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Monthly climate in Willow, Alaska, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Willow features a subarctic climate (Dfc).Temperatures typically range between -12 °C (10 °F) and 16 °C (62 °F) through the year, but rarely can drop to -35 °C (-31 °F) or can rise to as high as 31 °C (88 °F).The average annual precipitation amounts to about 902 mm (35.5 inches) and receives 167 rainy days on the 1 mm (0.04 inches) threshold annually.Willow enjoys an average of 2326 hours of sunshine throughout the year, and daylight varies from 5 hours 23 minutes to 19 hours 25 minutes per day.

Monthly average temperatures in Willow, Alaska, United States §

The warmest months in Willow are June, July and August, with daily mean temperatures ranging from 14 to 16 °C (57 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -12 to -8 °C (10 - 17 °F) throughout the day. On average each year, Willow experiences 4 days above 25 °C (77.0 °F) and 176 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Willow, 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 7°C
(46°F)		 5°C
(41°F)		 9°C
(49°F)		 18°C
(64°F)		 23°C
(74°F)		 29°C
(84°F)		 31°C
(88°F)		 26°C
(79°F)		 21°C
(70°F)		 15°C
(59°F)		 7°C
(44°F)		 8°C
(46°F)
Mean maximum 4°C
(40°F)		 2°C
(37°F)		 5°C
(41°F)		 14°C
(57°F)		 21°C
(70°F)		 24°C
(75°F)		 27°C
(81°F)		 26°C
(78°F)		 19°C
(66°F)		 12°C
(54°F)		 4°C
(40°F)		 4°C
(39°F)
Average high -9°C
(16°F)		 -5°C
(23°F)		 -0°C
(32°F)		 8°C
(46°F)		 14°C
(58°F)		 18°C
(65°F)		 21°C
(69°F)		 18°C
(65°F)		 14°C
(57°F)		 6°C
(44°F)		 -3°C
(26°F)		 -6°C
(22°F)
Daily mean -12°C
(10°F)		 -9°C
(16°F)		 -6°C
(22°F)		 2°C
(36°F)		 9°C
(49°F)		 14°C
(57°F)		 16°C
(62°F)		 14°C
(58°F)		 9°C
(49°F)		 3°C
(37°F)		 -6°C
(21°F)		 -8°C
(17°F)
Average low -15°C
(4°F)		 -13°C
(9°F)		 -10°C
(14°F)		 -3°C
(27°F)		 5°C
(40°F)		 9°C
(49°F)		 12°C
(54°F)		 10°C
(51°F)		 6°C
(43°F)		 -0°C
(32°F)		 -9°C
(16°F)		 -12°C
(11°F)
Mean minimum -30°C
(-21°F)		 -25°C
(-12°F)		 -21°C
(-5°F)		 -11°C
(12°F)		 -1°C
(31°F)		 6°C
(42°F)		 9°C
(48°F)		 5°C
(42°F)		 -1°C
(31°F)		 -8°C
(17°F)		 -19°C
(-2°F)		 -24°C
(-11°F)
Minimum -35°C
(-31°F)		 -28°C
(-18°F)		 -26°C
(-14°F)		 -20°C
(-4°F)		 -3°C
(28°F)		 2°C
(37°F)		 7°C
(45°F)		 4°C
(39°F)		 -6°C
(21°F)		 -12°C
(10°F)		 -27°C
(-17°F)		 -29°C
(-20°F)

Compare climate in Willow with other places

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

Monthly average precipitation in Willow, Alaska, United States §

Willow usually has the most precipitation in August, September and October, with an average of 17 rainy days and 117 mm (4.6 inches) of precipitation per month.The driest months in Willow are January, March and April. On average, 39 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Willow, 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) 36 (1.4) 48 (1.9) 41 (1.6) 40 (1.6) 79 (3.1) 80 (3.2) 86 (3.4) 134 (5.3) 107 (4.2) 110 (4.3) 67 (2.6) 74 (2.9)
Average precipitation days (≥ 1 mm) 7 10 9 10 20 19 15 18 17 16 10 16

Monthly sunshine hours in Willow, Alaska, United States §

The sunniest months in Willow are May, June and July, when the sun shines an average of 10 hours 6 minutes a day.Least sunny months in Willow: January, November and December receive an average of 2 hours 4 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Willow, 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 56 124 209 275 296 325 307 265 194 135 95 40
Mean daily daylight hours 6h 21m 8h 57m 11h 53m 14h 52m 17h 42m 19h 25m 18h 25m 15h 44m 12h 48m 9h 51m 7h 3m 5h 23m

Solar UV radiation in Willow, Alaska, United States §

Willow 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 Willow UV Index data.

Average daily maximum UV levels by month for Willow, 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 3 3 5 6 6 5 4 2 1 1