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Climate & Weather Averages in Unalaska, Alaska, USA

Currently: 47 °F. Partly sunny. (Weather station: Dutch Harbor, USA). See more current weather

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

Quick Climate Info

Hottest MonthAugust (54 °F avg)
Coldest MonthJanuary (33 °F avg)
Wettest MonthOctober (7.75" avg)
Windiest MonthNovember (24 mph avg)
Annual precip.58.47" (per year)

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