Unalaska (AK) monthly weather averages

Contents

Average daytime temperature

The bar chart below shows the average monthly peak daytime temperatures at Unalaska

Unalaska average temperature chart (Celsius) Unalaska average temperature chart (Fahrenheit)
Average monthly temperatures in Unalaska (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 1.6 0.4 1.4 2.7 5.7 8.8 10.9 11.9 10.5 7.1 4.5 2.9
°F 34.9 32.7 34.6 36.9 42.3 47.8 51.6 53.4 51 44.8 40.2 37.3

Please note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. To see the daily range of temperatures have a look at the temperature max / min chart below.

Average rainfall & rainy days

The graph below shows the average rainfall and number of rainy days per month.

Unalaska monthly rainfall chart (mm) Unalaska monthly rainfall chart (inches)
Average monthly rainfall in Unalaska (mm and inches)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 77 60 61 53 54 50 61 84 100 104 109 94
inches 3 2.3 2.4 2.1 2.1 2 2.4 3.3 3.9 4.1 4.3 3.7
Rainy days 19 17 18 18 17 16 17 20 21 23 22 21

Average annual rainfall in Unalaska: 794.434mm (312.8 inches)

Average daily sunshine

The bar chart below shows the average daily sunshine hours in Unalaska

Unalaska average daily sunshine chart
Average daily sunshine Unalaska
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hrs sunshine 6.5 7.6 8 8 8.5 8.2 7.7 7.4 7.2 6.3 5.8 6

Day / night temperatures

The graph below shows the daily range of temperatures for each month.

Unalaska average minimum / maximum temperatures (Celsius) Unalaska average minimum / maximum temperatures (Fahrenheit)
Maximum and minimum daily temperatures in Unalaska (degrees centigrade and fahrenheit)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C -3 -4.3 -3.6 -1.9 1.2 3.9 6.6 7.8 6 2.4 -0.1 -1.7
Max °C 1.8 0.5 1.6 2.9 5.9 8.9 11 12 10.7 7.3 4.7 3.1
Min °F 26.7 24.3 25.6 28.7 34.1 39 43.9 46 42.7 36.2 31.9 29
Max °F 30.9 28.6 30.2 32.9 38.3 43.5 47.8 49.8 46.9 40.6 36.1 33.3

Sea temperature

The graph below shows the average sea temperature.

Unalaska average sea temperature chart (Celsius) Unalaska average sea temperature chart (Fahrenheit)
Average sea temperature around Unalaska in degrees centigrade and fahrenheit
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 4.5 4 4 4.3 5.4 7.1 9 10.3 9.9 8.3 6.7 5.5
°F 40.1 39.2 39.1 39.7 41.7 44.8 48.1 50.6 49.8 47 44.1 41.9

Wind speed

The graph below shows the average wind speed.

Unalaska average winspeed by month (km/h) Unalaska average winspeed by month (mph)
Average wind speed in Unalaska (mph and kmh)
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
km/h 28 29 27 27 24 23 22 23 24 26 27 28
mph 18 18 17 17 15 14 14 14 15 16 17 17

A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.

Relative humidity

The graph below shows the average relative humidity.

Unalaska relative humidity averages
Average relative humidity in Unalaska
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
83% 83% 83% 83% 85% 87% 90% 90% 87% 83% 83% 84%

Other monthly averages

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Beta

Current (hourly) weather 15 day forecast

Unalaska weather stats

Unalaska weather statistics
Hottest month: August 11.9°C 53.4°F
Driest month: June 50mm 2ins
Sunniest month: February 7.6hrs
Coldest month: February 0.4°C 32.7°F
Wettest month: November 109mm 4.3ins
Warmest sea: August 10.3°C 50.5°F
Map showing location of Unalaska (53.87361, -166.53667) Unalaska map pin © Google

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