Unalaska, AK Weather

Unalaska, AK climate is cool during summer when temperatures tend to be in the 50's and very cold during winter when temperatures tend to be in the 30's.

The warmest month of the year is August with an average maximum temperature of 9.99 degrees Fahrenheit, while the coldest month of the year is February with an average minimum temperature of 9.99 degrees Fahrenheit.

Temperature variations between night and day tend to be fairly limited during summer with a difference that can reach 12 degrees Fahrenheit, and fairly limited during winter with an average difference of 11 degrees Fahrenheit.

The annual average precipitation at Unalaska is 9.99 Inches. Winter months tend to be wetter than summer months. The wettest month of the year is December with an average rainfall of 6.79 Inches.

Weather Data

Normal Climate

Normal Temperatures

(DUTCH HARBOR Weather station, 1.84 miles from Unalaska)

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Annual
Max °F	36.6	36.6	38.3	40.6	45.5	51.2	56.9	58.6	54.1	47.5	42.6	38.3	45.6
Mean °F	31.5	31.2	32.7	35.4	40.7	45.8	50.9	52.5	48.2	42.0	37.1	33.5	40.1
Min °F	26.4	25.8	27.1	30.2	35.9	40.4	44.8	46.3	42.2	36.4	31.6	28.6	34.6

Normal Precipitation