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Monthly climate in Alta, Norway

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Alta features a subarctic climate (Dfc). Temperatures typically range between -9 °C (16 °F) and 13 °C (55 °F) through the year, but rarely can drop to -28 °C (-17 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 754 mm (29.7 inches) and receives 169 rainy days on the 1 mm (0.04 inches) threshold annually. Alta enjoys an average of 2548 hours of sunshine throughout the year, and daylight varies from 0 hours 0 minutes to 24 hours 0 minutes per day.

Monthly average temperatures in Alta, Norway

The warmest months in Alta are June, July and August, with daily mean temperatures ranging from 9 to 13 °C (48 - 55 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -9 to -8 °C (16 - 18 °F) throughout the day. On average each year, Alta experiences 1 days above 25 °C (77.0 °F) and 191 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Alta. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum5°C
(42°F)		6°C
(44°F)		7°C
(45°F)		14°C
(57°F)		19°C
(67°F)		24°C
(76°F)		27°C
(81°F)		28°C
(83°F)		21°C
(70°F)		14°C
(57°F)		7°C
(44°F)		4°C
(39°F)
Mean maximum3°C
(38°F)		3°C
(37°F)		4°C
(39°F)		8°C
(47°F)		14°C
(58°F)		20°C
(68°F)		24°C
(76°F)		22°C
(72°F)		18°C
(64°F)		11°C
(52°F)		5°C
(41°F)		2°C
(36°F)
Average high-7°C
(21°F)		-7°C
(20°F)		-3°C
(27°F)		2°C
(35°F)		6°C
(43°F)		12°C
(54°F)		16°C
(61°F)		14°C
(57°F)		10°C
(50°F)		2°C
(37°F)		-2°C
(29°F)		-5°C
(23°F)
Daily mean-9°C
(16°F)		-9°C
(16°F)		-6°C
(22°F)		-1°C
(30°F)		3°C
(38°F)		9°C
(48°F)		13°C
(55°F)		11°C
(52°F)		7°C
(45°F)		0°C
(33°F)		-4°C
(24°F)		-8°C
(18°F)
Average low-12°C
(11°F)		-12°C
(11°F)		-9°C
(17°F)		-4°C
(24°F)		0°C
(32°F)		6°C
(42°F)		9°C
(48°F)		8°C
(46°F)		4°C
(40°F)		-2°C
(29°F)		-7°C
(20°F)		-11°C
(13°F)
Mean minimum-23°C
(-9°F)		-20°C
(-3°F)		-17°C
(1°F)		-12°C
(10°F)		-7°C
(20°F)		2°C
(36°F)		4°C
(40°F)		3°C
(37°F)		-1°C
(30°F)		-13°C
(9°F)		-16°C
(3°F)		-22°C
(-7°F)
Minimum-28°C
(-17°F)		-25°C
(-12°F)		-22°C
(-8°F)		-14°C
(7°F)		-8°C
(18°F)		-3°C
(27°F)		3°C
(38°F)		1°C
(35°F)		-3°C
(28°F)		-19°C
(-2°F)		-26°C
(-15°F)		-24°C
(-11°F)

Compare climate in Alta with other places

Compare temperature, precipitation, sunshine, UV index in Alta, Norway with other places around the world.

Monthly average precipitation in Alta, Norway

Alta usually has the most precipitation in June, July and August, with an average of 15 rainy days and 88 mm (3.5 inches) of precipitation per month. The driest months in Alta are January, February and December. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Alta. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)46 (1.8)48 (1.9)59 (2.3)55 (2.2)63 (2.5)89 (3.5)83 (3.3)92 (3.6)76 (3.0)50 (2.0)53 (2.1)39 (1.5)
Average precipitation days (≥ 1 mm)111216141717131515141411

Monthly sunshine hours in Alta, Norway

The sunniest months in Alta are May, June and July, when the sun shines an average of 12 hours 56 minutes a day. Least sunny months in Alta: January, November and December receive an average of 0 hours 19 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Alta. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours594245316393383413291237141240
Mean daily daylight hours4h 58m7h 12m11h 45m16h 20m22h 21m24h 0m23h 40m18h 1m13h 15m8h 49m5h 26m0h 0m

Solar UV radiation in Alta, Norway

Alta experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 5 - 5, which corresponds to the Moderate category of sun exposure. February, October 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 Alta UV Index data.

Average daily maximum UV levels by month for Alta. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)112355542110