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Monthly climate in Mosfellsbaer, Iceland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Mosfellsbaer features a subpolar climate (Cfc). Temperatures typically range between -1 °C (30 °F) and 11 °C (53 °F) through the year, but rarely can drop to -22 °C (-7 °F) or can rise to as high as 23 °C (73 °F). The average annual precipitation amounts to about 1316 mm (51.8 inches) and receives 199 rainy days on the 1 mm (0.04 inches) threshold annually. Mosfellsbaer enjoys an average of 2143 hours of sunshine throughout the year, and daylight varies from 4 hours 18 minutes to 20 hours 50 minutes per day.

Monthly average temperatures in Mosfellsbaer, Iceland

The warmest months in Mosfellsbaer are June, July and August, with daily mean temperatures ranging from 9 to 11 °C (49 - 53 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -1 to 0 °C (30 - 32 °F) throughout the day. On average each year, Mosfellsbaer experiences 0 days above 25 °C (77.0 °F) and 116 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Mosfellsbaer. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum10°C
(50°F)		8°C
(47°F)		9°C
(49°F)		14°C
(58°F)		16°C
(62°F)		20°C
(68°F)		23°C
(73°F)		20°C
(69°F)		16°C
(61°F)		13°C
(56°F)		11°C
(53°F)		10°C
(50°F)
Mean maximum8°C
(46°F)		7°C
(45°F)		8°C
(46°F)		12°C
(54°F)		14°C
(58°F)		16°C
(60°F)		20°C
(69°F)		18°C
(65°F)		14°C
(58°F)		11°C
(52°F)		9°C
(49°F)		8°C
(47°F)
Average high1°C
(35°F)		2°C
(35°F)		3°C
(38°F)		6°C
(44°F)		9°C
(49°F)		12°C
(54°F)		14°C
(57°F)		13°C
(57°F)		10°C
(51°F)		7°C
(45°F)		3°C
(37°F)		1°C
(35°F)
Daily mean-1°C
(30°F)		-1°C
(31°F)		1°C
(33°F)		4°C
(39°F)		7°C
(44°F)		9°C
(49°F)		11°C
(53°F)		11°C
(52°F)		8°C
(47°F)		5°C
(41°F)		1°C
(34°F)		-0°C
(32°F)
Average low-4°C
(25°F)		-3°C
(27°F)		-2°C
(29°F)		1°C
(34°F)		3°C
(39°F)		7°C
(44°F)		9°C
(48°F)		9°C
(48°F)		6°C
(43°F)		2°C
(37°F)		-1°C
(30°F)		-3°C
(28°F)
Mean minimum-12°C
(10°F)		-13°C
(8°F)		-10°C
(15°F)		-7°C
(20°F)		-1°C
(30°F)		3°C
(38°F)		6°C
(42°F)		5°C
(42°F)		-0°C
(32°F)		-3°C
(27°F)		-7°C
(19°F)		-11°C
(13°F)
Minimum-16°C
(3°F)		-22°C
(-7°F)		-15°C
(5°F)		-10°C
(15°F)		-4°C
(25°F)		2°C
(35°F)		3°C
(38°F)		4°C
(39°F)		-3°C
(27°F)		-6°C
(22°F)		-12°C
(11°F)		-15°C
(5°F)

Compare climate in Mosfellsbaer with other places

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

Monthly average precipitation in Mosfellsbaer, Iceland

Mosfellsbaer usually has the most precipitation in February, April and September, with an average of 18 rainy days and 139 mm (5.5 inches) of precipitation per month. The driest months in Mosfellsbaer are July, August and October. On average, 84 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mosfellsbaer. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)118 (4.6)131 (5.1)106 (4.2)123 (4.8)118 (4.6)94 (3.7)76 (3.0)83 (3.3)162 (6.4)94 (3.7)105 (4.1)107 (4.2)
Average precipitation days (≥ 1 mm)161717171815161520161517

Monthly sunshine hours in Mosfellsbaer, Iceland

The sunniest months in Mosfellsbaer are May, June and July, when the sun shines an average of 10 hours 18 minutes a day. Least sunny months in Mosfellsbaer: January, November and December receive an average of 1 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mosfellsbaer. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours30831842113333073072821801316624
Mean daily daylight hours5h 29m8h 33m11h 50m15h 10m18h 31m20h 50m19h 29m16h 14m12h 55m9h 38m6h 24m4h 18m

Solar UV radiation in Mosfellsbaer, Iceland

Mosfellsbaer 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 Mosfellsbaer UV Index data.

Average daily maximum UV levels by month for Mosfellsbaer. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)112456643211