Annual Weather Averages in Unalaska
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Unalaska
High Temp: 59 °F
Low Temp: 29 °F
Mean Temp: 42 °F
Precipitation: 4.87"
Humidity: 76%
Dew Point: 34 °F
Wind: 20 mph
Pressure: 29.75 "Hg
Visibility: 9 mi
January Climate & Weather Averages in Unalaska
High Temp: 37 °F
Low Temp: 29 °F
Mean Temp: 33 °F
Precipitation: 6.45"
Humidity: 75%
Dew Point: 27 °F
Wind: 23 mph
Pressure: 29.53 "Hg
Visibility: 8 mi
February Climate & Weather Averages in Unalaska
High Temp: 39 °F
Low Temp: 30 °F
Mean Temp: 35 °F
Precipitation: 5.04"
Humidity: 75%
Dew Point: 28 °F
Wind: 23 mph
Pressure: 29.61 "Hg
Visibility: 8 mi
March Climate & Weather Averages in Unalaska
High Temp: 39 °F
Low Temp: 30 °F
Mean Temp: 34 °F
Precipitation: 4.60"
Humidity: 74%
Dew Point: 27 °F
Wind: 22 mph
Pressure: 29.77 "Hg
Visibility: 8 mi
April Climate & Weather Averages in Unalaska
High Temp: 42 °F
Low Temp: 33 °F
Mean Temp: 37 °F
Precipitation: 3.45"
Humidity: 75%
Dew Point: 30 °F
Wind: 22 mph
Pressure: 29.76 "Hg
Visibility: 9 mi
May Climate & Weather Averages in Unalaska
High Temp: 47 °F
Low Temp: 38 °F
Mean Temp: 42 °F
Precipitation: 3.89"
Humidity: 77%
Dew Point: 34 °F
Wind: 18 mph
Pressure: 29.86 "Hg
Visibility: 9 mi
June Climate & Weather Averages in Unalaska
High Temp: 52 °F
Low Temp: 43 °F
Mean Temp: 47 °F
Precipitation: 2.48"
Humidity: 79%
Dew Point: 40 °F
Wind: 16 mph
Pressure: 29.90 "Hg
Visibility: 9 mi
July Climate & Weather Averages in Unalaska
High Temp: 57 °F
Low Temp: 47 °F
Mean Temp: 52 °F
Precipitation: 2.28"
Humidity: 82%
Dew Point: 45 °F
Wind: 14 mph
Pressure: 29.98 "Hg
Visibility: 9 mi
August Climate & Weather Averages in Unalaska
High Temp: 59 °F
Low Temp: 48 °F
Mean Temp: 54 °F
Precipitation: 2.98"
Humidity: 80%
Dew Point: 47 °F
Wind: 15 mph
Pressure: 29.95 "Hg
Visibility: 9 mi
September Climate & Weather Averages in Unalaska
High Temp: 54 °F
Low Temp: 45 °F
Mean Temp: 49 °F
Precipitation: 5.42"
Humidity: 76%
Dew Point: 42 °F
Wind: 20 mph
Pressure: 29.80 "Hg
Visibility: 9 mi
October Climate & Weather Averages in Unalaska
High Temp: 48 °F
Low Temp: 39 °F
Mean Temp: 43 °F
Precipitation: 7.75"
Humidity: 73%
Dew Point: 35 °F
Wind: 23 mph
Pressure: 29.68 "Hg
Visibility: 9 mi
November Climate & Weather Averages in Unalaska
High Temp: 43 °F
Low Temp: 34 °F
Mean Temp: 38 °F
Precipitation: 6.46"
Humidity: 73%
Dew Point: 31 °F
Wind: 24 mph
Pressure: 29.67 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Unalaska
High Temp: 39 °F
Low Temp: 31 °F
Mean Temp: 35 °F
Precipitation: 7.67"
Humidity: 74%
Dew Point: 28 °F
Wind: 23 mph
Pressure: 29.51 "Hg
Visibility: 8 mi