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Monthly climate in Guern, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Guern features a oceanic climate (Cfb). Temperatures typically range between 6 °C (43 °F) and 18 °C (66 °F) through the year, but rarely can drop to -7 °C (19 °F) or can rise to as high as 34 °C (93 °F). The average annual precipitation amounts to about 787 mm (31.0 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually. Guern enjoys an average of 3690 hours of sunshine throughout the year, and daylight varies from 8 hours 25 minutes to 15 hours 58 minutes per day.

Monthly average temperatures in Guern, France

The warmest months in Guern are June, July and August, with daily mean temperatures ranging from 17 to 18 °C (62 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 8 °C (43 - 46 °F) throughout the day. On average each year, Guern experiences 20 days above 25 °C (77.0 °F) and 18 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Guern. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(59°F)		19°C
(67°F)		21°C
(70°F)		25°C
(77°F)		28°C
(82°F)		33°C
(92°F)		34°C
(93°F)		34°C
(93°F)		31°C
(88°F)		23°C
(74°F)		18°C
(64°F)		14°C
(58°F)
Mean maximum13°C
(56°F)		15°C
(59°F)		18°C
(65°F)		23°C
(74°F)		24°C
(76°F)		28°C
(83°F)		31°C
(88°F)		30°C
(87°F)		26°C
(80°F)		20°C
(69°F)		16°C
(61°F)		14°C
(57°F)
Average high9°C
(48°F)		10°C
(51°F)		12°C
(54°F)		15°C
(60°F)		18°C
(65°F)		21°C
(70°F)		23°C
(74°F)		22°C
(72°F)		20°C
(69°F)		16°C
(62°F)		12°C
(54°F)		10°C
(50°F)
Daily mean6°C
(43°F)		7°C
(45°F)		8°C
(47°F)		11°C
(51°F)		13°C
(56°F)		17°C
(62°F)		18°C
(66°F)		18°C
(64°F)		16°C
(61°F)		13°C
(55°F)		9°C
(48°F)		8°C
(46°F)
Average low3°C
(38°F)		4°C
(39°F)		5°C
(41°F)		6°C
(43°F)		9°C
(48°F)		12°C
(54°F)		14°C
(57°F)		13°C
(56°F)		12°C
(53°F)		9°C
(49°F)		6°C
(43°F)		5°C
(41°F)
Mean minimum-3°C
(28°F)		-3°C
(28°F)		-1°C
(30°F)		-0°C
(32°F)		3°C
(37°F)		7°C
(45°F)		10°C
(50°F)		8°C
(47°F)		6°C
(43°F)		4°C
(39°F)		0°C
(33°F)		-2°C
(29°F)
Minimum-7°C
(20°F)		-6°C
(21°F)		-7°C
(19°F)		-3°C
(27°F)		-2°C
(30°F)		6°C
(43°F)		8°C
(46°F)		7°C
(46°F)		4°C
(39°F)		-0°C
(32°F)		-1°C
(31°F)		-2°C
(28°F)

Compare climate in Guern with other places

Compare temperature, precipitation, sunshine, UV index in Guern, France with other places around the world.

Monthly average precipitation in Guern, France

Guern usually has the most precipitation in June, October and December, with an average of 12 rainy days and 95 mm (3.7 inches) of precipitation per month. The driest months in Guern are April, July and September. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Guern. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)48 (1.9)71 (2.8)62 (2.5)44 (1.7)68 (2.7)89 (3.5)45 (1.8)48 (1.9)41 (1.6)93 (3.7)76 (3.0)101 (4.0)
Average precipitation days (≥ 1 mm)8121381211998131214

Monthly sunshine hours in Guern, France

The sunniest months in Guern are May, June and July, when the sun shines an average of 13 hours 38 minutes a day. Least sunny months in Guern: January, February and December receive an average of 5 hours 53 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Guern. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours143206298357413410431399337278229186
Mean daily daylight hours8h 51m10h 13m11h 56m13h 41m15h 11m15h 58m15h 33m14h 12m12h 31m10h 46m9h 14m8h 25m

Solar UV radiation in Guern, France

Guern experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 9, which corresponds to the Very 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 2. For more detailed information, check out our hourly Guern UV Index data.

Average daily maximum UV levels by month for Guern. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235689986522