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Monthly climate in Borgarnes, Iceland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Borgarnes features a ice cap climate ET). Temperatures typically range between -1 °C (31 °F) and 11 °C (52 °F) through the year, but rarely can drop to -15 °C (5 °F) or can rise to as high as 21 °C (70 °F). The average annual precipitation amounts to about 1301 mm (51.2 inches) and receives 194 rainy days on the 1 mm (0.04 inches) threshold annually. Borgarnes enjoys an average of 2167 hours of sunshine throughout the year, and daylight varies from 4 hours 6 minutes to 21 hours 8 minutes per day.

Monthly average temperatures in Borgarnes, Iceland

The warmest months in Borgarnes are June, July and August, 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 December, when daily mean temperatures range from -1 to 0 °C (31 - 33 °F) throughout the day. On average each year, Borgarnes experiences 0 days above 25 °C (77.0 °F) and 104 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Borgarnes. 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
(48°F)		13°C
(56°F)		16°C
(61°F)		19°C
(66°F)		21°C
(70°F)		20°C
(68°F)		16°C
(61°F)		13°C
(55°F)		11°C
(52°F)		10°C
(50°F)
Mean maximum7°C
(46°F)		7°C
(45°F)		7°C
(45°F)		11°C
(52°F)		14°C
(57°F)		15°C
(59°F)		19°C
(67°F)		18°C
(64°F)		14°C
(58°F)		11°C
(52°F)		9°C
(48°F)		8°C
(46°F)
Average high1°C
(35°F)		2°C
(36°F)		3°C
(37°F)		6°C
(43°F)		9°C
(48°F)		11°C
(52°F)		13°C
(56°F)		13°C
(56°F)		10°C
(51°F)		7°C
(45°F)		3°C
(38°F)		2°C
(36°F)
Daily mean-1°C
(31°F)		-0°C
(32°F)		1°C
(34°F)		4°C
(39°F)		7°C
(44°F)		9°C
(49°F)		11°C
(52°F)		11°C
(52°F)		8°C
(47°F)		5°C
(41°F)		1°C
(35°F)		0°C
(33°F)
Average low-3°C
(27°F)		-2°C
(28°F)		-1°C
(30°F)		1°C
(35°F)		4°C
(40°F)		7°C
(45°F)		9°C
(49°F)		9°C
(49°F)		6°C
(44°F)		3°C
(38°F)		-0°C
(32°F)		-2°C
(29°F)
Mean minimum-11°C
(12°F)		-11°C
(13°F)		-8°C
(18°F)		-7°C
(20°F)		-0°C
(32°F)		4°C
(39°F)		6°C
(43°F)		6°C
(43°F)		1°C
(34°F)		-1°C
(30°F)		-6°C
(21°F)		-11°C
(12°F)
Minimum-15°C
(6°F)		-15°C
(5°F)		-11°C
(13°F)		-10°C
(13°F)		-2°C
(28°F)		2°C
(37°F)		5°C
(41°F)		5°C
(41°F)		-2°C
(29°F)		-5°C
(24°F)		-12°C
(12°F)		-14°C
(8°F)

Compare climate in Borgarnes with other places

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

Monthly average precipitation in Borgarnes, Iceland

Borgarnes usually has the most precipitation in January, February and September, with an average of 17 rainy days and 139 mm (5.5 inches) of precipitation per month. The driest months in Borgarnes are June, July and August. On average, 83 mm (3.3 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Borgarnes. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)117 (4.6)120 (4.7)108 (4.3)114 (4.5)104 (4.1)87 (3.4)78 (3.1)85 (3.3)180 (7.1)94 (3.7)103 (4.1)110 (4.3)
Average precipitation days (≥ 1 mm)151717171614171221161517

Monthly sunshine hours in Borgarnes, Iceland

The sunniest months in Borgarnes are May, June and July, when the sun shines an average of 10 hours 24 minutes a day. Least sunny months in Borgarnes: January, November and December receive an average of 1 hours 21 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Borgarnes. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours31841852113363123082811861346924
Mean daily daylight hours5h 20m8h 29m11h 50m15h 14m18h 40m21h 8m19h 42m16h 18m12h 56m9h 36m6h 17m4h 6m

Solar UV radiation in Borgarnes, Iceland

Borgarnes 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 Borgarnes UV Index data.

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