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Monthly climate in Isafjoerdur, Iceland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Isafjoerdur features a ice cap climate ET). Temperatures typically range between -2 °C (29 °F) and 9 °C (48 °F) through the year, but rarely can drop to -13 °C (8 °F) or can rise to as high as 17 °C (62 °F). The average annual precipitation amounts to about 1311 mm (51.6 inches) and receives 211 rainy days on the 1 mm (0.04 inches) threshold annually. Isafjoerdur enjoys an average of 1874 hours of sunshine throughout the year, and daylight varies from 3 hours 0 minutes to 23 hours 29 minutes per day.

Monthly average temperatures in Isafjoerdur, Iceland

The warmest months in Isafjoerdur are June, July and August, with daily mean temperatures ranging from 7 to 9 °C (44 - 48 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -2 to -1 °C (29 - 30 °F) throughout the day. On average each year, Isafjoerdur experiences 0 days above 25 °C (77.0 °F) and 147 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Isafjoerdur. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(47°F)		7°C
(44°F)		6°C
(44°F)		12°C
(53°F)		13°C
(55°F)		14°C
(57°F)		17°C
(62°F)		17°C
(62°F)		13°C
(56°F)		10°C
(49°F)		10°C
(51°F)		8°C
(47°F)
Mean maximum6°C
(44°F)		5°C
(42°F)		5°C
(42°F)		8°C
(46°F)		11°C
(52°F)		12°C
(54°F)		16°C
(61°F)		14°C
(58°F)		13°C
(55°F)		8°C
(46°F)		8°C
(46°F)		7°C
(44°F)
Average high-0°C
(32°F)		0°C
(33°F)		0°C
(32°F)		2°C
(37°F)		5°C
(42°F)		8°C
(47°F)		11°C
(51°F)		11°C
(51°F)		8°C
(46°F)		5°C
(41°F)		2°C
(35°F)		0°C
(33°F)
Daily mean-2°C
(29°F)		-1°C
(30°F)		-2°C
(29°F)		1°C
(34°F)		4°C
(39°F)		7°C
(44°F)		9°C
(48°F)		9°C
(48°F)		6°C
(44°F)		3°C
(38°F)		0°C
(33°F)		-1°C
(30°F)
Average low-4°C
(25°F)		-3°C
(27°F)		-3°C
(26°F)		-1°C
(30°F)		2°C
(35°F)		5°C
(41°F)		7°C
(46°F)		7°C
(45°F)		5°C
(41°F)		2°C
(35°F)		-2°C
(29°F)		-3°C
(27°F)
Mean minimum-11°C
(13°F)		-8°C
(17°F)		-9°C
(15°F)		-8°C
(18°F)		-3°C
(27°F)		2°C
(36°F)		4°C
(40°F)		5°C
(41°F)		0°C
(32°F)		-3°C
(28°F)		-7°C
(20°F)		-10°C
(15°F)
Minimum-12°C
(11°F)		-13°C
(8°F)		-13°C
(10°F)		-12°C
(10°F)		-4°C
(25°F)		0°C
(33°F)		3°C
(38°F)		3°C
(37°F)		-3°C
(28°F)		-6°C
(22°F)		-9°C
(16°F)		-12°C
(10°F)

Compare climate in Isafjoerdur with other places

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

Monthly average precipitation in Isafjoerdur, Iceland

Isafjoerdur usually has the most precipitation in February, September and October, with an average of 20 rainy days and 139 mm (5.5 inches) of precipitation per month. The driest months in Isafjoerdur are May, June and August. On average, 75 mm (2.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Isafjoerdur. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)127 (5.0)131 (5.2)109 (4.3)113 (4.4)77 (3.0)71 (2.8)79 (3.1)76 (3.0)155 (6.1)130 (5.1)116 (4.6)127 (5.0)
Average precipitation days (≥ 1 mm)202019161414141420201921

Monthly sunshine hours in Isafjoerdur, Iceland

The sunniest months in Isafjoerdur are May, June and July, when the sun shines an average of 9 hours 31 minutes a day. Least sunny months in Isafjoerdur: January, November and December receive an average of 0 hours 39 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Isafjoerdur. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours1660157224324284267243152100357
Mean daily daylight hours4h 36m8h 12m11h 49m15h 29m19h 25m23h 29m20h 49m16h 41m13h 0m9h 25m5h 44m3h 0m

Solar UV radiation in Isafjoerdur, Iceland

Isafjoerdur 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 Isafjoerdur UV Index data.

Average daily maximum UV levels by month for Isafjoerdur. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)112456543211