lo 10°C Hi 10°C Lo 9°C Hi 7°C Lo 6°C Hi 5°C Lo 3°C Hi 3°C Lo 1°C
26 km/h 25 km/h 24 km/h 23 km/h 17 km/h 15 km/h 14 km/h 15 km/h 21 km/h 25 km/h 27 km/h 27 km/h
173 mm 151 mm 119 mm 130 mm 118 mm 106 mm 104 mm 138 mm 159 mm 173 mm 165 mm 198 mm
81% 83% 80% 83% 86% 88% 91% 90% 86% 81% 79% 80%
72% 70% 68% 72% 68% 68% 72% 67% 65% 63% 66% 70%
999 mb 1004 mb 1009 mb 1007 mb 1011 mb 1012 mb 1015 mb 1013 mb 1009 mb 1004 mb 1006 mb 1000 mb
3 3 7 4 16 22 22 21 20 17 9 4
12 10 9 11 11 8 9 10 10 12 12 12
18 17 17 16 5 0 0 0 0 2 10 17
0 0 0 0 0 0 1 1 0 0 0 0
1 1 1 1 2 2 3 3 2 2 1 1
158 155 178 163 179 167 164 193 194 217 192 171
Month
Avg. Temperatures
Avg. Wind Speed
Avg. Precipitation
Average Humidity
Avg. Cloud Cover
Pressure Average
Average Dry Days
Avg. Precip. Days
Avg. Snow Days
Average Fog Days
Average UV Index
Avg. Hours of Sun
Averages are based on historical weather data from the past 10 years.

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