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Monthly climate in Rjukan, Norway

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Rjukan features a subarctic climate (Dfc). Temperatures typically range between -7 °C (20 °F) and 12 °C (53 °F) through the year, but rarely can drop to -26 °C (-14 °F) or can rise to as high as 25 °C (77 °F). The average annual precipitation amounts to about 1214 mm (47.8 inches) and receives 171 rainy days on the 1 mm (0.04 inches) threshold annually. Rjukan enjoys an average of 3162 hours of sunshine throughout the year, and daylight varies from 6 hours 2 minutes to 18 hours 39 minutes per day.

Monthly average temperatures in Rjukan, Norway

The warmest months in Rjukan are June, July and August, with daily mean temperatures ranging from 10 to 12 °C (50 - 53 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -6 °C (20 - 22 °F) throughout the day. On average each year, Rjukan experiences 0 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 Rjukan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum5°C
(42°F)		6°C
(43°F)		12°C
(53°F)		15°C
(59°F)		21°C
(70°F)		23°C
(74°F)		25°C
(77°F)		22°C
(72°F)		21°C
(69°F)		13°C
(56°F)		9°C
(49°F)		5°C
(42°F)
Mean maximum3°C
(38°F)		3°C
(37°F)		7°C
(44°F)		11°C
(52°F)		18°C
(65°F)		19°C
(67°F)		21°C
(70°F)		20°C
(67°F)		16°C
(61°F)		10°C
(50°F)		6°C
(43°F)		4°C
(39°F)
Average high-4°C
(26°F)		-4°C
(26°F)		-1°C
(31°F)		3°C
(37°F)		9°C
(48°F)		14°C
(58°F)		16°C
(61°F)		14°C
(57°F)		10°C
(50°F)		4°C
(40°F)		-1°C
(31°F)		-4°C
(26°F)
Daily mean-6°C
(21°F)		-7°C
(20°F)		-4°C
(24°F)		-1°C
(30°F)		5°C
(40°F)		10°C
(51°F)		12°C
(53°F)		10°C
(50°F)		6°C
(44°F)		2°C
(35°F)		-3°C
(27°F)		-6°C
(22°F)
Average low-9°C
(16°F)		-10°C
(15°F)		-8°C
(18°F)		-5°C
(22°F)		-0°C
(32°F)		6°C
(42°F)		7°C
(45°F)		6°C
(43°F)		3°C
(38°F)		-1°C
(30°F)		-5°C
(22°F)		-8°C
(17°F)
Mean minimum-19°C
(-2°F)		-19°C
(-2°F)		-20°C
(-3°F)		-15°C
(5°F)		-10°C
(14°F)		1°C
(34°F)		2°C
(36°F)		0°C
(33°F)		-1°C
(30°F)		-10°C
(14°F)		-18°C
(-1°F)		-19°C
(-2°F)
Minimum-25°C
(-13°F)		-25°C
(-13°F)		-24°C
(-11°F)		-19°C
(-2°F)		-14°C
(7°F)		-1°C
(30°F)		0°C
(33°F)		-1°C
(30°F)		-3°C
(27°F)		-15°C
(6°F)		-26°C
(-14°F)		-22°C
(-8°F)

Compare climate in Rjukan with other places

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

Monthly average precipitation in Rjukan, Norway

Rjukan usually has the most precipitation in June, September and October, with an average of 16 rainy days and 134 mm (5.3 inches) of precipitation per month. The driest months in Rjukan are January, February and April. On average, 64 mm (2.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rjukan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)68 (2.7)73 (2.9)75 (2.9)51 (2.0)88 (3.5)126 (5.0)114 (4.5)113 (4.5)134 (5.3)143 (5.6)112 (4.4)119 (4.7)
Average precipitation days (≥ 1 mm)11131381214141716191618

Monthly sunshine hours in Rjukan, Norway

The sunniest months in Rjukan are May, June and July, when the sun shines an average of 13 hours 46 minutes a day. Least sunny months in Rjukan: January, November and December receive an average of 2 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rjukan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours8216828235940641045037424719511569
Mean daily daylight hours6h 50m9h 10m11h 51m14h 37m17h 10m18h 39m17h 50m15h 28m12h 47m10h 3m7h 30m6h 2m

Solar UV radiation in Rjukan, Norway

Rjukan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 6 - 7, which corresponds to the High category of sun exposure. January, November 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 Rjukan UV Index data.

Average daily maximum UV levels by month for Rjukan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)123567764211