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Monthly climate in Nikiski, Alaska, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Nikiski features a subarctic climate (Dsc).Temperatures typically range between -4 °C (25 °F) and 14 °C (58 °F) through the year, but rarely can drop to -14 °C (7 °F) or can rise to as high as 22 °C (72 °F).The average annual precipitation amounts to about 970 mm (38.2 inches) and receives 143 rainy days on the 1 mm (0.04 inches) threshold annually.Nikiski enjoys an average of 2357 hours of sunshine throughout the year, and daylight varies from 5 hours 46 minutes to 18 hours 57 minutes per day.

Monthly average temperatures in Nikiski, Alaska, United States §

The warmest months in Nikiski are July, August and September, with daily mean temperatures ranging from 11 to 14 °C (53 - 58 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -2 °C (25 - 29 °F) throughout the day. On average each year, Nikiski experiences 0 days above 25 °C (77.0 °F) and 117 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Nikiski, 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 5°C
(41°F)		 4°C
(39°F)		 5°C
(41°F)		 8°C
(47°F)		 15°C
(60°F)		 19°C
(66°F)		 22°C
(72°F)		 20°C
(69°F)		 17°C
(63°F)		 13°C
(55°F)		 7°C
(45°F)		 6°C
(42°F)
Mean maximum 4°C
(40°F)		 3°C
(37°F)		 3°C
(38°F)		 7°C
(45°F)		 13°C
(55°F)		 15°C
(60°F)		 19°C
(66°F)		 19°C
(66°F)		 16°C
(60°F)		 11°C
(52°F)		 6°C
(43°F)		 5°C
(41°F)
Average high -3°C
(27°F)		 -2°C
(30°F)		 -0°C
(32°F)		 4°C
(39°F)		 8°C
(47°F)		 12°C
(54°F)		 15°C
(60°F)		 15°C
(60°F)		 13°C
(55°F)		 7°C
(46°F)		 1°C
(34°F)		 -0°C
(31°F)
Daily mean -4°C
(25°F)		 -3°C
(27°F)		 -2°C
(29°F)		 2°C
(36°F)		 7°C
(44°F)		 11°C
(52°F)		 14°C
(57°F)		 14°C
(58°F)		 11°C
(53°F)		 6°C
(44°F)		 0°C
(32°F)		 -2°C
(29°F)
Average low -5°C
(23°F)		 -4°C
(25°F)		 -3°C
(27°F)		 0°C
(33°F)		 5°C
(42°F)		 9°C
(49°F)		 13°C
(55°F)		 13°C
(56°F)		 10°C
(51°F)		 6°C
(42°F)		 -1°C
(31°F)		 -3°C
(27°F)
Mean minimum -12°C
(10°F)		 -9°C
(16°F)		 -7°C
(19°F)		 -4°C
(25°F)		 2°C
(36°F)		 8°C
(46°F)		 11°C
(51°F)		 11°C
(52°F)		 8°C
(46°F)		 0°C
(33°F)		 -6°C
(21°F)		 -10°C
(15°F)
Minimum -14°C
(7°F)		 -11°C
(12°F)		 -10°C
(13°F)		 -10°C
(14°F)		 1°C
(34°F)		 7°C
(44°F)		 10°C
(50°F)		 9°C
(49°F)		 4°C
(40°F)		 -2°C
(29°F)		 -12°C
(11°F)		 -14°C
(7°F)

Compare climate in Nikiski with other places

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

Monthly average precipitation in Nikiski, Alaska, United States §

Nikiski usually has the most precipitation in September, October and December, with an average of 17 rainy days and 132 mm (5.2 inches) of precipitation per month.The driest months in Nikiski are March, April and June. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nikiski, 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) 53 (2.1) 59 (2.3) 41 (1.6) 39 (1.6) 63 (2.5) 43 (1.7) 77 (3.0) 97 (3.8) 137 (5.4) 150 (5.9) 101 (4.0) 109 (4.3)
Average precipitation days (≥ 1 mm) 10 11 8 8 13 8 10 12 17 17 12 17

Monthly sunshine hours in Nikiski, Alaska, United States §

The sunniest months in Nikiski are May, June and July, when the sun shines an average of 10 hours 17 minutes a day.Least sunny months in Nikiski: January, November and December receive an average of 2 hours 5 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nikiski, 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 58 123 216 262 289 349 308 288 196 130 95 39
Mean daily daylight hours 6h 39m 9h 6m 11h 54m 14h 45m 17h 24m 18h 57m 18h 4m 15h 33m 12h 46m 9h 57m 7h 18m 5h 46m

Solar UV radiation in Nikiski, Alaska, United States §

Nikiski experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 5 - 6, which corresponds to the Moderate / High category of sun exposure.January, February and November 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 Nikiski UV Index data.

Average daily maximum UV levels by month for Nikiski, 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 1 2 4 5 6 6 5 4 2 1 1