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Monthly climate in Dutch Harbor, Alaska, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Dutch Harbor features a ice cap climate ET).Temperatures typically range between 0 °C (33 °F) and 10 °C (51 °F) through the year, but rarely can drop to -10 °C (15 °F) or can rise to as high as 17 °C (62 °F).The average annual precipitation amounts to about 1196 mm (47.1 inches) and receives 214 rainy days on the 1 mm (0.04 inches) threshold annually.Dutch Harbor enjoys an average of 1902 hours of sunshine throughout the year, and daylight varies from 7 hours 28 minutes to 17 hours 0 minutes per day.

Monthly average temperatures in Dutch Harbor, Alaska, United States §

The warmest months in Dutch Harbor are July, August and September, with daily mean temperatures ranging from 9 to 10 °C (48 - 51 °F) throughout the day. The coldest temperatures usually occur in January, March and December, when daily mean temperatures range from 0 to 2 °C (33 - 35 °F) throughout the day. On average each year, Dutch Harbor experiences 0 days above 25 °C (77.0 °F) and 63 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Dutch Harbor, Alaska, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 6°C
(44°F)		 7°C
(44°F)		 7°C
(44°F)		 8°C
(46°F)		 9°C
(49°F)		 11°C
(51°F)		 15°C
(60°F)		 17°C
(62°F)		 14°C
(57°F)		 12°C
(54°F)		 9°C
(49°F)		 9°C
(48°F)
Mean maximum 5°C
(42°F)		 6°C
(43°F)		 5°C
(41°F)		 6°C
(44°F)		 8°C
(47°F)		 9°C
(49°F)		 14°C
(58°F)		 15°C
(59°F)		 12°C
(55°F)		 11°C
(52°F)		 8°C
(46°F)		 7°C
(46°F)
Average high 1°C
(35°F)		 3°C
(37°F)		 2°C
(36°F)		 4°C
(39°F)		 6°C
(42°F)		 8°C
(47°F)		 10°C
(51°F)		 12°C
(53°F)		 10°C
(50°F)		 7°C
(46°F)		 5°C
(41°F)		 3°C
(37°F)
Daily mean 0°C
(33°F)		 2°C
(35°F)		 1°C
(34°F)		 2°C
(37°F)		 4°C
(40°F)		 7°C
(45°F)		 9°C
(49°F)		 10°C
(51°F)		 9°C
(48°F)		 6°C
(43°F)		 4°C
(39°F)		 2°C
(35°F)
Average low -1°C
(31°F)		 1°C
(33°F)		 -0°C
(32°F)		 1°C
(35°F)		 3°C
(38°F)		 6°C
(43°F)		 8°C
(47°F)		 9°C
(49°F)		 8°C
(46°F)		 5°C
(41°F)		 3°C
(37°F)		 0°C
(32°F)
Mean minimum -5°C
(24°F)		 -4°C
(24°F)		 -4°C
(25°F)		 -3°C
(27°F)		 1°C
(34°F)		 4°C
(40°F)		 7°C
(44°F)		 7°C
(46°F)		 5°C
(42°F)		 2°C
(35°F)		 -1°C
(30°F)		 -5°C
(23°F)
Minimum -8°C
(18°F)		 -10°C
(15°F)		 -6°C
(22°F)		 -6°C
(22°F)		 -0°C
(32°F)		 3°C
(37°F)		 6°C
(43°F)		 6°C
(43°F)		 5°C
(40°F)		 -0°C
(32°F)		 -6°C
(21°F)		 -8°C
(19°F)

Compare climate in Dutch Harbor with other places

Compare temperature, precipitation, sunshine, UV index in Dutch Harbor, Alaska, United States with other places around the world.

Monthly average precipitation in Dutch Harbor, Alaska, United States §

Dutch Harbor usually has the most precipitation in October, November and December, with an average of 22 rainy days and 138 mm (5.4 inches) of precipitation per month.The driest months in Dutch Harbor are March, April and July. On average, 72 mm (2.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Dutch Harbor, Alaska, United States.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 90 (3.5) 119 (4.7) 80 (3.1) 78 (3.1) 88 (3.5) 83 (3.3) 58 (2.3) 81 (3.2) 106 (4.2) 141 (5.6) 119 (4.7) 154 (6.1)
Average precipitation days (≥ 1 mm) 17 19 14 20 20 13 12 14 18 23 21 23

Monthly sunshine hours in Dutch Harbor, Alaska, United States §

The sunniest months in Dutch Harbor are May, June and August, when the sun shines an average of 7 hours 0 minutes a day.Least sunny months in Dutch Harbor: January, November and December receive an average of 2 hours 42 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Dutch Harbor, Alaska, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 72 100 174 190 240 205 185 199 187 171 96 79
Mean daily daylight hours 8h 3m 9h 48m 11h 56m 14h 6m 16h 0m 17h 0m 16h 26m 14h 42m 12h 35m 10h 26m 8h 30m 7h 28m

Solar UV radiation in Dutch Harbor, Alaska, United States §

Dutch Harbor experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 7 - 8, which corresponds to the High / Very High category of sun exposure.January, February and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 2. For more detailed information, check out our hourly Dutch Harbor UV Index data.

Average daily maximum UV levels by month for Dutch Harbor, Alaska, United States.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 1 2 3 5 6 7 8 8 5 3 2 1