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Monthly climate in Grindavik, Iceland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Grindavik features a subpolar climate (Cfc). Temperatures typically range between 3 °C (37 °F) and 11 °C (52 °F) through the year, but rarely can drop to -8 °C (19 °F) or can rise to as high as 18 °C (65 °F). The average annual precipitation amounts to about 1421 mm (55.9 inches) and receives 211 rainy days on the 1 mm (0.04 inches) threshold annually. Grindavik enjoys an average of 2220 hours of sunshine throughout the year, and daylight varies from 4 hours 29 minutes to 20 hours 35 minutes per day.

Monthly average temperatures in Grindavik, Iceland

The warmest months in Grindavik are July, August and September, with daily mean temperatures ranging from 9 to 11 °C (49 - 52 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 3 to 3 °C (37 - 38 °F) throughout the day. On average each year, Grindavik experiences 0 days above 25 °C (77.0 °F) and 40 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Grindavik. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(50°F)		9°C
(48°F)		8°C
(47°F)		10°C
(51°F)		12°C
(54°F)		15°C
(58°F)		18°C
(65°F)		15°C
(59°F)		13°C
(56°F)		11°C
(53°F)		10°C
(51°F)		10°C
(49°F)
Mean maximum9°C
(48°F)		8°C
(47°F)		8°C
(46°F)		9°C
(49°F)		11°C
(51°F)		12°C
(54°F)		16°C
(61°F)		15°C
(58°F)		12°C
(55°F)		11°C
(51°F)		9°C
(49°F)		9°C
(49°F)
Average high4°C
(40°F)		4°C
(40°F)		4°C
(40°F)		6°C
(44°F)		8°C
(47°F)		10°C
(50°F)		12°C
(54°F)		12°C
(54°F)		10°C
(51°F)		8°C
(46°F)		6°C
(42°F)		5°C
(40°F)
Daily mean3°C
(37°F)		3°C
(37°F)		3°C
(38°F)		5°C
(41°F)		7°C
(44°F)		9°C
(48°F)		11°C
(52°F)		11°C
(52°F)		9°C
(49°F)		7°C
(44°F)		4°C
(40°F)		3°C
(38°F)
Average low1°C
(34°F)		1°C
(35°F)		2°C
(35°F)		4°C
(39°F)		5°C
(42°F)		8°C
(46°F)		10°C
(50°F)		10°C
(50°F)		8°C
(47°F)		6°C
(42°F)		3°C
(38°F)		2°C
(36°F)
Mean minimum-4°C
(26°F)		-3°C
(26°F)		-2°C
(28°F)		-2°C
(28°F)		2°C
(35°F)		5°C
(42°F)		8°C
(46°F)		8°C
(47°F)		4°C
(40°F)		2°C
(35°F)		-0°C
(32°F)		-3°C
(27°F)
Minimum-5°C
(23°F)		-8°C
(19°F)		-4°C
(24°F)		-6°C
(21°F)		1°C
(34°F)		4°C
(39°F)		6°C
(44°F)		7°C
(46°F)		2°C
(35°F)		-1°C
(31°F)		-3°C
(27°F)		-4°C
(25°F)

Compare climate in Grindavik with other places

Compare temperature, precipitation, sunshine, UV index in Grindavik, Iceland with other places around the world.

Monthly average precipitation in Grindavik, Iceland

Grindavik usually has the most precipitation in February, April and September, with an average of 19 rainy days and 144 mm (5.7 inches) of precipitation per month. The driest months in Grindavik are June, July and August. On average, 82 mm (3.2 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Grindavik. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)124 (4.9)138 (5.4)119 (4.7)134 (5.3)113 (4.4)82 (3.2)77 (3.0)88 (3.5)159 (6.2)131 (5.2)128 (5.0)127 (5.0)
Average precipitation days (≥ 1 mm)182020191615161320171918

Monthly sunshine hours in Grindavik, Iceland

The sunniest months in Grindavik are May, June and July, when the sun shines an average of 10 hours 23 minutes a day. Least sunny months in Grindavik: January, November and December receive an average of 1 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Grindavik. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours45911862043233352962862031387731
Mean daily daylight hours5h 37m8h 36m11h 50m15h 7m18h 23m20h 35m19h 19m16h 10m12h 54m9h 41m6h 30m4h 29m

Solar UV radiation in Grindavik, Iceland

Grindavik experiences the highest level of ultraviolet (UV) radiation in May, June and July, when the maximum UV index can reach values of 5 - 6, 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 Grindavik UV Index data.

Average daily maximum UV levels by month for Grindavik. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)112356643211