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Monthly climate in Sitka, Alaska, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Sitka features a subarctic climate (Dfc).Temperatures typically range between 0 °C (32 °F) and 13 °C (56 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 25 °C (77 °F).The average annual precipitation amounts to about 2401 mm (94.5 inches) and receives 227 rainy days on the 1 mm (0.04 inches) threshold annually.Sitka enjoys an average of 1840 hours of sunshine throughout the year, and daylight varies from 6 hours 47 minutes to 17 hours 46 minutes per day.

Monthly average temperatures in Sitka, Alaska, United States §

The warmest months in Sitka are July, August and September, with daily mean temperatures ranging from 11 to 13 °C (52 - 56 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 0 to 1 °C (32 - 35 °F) throughout the day. On average each year, Sitka experiences 0 days above 25 °C (77.0 °F) and 71 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sitka, 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 13°C
(56°F)		 9°C
(48°F)		 11°C
(52°F)		 14°C
(57°F)		 20°C
(68°F)		 21°C
(71°F)		 22°C
(72°F)		 25°C
(77°F)		 21°C
(70°F)		 16°C
(60°F)		 12°C
(54°F)		 10°C
(50°F)
Mean maximum 8°C
(47°F)		 6°C
(43°F)		 7°C
(46°F)		 11°C
(52°F)		 16°C
(60°F)		 18°C
(65°F)		 20°C
(68°F)		 20°C
(68°F)		 17°C
(64°F)		 13°C
(55°F)		 10°C
(50°F)		 8°C
(47°F)
Average high 2°C
(36°F)		 2°C
(35°F)		 3°C
(38°F)		 6°C
(44°F)		 10°C
(50°F)		 12°C
(54°F)		 15°C
(59°F)		 15°C
(59°F)		 13°C
(56°F)		 9°C
(48°F)		 5°C
(42°F)		 4°C
(39°F)
Daily mean 1°C
(33°F)		 -0°C
(32°F)		 1°C
(35°F)		 4°C
(40°F)		 8°C
(46°F)		 10°C
(51°F)		 13°C
(55°F)		 13°C
(56°F)		 11°C
(52°F)		 7°C
(45°F)		 4°C
(39°F)		 2°C
(36°F)
Average low -1°C
(30°F)		 -2°C
(28°F)		 -0°C
(31°F)		 2°C
(36°F)		 6°C
(42°F)		 9°C
(48°F)		 11°C
(52°F)		 11°C
(53°F)		 9°C
(49°F)		 5°C
(42°F)		 2°C
(36°F)		 1°C
(33°F)
Mean minimum -11°C
(12°F)		 -11°C
(13°F)		 -7°C
(20°F)		 -2°C
(28°F)		 2°C
(36°F)		 6°C
(43°F)		 9°C
(49°F)		 9°C
(48°F)		 6°C
(43°F)		 1°C
(33°F)		 -4°C
(26°F)		 -6°C
(21°F)
Minimum -17°C
(2°F)		 -16°C
(4°F)		 -13°C
(9°F)		 -6°C
(21°F)		 1°C
(35°F)		 4°C
(40°F)		 9°C
(48°F)		 7°C
(45°F)		 5°C
(42°F)		 -3°C
(28°F)		 -6°C
(21°F)		 -14°C
(7°F)

Compare climate in Sitka with other places

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

Monthly average precipitation in Sitka, Alaska, United States §

Sitka usually has the most precipitation in October, November and December, with an average of 22 rainy days and 284 mm (11.2 inches) of precipitation per month.The driest months in Sitka are May, June and July. On average, 124 mm (4.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sitka, 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) 219 (8.6) 179 (7.0) 179 (7.0) 174 (6.9) 124 (4.9) 137 (5.4) 112 (4.4) 201 (7.9) 224 (8.8) 276 (10.9) 284 (11.2) 293 (11.5)
Average precipitation days (≥ 1 mm) 18 15 18 18 19 20 15 20 17 22 23 22

Monthly sunshine hours in Sitka, Alaska, United States §

The sunniest months in Sitka are May, June and July, when the sun shines an average of 7 hours 11 minutes a day.Least sunny months in Sitka: January, November and December receive an average of 1 hours 44 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sitka, 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 43 128 177 195 220 222 219 211 184 120 64 51
Mean daily daylight hours 7h 29m 9h 30m 11h 54m 14h 22m 16h 34m 17h 46m 17h 5m 15h 3m 12h 40m 10h 14m 8h 1m 6h 47m

Solar UV radiation in Sitka, Alaska, United States §

Sitka experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 6 - 7, which corresponds to the High category of sun exposure.January, November and December are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 1. For more detailed information, check out our hourly Sitka UV Index data.

Average daily maximum UV levels by month for Sitka, 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 4 5 6 6 7 7 5 3 1 1