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Monthly climate in Grimstad, Norway

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Grimstad features a oceanic climate (Cfb). Temperatures typically range between 2 °C (35 °F) and 18 °C (64 °F) through the year, but rarely can drop to -12 °C (10 °F) or can rise to as high as 28 °C (83 °F). The average annual precipitation amounts to about 1244 mm (49.0 inches) and receives 152 rainy days on the 1 mm (0.04 inches) threshold annually. Grimstad enjoys an average of 3485 hours of sunshine throughout the year, and daylight varies from 6 hours 29 minutes to 18 hours 7 minutes per day.

Monthly average temperatures in Grimstad, Norway

The warmest months in Grimstad are June, July and August, with daily mean temperatures ranging from 16 to 18 °C (61 - 64 °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, Grimstad experiences 4 days above 25 °C (77.0 °F) and 52 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grimstad. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(49°F)		10°C
(51°F)		17°C
(64°F)		17°C
(62°F)		25°C
(78°F)		28°C
(83°F)		27°C
(81°F)		25°C
(77°F)		25°C
(77°F)		17°C
(62°F)		14°C
(58°F)		11°C
(53°F)
Mean maximum8°C
(48°F)		8°C
(47°F)		12°C
(55°F)		16°C
(61°F)		20°C
(69°F)		23°C
(73°F)		25°C
(76°F)		24°C
(75°F)		21°C
(70°F)		15°C
(60°F)		13°C
(55°F)		9°C
(49°F)
Average high4°C
(40°F)		4°C
(39°F)		6°C
(43°F)		10°C
(50°F)		14°C
(58°F)		19°C
(66°F)		21°C
(70°F)		19°C
(67°F)		16°C
(61°F)		12°C
(54°F)		8°C
(46°F)		5°C
(41°F)
Daily mean2°C
(36°F)		2°C
(35°F)		3°C
(38°F)		6°C
(44°F)		11°C
(52°F)		16°C
(61°F)		18°C
(64°F)		16°C
(62°F)		14°C
(57°F)		10°C
(50°F)		6°C
(43°F)		3°C
(38°F)
Average low0°C
(33°F)		-0°C
(31°F)		1°C
(34°F)		3°C
(38°F)		8°C
(46°F)		13°C
(55°F)		14°C
(58°F)		13°C
(56°F)		11°C
(53°F)		8°C
(46°F)		4°C
(40°F)		1°C
(35°F)
Mean minimum-7°C
(21°F)		-7°C
(20°F)		-6°C
(21°F)		-2°C
(29°F)		2°C
(37°F)		9°C
(48°F)		11°C
(52°F)		9°C
(49°F)		7°C
(44°F)		2°C
(36°F)		-3°C
(27°F)		-6°C
(22°F)
Minimum-11°C
(12°F)		-12°C
(10°F)		-10°C
(14°F)		-5°C
(23°F)		1°C
(34°F)		6°C
(43°F)		9°C
(49°F)		9°C
(48°F)		4°C
(40°F)		-0°C
(32°F)		-6°C
(22°F)		-9°C
(15°F)

Compare climate in Grimstad with other places

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

Monthly average precipitation in Grimstad, Norway

Grimstad usually has the most precipitation in October, November and December, with an average of 16 rainy days and 150 mm (5.9 inches) of precipitation per month. The driest months in Grimstad are January, April and May. On average, 67 mm (2.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grimstad. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)81 (3.2)103 (4.0)97 (3.8)38 (1.5)83 (3.3)88 (3.5)88 (3.5)101 (4.0)115 (4.5)169 (6.7)128 (5.1)152 (6.0)
Average precipitation days (≥ 1 mm)12131261011111314151619

Monthly sunshine hours in Grimstad, Norway

The sunniest months in Grimstad are May, June and July, when the sun shines an average of 14 hours 55 minutes a day. Least sunny months in Grimstad: January, November and December receive an average of 3 hours 38 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grimstad. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours10117628737543745947541028923913498
Mean daily daylight hours7h 12m9h 21m11h 52m14h 27m16h 48m18h 7m17h 24m15h 14m12h 44m10h 11m7h 49m6h 29m

Solar UV radiation in Grimstad, Norway

Grimstad 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 Grimstad UV Index data.

Average daily maximum UV levels by month for Grimstad. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)123467764211