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Monthly climate in Big Delta, Alaska, United States

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Big Delta features a subarctic climate (Dfc).Temperatures typically range between -19 °C (-1 °F) and 16 °C (62 °F) through the year, but rarely can drop to -44 °C (-47 °F) or can rise to as high as 31 °C (88 °F).The average annual precipitation amounts to about 586 mm (23.1 inches) and receives 107 rainy days on the 1 mm (0.04 inches) threshold annually.Big Delta enjoys an average of 2457 hours of sunshine throughout the year, and daylight varies from 4 hours 18 minutes to 20 hours 50 minutes per day.

Monthly average temperatures in Big Delta, Alaska, United States §

The warmest months in Big Delta are June, July and August, with daily mean temperatures ranging from 13 to 16 °C (55 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -19 to -15 °C (-1 - 6 °F) throughout the day. On average each year, Big Delta experiences 7 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 Big Delta, 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 3°C
(38°F)		 3°C
(37°F)		 14°C
(57°F)		 18°C
(64°F)		 25°C
(76°F)		 31°C
(88°F)		 29°C
(85°F)		 29°C
(84°F)		 21°C
(71°F)		 16°C
(61°F)		 4°C
(39°F)		 3°C
(37°F)
Mean maximum -1°C
(31°F)		 -0°C
(32°F)		 5°C
(41°F)		 14°C
(57°F)		 21°C
(70°F)		 27°C
(80°F)		 27°C
(82°F)		 26°C
(78°F)		 19°C
(66°F)		 11°C
(53°F)		 1°C
(34°F)		 0°C
(32°F)
Average high -15°C
(5°F)		 -12°C
(11°F)		 -4°C
(25°F)		 6°C
(43°F)		 15°C
(58°F)		 19°C
(67°F)		 21°C
(70°F)		 17°C
(63°F)		 12°C
(54°F)		 2°C
(37°F)		 -10°C
(14°F)		 -11°C
(12°F)
Daily mean -19°C
(-1°F)		 -16°C
(3°F)		 -10°C
(14°F)		 0°C
(33°F)		 10°C
(49°F)		 15°C
(59°F)		 16°C
(62°F)		 13°C
(55°F)		 8°C
(46°F)		 -1°C
(31°F)		 -13°C
(10°F)		 -15°C
(6°F)
Average low -22°C
(-7°F)		 -20°C
(-4°F)		 -16°C
(4°F)		 -5°C
(23°F)		 4°C
(39°F)		 9°C
(49°F)		 11°C
(53°F)		 9°C
(48°F)		 4°C
(39°F)		 -4°C
(25°F)		 -15°C
(4°F)		 -18°C
(-0°F)
Mean minimum -38°C
(-36°F)		 -34°C
(-29°F)		 -31°C
(-24°F)		 -17°C
(2°F)		 -2°C
(28°F)		 5°C
(42°F)		 7°C
(44°F)		 3°C
(38°F)		 -3°C
(28°F)		 -13°C
(9°F)		 -27°C
(-16°F)		 -31°C
(-23°F)
Minimum -44°C
(-47°F)		 -37°C
(-35°F)		 -37°C
(-34°F)		 -30°C
(-22°F)		 -4°C
(24°F)		 3°C
(38°F)		 4°C
(40°F)		 1°C
(34°F)		 -9°C
(16°F)		 -16°C
(4°F)		 -34°C
(-30°F)		 -37°C
(-34°F)

Compare climate in Big Delta with other places

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

Monthly average precipitation in Big Delta, Alaska, United States §

Big Delta usually has the most precipitation in June, July and August, with an average of 15 rainy days and 107 mm (4.2 inches) of precipitation per month.The driest months in Big Delta are January, February and April. On average, 17 mm (0.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Big Delta, 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) 12 (0.5) 21 (0.8) 21 (0.8) 18 (0.7) 45 (1.8) 115 (4.5) 93 (3.7) 111 (4.4) 48 (1.9) 41 (1.6) 28 (1.1) 33 (1.3)
Average precipitation days (≥ 1 mm) 3 5 6 4 9 15 15 16 12 9 7 6

Monthly sunshine hours in Big Delta, Alaska, United States §

The sunniest months in Big Delta are May, June and July, when the sun shines an average of 11 hours 52 minutes a day.Least sunny months in Big Delta: January, November and December receive an average of 1 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Big Delta, 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 45 118 215 307 361 379 351 246 190 130 72 37
Mean daily daylight hours 5h 31m 8h 35m 11h 52m 15h 12m 18h 32m 20h 50m 19h 27m 16h 11m 12h 53m 9h 36m 6h 23m 4h 18m

Solar UV radiation in Big Delta, Alaska, United States §

Big Delta experiences the highest level of ultraviolet (UV) radiation in May, July and August, when the maximum UV index can reach values of 5 - 5, which corresponds to the Moderate 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 Big Delta UV Index data.

Average daily maximum UV levels by month for Big Delta, 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 5 5 3 2 1 1