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Monthly climate in Rotnes, Norway

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Rotnes features a subarctic climate (Dfc). Temperatures typically range between -3 °C (27 °F) and 17 °C (63 °F) through the year, but rarely can drop to -20 °C (-4 °F) or can rise to as high as 32 °C (90 °F). The average annual precipitation amounts to about 1056 mm (41.6 inches) and receives 137 rainy days on the 1 mm (0.04 inches) threshold annually. Rotnes enjoys an average of 3317 hours of sunshine throughout the year, and daylight varies from 5 hours 58 minutes to 18 hours 43 minutes per day.

Monthly average temperatures in Rotnes, Norway

The warmest months in Rotnes are June, July and August, with daily mean temperatures ranging from 15 to 17 °C (60 - 63 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -3 to -2 °C (27 - 28 °F) throughout the day. On average each year, Rotnes experiences 14 days above 25 °C (77.0 °F) and 127 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Rotnes. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum9°C
(49°F)		9°C
(49°F)		16°C
(62°F)		23°C
(73°F)		29°C
(85°F)		30°C
(86°F)		32°C
(90°F)		28°C
(83°F)		25°C
(77°F)		17°C
(63°F)		14°C
(57°F)		7°C
(45°F)
Mean maximum6°C
(43°F)		6°C
(44°F)		12°C
(55°F)		18°C
(65°F)		24°C
(75°F)		25°C
(77°F)		28°C
(82°F)		25°C
(78°F)		21°C
(70°F)		14°C
(58°F)		10°C
(50°F)		6°C
(44°F)
Average high-1°C
(31°F)		0°C
(33°F)		4°C
(40°F)		10°C
(50°F)		15°C
(59°F)		20°C
(69°F)		22°C
(72°F)		20°C
(68°F)		15°C
(60°F)		9°C
(49°F)		4°C
(39°F)		-0°C
(32°F)
Daily mean-3°C
(27°F)		-3°C
(27°F)		0°C
(33°F)		5°C
(41°F)		10°C
(51°F)		16°C
(61°F)		17°C
(63°F)		15°C
(60°F)		12°C
(53°F)		7°C
(44°F)		2°C
(36°F)		-2°C
(28°F)
Average low-6°C
(22°F)		-6°C
(22°F)		-4°C
(26°F)		-0°C
(32°F)		5°C
(42°F)		11°C
(52°F)		12°C
(55°F)		11°C
(53°F)		8°C
(47°F)		4°C
(40°F)		0°C
(33°F)		-4°C
(24°F)
Mean minimum-15°C
(5°F)		-15°C
(6°F)		-11°C
(13°F)		-7°C
(19°F)		-2°C
(29°F)		6°C
(43°F)		7°C
(46°F)		6°C
(43°F)		4°C
(39°F)		-3°C
(28°F)		-7°C
(19°F)		-12°C
(10°F)
Minimum-18°C
(-1°F)		-20°C
(-4°F)		-18°C
(0°F)		-12°C
(11°F)		-3°C
(26°F)		3°C
(38°F)		5°C
(41°F)		5°C
(42°F)		1°C
(35°F)		-4°C
(25°F)		-9°C
(15°F)		-16°C
(3°F)

Compare climate in Rotnes with other places

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

Monthly average precipitation in Rotnes, Norway

Rotnes usually has the most precipitation in October, November and December, with an average of 14 rainy days and 115 mm (4.5 inches) of precipitation per month. The driest months in Rotnes are January, February and April. On average, 54 mm (2.1 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Rotnes. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)60 (2.4)64 (2.5)65 (2.5)38 (1.5)90 (3.5)86 (3.4)103 (4.1)100 (3.9)106 (4.2)130 (5.1)107 (4.2)107 (4.2)
Average precipitation days (≥ 1 mm)910961212111313141216

Monthly sunshine hours in Rotnes, Norway

The sunniest months in Rotnes are May, June and July, when the sun shines an average of 14 hours 14 minutes a day. Least sunny months in Rotnes: January, November and December receive an average of 3 hours 21 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Rotnes. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours8817528636940344046539026720912693
Mean daily daylight hours6h 47m9h 8m11h 51m14h 38m17h 13m18h 43m17h 54m15h 30m12h 47m10h 3m7h 28m5h 58m

Solar UV radiation in Rotnes, Norway

Rotnes experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 5 - 7, which corresponds to the Moderate / 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 Rotnes UV Index data.

Average daily maximum UV levels by month for Rotnes. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)123457754211