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Monthly climate in Arendal, Norway

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arendal features a oceanic climate (Cfb). Temperatures typically range between 1 °C (34 °F) and 18 °C (65 °F) through the year, but rarely can drop to -16 °C (4 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 1224 mm (48.2 inches) and receives 148 rainy days on the 1 mm (0.04 inches) threshold annually. Arendal enjoys an average of 3518 hours of sunshine throughout the year, and daylight varies from 6 hours 27 minutes to 18 hours 9 minutes per day.

Monthly average temperatures in Arendal, Norway

The warmest months in Arendal are June, July and August, with daily mean temperatures ranging from 16 to 18 °C (62 - 65 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 1 to 2 °C (34 - 36 °F) throughout the day. On average each year, Arendal experiences 12 days above 25 °C (77.0 °F) and 76 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Arendal. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(50°F)		12°C
(53°F)		21°C
(70°F)		20°C
(68°F)		27°C
(81°F)		31°C
(88°F)		29°C
(85°F)		27°C
(81°F)		26°C
(80°F)		17°C
(64°F)		15°C
(59°F)		12°C
(53°F)
Mean maximum9°C
(48°F)		9°C
(48°F)		14°C
(58°F)		18°C
(65°F)		23°C
(73°F)		25°C
(77°F)		26°C
(80°F)		26°C
(78°F)		22°C
(72°F)		16°C
(61°F)		13°C
(56°F)		9°C
(49°F)
Average high3°C
(38°F)		3°C
(38°F)		6°C
(44°F)		11°C
(52°F)		15°C
(60°F)		20°C
(69°F)		22°C
(72°F)		20°C
(69°F)		17°C
(62°F)		12°C
(53°F)		7°C
(45°F)		4°C
(39°F)
Daily mean1°C
(35°F)		1°C
(34°F)		3°C
(37°F)		7°C
(44°F)		12°C
(53°F)		16°C
(62°F)		18°C
(65°F)		16°C
(62°F)		13°C
(56°F)		9°C
(48°F)		5°C
(41°F)		2°C
(36°F)
Average low-1°C
(30°F)		-2°C
(29°F)		-0°C
(31°F)		2°C
(37°F)		7°C
(45°F)		12°C
(54°F)		14°C
(57°F)		12°C
(55°F)		10°C
(51°F)		6°C
(44°F)		3°C
(37°F)		-0°C
(32°F)
Mean minimum-9°C
(16°F)		-10°C
(15°F)		-8°C
(17°F)		-4°C
(25°F)		1°C
(34°F)		8°C
(47°F)		10°C
(50°F)		8°C
(46°F)		5°C
(41°F)		-0°C
(31°F)		-5°C
(23°F)		-9°C
(17°F)
Minimum-14°C
(7°F)		-16°C
(4°F)		-13°C
(9°F)		-7°C
(20°F)		-0°C
(32°F)		5°C
(42°F)		9°C
(48°F)		7°C
(45°F)		2°C
(36°F)		-3°C
(28°F)		-8°C
(17°F)		-12°C
(10°F)

Compare climate in Arendal with other places

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

Monthly average precipitation in Arendal, Norway

Arendal usually has the most precipitation in October, November and December, with an average of 16 rainy days and 144 mm (5.7 inches) of precipitation per month. The driest months in Arendal are January, April and May. On average, 68 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arendal. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)79 (3.1)98 (3.9)91 (3.6)39 (1.5)88 (3.4)94 (3.7)94 (3.7)92 (3.6)118 (4.6)157 (6.2)121 (4.8)154 (6.0)
Average precipitation days (≥ 1 mm)11121171012121213151518

Monthly sunshine hours in Arendal, Norway

The sunniest months in Arendal are May, June and July, when the sun shines an average of 15 hours 2 minutes a day. Least sunny months in Arendal: January, November and December receive an average of 3 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arendal. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours101178288377440464478414292243136101
Mean daily daylight hours7h 10m9h 20m11h 52m14h 28m16h 49m18h 9m17h 26m15h 16m12h 44m10h 11m7h 48m6h 27m

Solar UV radiation in Arendal, Norway

Arendal 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 Arendal UV Index data.

Average daily maximum UV levels by month for Arendal. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)123457764211