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Monthly climate in Fort Greely, Alaska, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Fort Greely features a subarctic climate (Dsc).Temperatures typically range between -18 °C (0 °F) and 17 °C (63 °F) through the year, but rarely can drop to -40 °C (-39 °F) or can rise to as high as 31 °C (88 °F).The average annual precipitation amounts to about 566 mm (22.3 inches) and receives 112 rainy days on the 1 mm (0.04 inches) threshold annually.Fort Greely enjoys an average of 2484 hours of sunshine throughout the year, and daylight varies from 4 hours 25 minutes to 20 hours 40 minutes per day.

Monthly average temperatures in Fort Greely, Alaska, United States §

The warmest months in Fort Greely are June, July and August, with daily mean temperatures ranging from 13 to 17 °C (56 - 63 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -18 to -14 °C (0 - 7 °F) throughout the day. On average each year, Fort Greely experiences 8 days above 25 °C (77.0 °F) and 192 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Fort Greely, 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 4°C
(39°F)		 3°C
(38°F)		 14°C
(57°F)		 18°C
(64°F)		 24°C
(76°F)		 31°C
(88°F)		 30°C
(86°F)		 29°C
(84°F)		 22°C
(72°F)		 16°C
(62°F)		 4°C
(39°F)		 2°C
(36°F)
Mean maximum -1°C
(31°F)		 -1°C
(31°F)		 5°C
(41°F)		 14°C
(58°F)		 21°C
(71°F)		 27°C
(80°F)		 28°C
(82°F)		 26°C
(79°F)		 19°C
(67°F)		 12°C
(53°F)		 1°C
(35°F)		 0°C
(32°F)
Average high -15°C
(6°F)		 -11°C
(12°F)		 -4°C
(25°F)		 6°C
(43°F)		 15°C
(59°F)		 20°C
(68°F)		 21°C
(71°F)		 18°C
(64°F)		 13°C
(55°F)		 2°C
(37°F)		 -10°C
(15°F)		 -11°C
(12°F)
Daily mean -18°C
(-0°F)		 -16°C
(4°F)		 -10°C
(14°F)		 0°C
(33°F)		 10°C
(50°F)		 15°C
(60°F)		 17°C
(63°F)		 13°C
(56°F)		 8°C
(46°F)		 -1°C
(30°F)		 -13°C
(9°F)		 -14°C
(7°F)
Average low -21°C
(-6°F)		 -20°C
(-3°F)		 -15°C
(5°F)		 -5°C
(23°F)		 4°C
(40°F)		 10°C
(50°F)		 12°C
(54°F)		 9°C
(49°F)		 4°C
(39°F)		 -4°C
(25°F)		 -16°C
(4°F)		 -18°C
(1°F)
Mean minimum -37°C
(-33°F)		 -34°C
(-29°F)		 -30°C
(-21°F)		 -17°C
(1°F)		 -2°C
(29°F)		 5°C
(42°F)		 7°C
(45°F)		 4°C
(39°F)		 -4°C
(26°F)		 -16°C
(4°F)		 -28°C
(-17°F)		 -31°C
(-23°F)
Minimum -40°C
(-39°F)		 -37°C
(-35°F)		 -35°C
(-31°F)		 -31°C
(-24°F)		 -3°C
(26°F)		 3°C
(38°F)		 5°C
(41°F)		 1°C
(34°F)		 -12°C
(11°F)		 -23°C
(-9°F)		 -34°C
(-28°F)		 -37°C
(-35°F)

Compare climate in Fort Greely with other places

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

Monthly average precipitation in Fort Greely, Alaska, United States §

Fort Greely usually has the most precipitation in June, July and August, with an average of 14 rainy days and 90 mm (3.6 inches) of precipitation per month.The driest months in Fort Greely are January, February and April. On average, 19 mm (0.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Fort Greely, 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) 14 (0.6) 21 (0.8) 24 (0.9) 23 (0.9) 42 (1.7) 78 (3.1) 74 (2.9) 119 (4.7) 56 (2.2) 48 (1.9) 33 (1.3) 34 (1.3)
Average precipitation days (≥ 1 mm) 4 5 6 6 8 14 14 16 12 11 9 7

Monthly sunshine hours in Fort Greely, Alaska, United States §

The sunniest months in Fort Greely are May, June and July, when the sun shines an average of 11 hours 49 minutes a day.Least sunny months in Fort Greely: 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 Fort Greely, 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 47 124 225 309 359 376 351 250 196 129 77 35
Mean daily daylight hours 5h 36m 8h 38m 11h 52m 15h 10m 18h 27m 20h 40m 19h 21m 16h 9m 12h 53m 9h 38m 6h 27m 4h 25m

Solar UV radiation in Fort Greely, Alaska, United States §

Fort Greely experiences the highest level of ultraviolet (UV) radiation in May, 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 Fort Greely UV Index data.

Average daily maximum UV levels by month for Fort Greely, 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 5 6 5 3 2 1 1