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Monthly climate in Olen, Norway

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Olen features a oceanic climate (Cfb). Temperatures typically range between 2 °C (35 °F) and 15 °C (60 °F) through the year, but rarely can drop to -18 °C (0 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 2410 mm (94.9 inches) and receives 213 rainy days on the 1 mm (0.04 inches) threshold annually. Olen enjoys an average of 3125 hours of sunshine throughout the year, and daylight varies from 6 hours 7 minutes to 18 hours 33 minutes per day.

Monthly average temperatures in Olen, Norway

The warmest months in Olen are June, July and August, with daily mean temperatures ranging from 14 to 15 °C (58 - 60 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 3 °C (35 - 38 °F) throughout the day. On average each year, Olen experiences 4 days above 25 °C (77.0 °F) and 56 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Olen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum11°C
(51°F)		11°C
(52°F)		13°C
(55°F)		20°C
(69°F)		28°C
(82°F)		28°C
(83°F)		31°C
(88°F)		27°C
(80°F)		22°C
(71°F)		19°C
(66°F)		13°C
(56°F)		11°C
(51°F)
Mean maximum9°C
(48°F)		8°C
(47°F)		10°C
(51°F)		17°C
(64°F)		22°C
(72°F)		23°C
(73°F)		27°C
(80°F)		23°C
(74°F)		20°C
(69°F)		16°C
(61°F)		12°C
(54°F)		10°C
(50°F)
Average high4°C
(40°F)		4°C
(40°F)		6°C
(44°F)		10°C
(50°F)		14°C
(57°F)		18°C
(64°F)		19°C
(66°F)		18°C
(65°F)		15°C
(60°F)		11°C
(52°F)		7°C
(46°F)		5°C
(41°F)
Daily mean2°C
(36°F)		2°C
(35°F)		3°C
(39°F)		6°C
(44°F)		10°C
(51°F)		14°C
(58°F)		15°C
(60°F)		15°C
(59°F)		12°C
(55°F)		9°C
(48°F)		5°C
(42°F)		3°C
(38°F)
Average low-0°C
(32°F)		-1°C
(31°F)		1°C
(33°F)		3°C
(37°F)		6°C
(44°F)		11°C
(52°F)		12°C
(54°F)		12°C
(54°F)		10°C
(50°F)		7°C
(44°F)		3°C
(38°F)		1°C
(34°F)
Mean minimum-7°C
(20°F)		-9°C
(17°F)		-6°C
(22°F)		-3°C
(28°F)		0°C
(33°F)		7°C
(44°F)		8°C
(46°F)		8°C
(47°F)		6°C
(43°F)		0°C
(33°F)		-3°C
(27°F)		-5°C
(23°F)
Minimum-12°C
(12°F)		-18°C
(-0°F)		-15°C
(5°F)		-6°C
(22°F)		0°C
(32°F)		5°C
(42°F)		7°C
(44°F)		7°C
(46°F)		4°C
(40°F)		-2°C
(29°F)		-5°C
(23°F)		-7°C
(20°F)

Compare climate in Olen with other places

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

Monthly average precipitation in Olen, Norway

Olen usually has the most precipitation in August, September and October, with an average of 19 rainy days and 278 mm (11.0 inches) of precipitation per month. The driest months in Olen are April, May and June. On average, 134 mm (5.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Olen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)178 (7.0)187 (7.4)190 (7.5)121 (4.8)115 (4.5)165 (6.5)167 (6.6)252 (9.9)253 (10.0)330 (13.0)225 (8.9)227 (8.9)
Average precipitation days (≥ 1 mm)171719161416171918221820

Monthly sunshine hours in Olen, Norway

The sunniest months in Olen are May, June and July, when the sun shines an average of 13 hours 30 minutes a day. Least sunny months in Olen: January, November and December receive an average of 3 hours 13 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Olen. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours7915624732541839443037227221013284
Mean daily daylight hours6h 54m9h 12m11h 52m14h 35m17h 6m18h 33m17h 45m15h 26m12h 46m10h 5m7h 34m6h 7m

Solar UV radiation in Olen, Norway

Olen 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, 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 Olen UV Index data.

Average daily maximum UV levels by month for Olen. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)113457654211