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Monthly climate in Groix, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Groix features a oceanic climate (Cfb). Temperatures typically range between 8 °C (47 °F) and 18 °C (66 °F) through the year, but rarely can drop to -4 °C (26 °F) or can rise to as high as 27 °C (81 °F). The average annual precipitation amounts to about 864 mm (34.0 inches) and receives 136 rainy days on the 1 mm (0.04 inches) threshold annually. Groix enjoys an average of 3727 hours of sunshine throughout the year, and daylight varies from 8 hours 27 minutes to 15 hours 55 minutes per day.

Monthly average temperatures in Groix, France

The warmest months in Groix 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 March, when daily mean temperatures range from 8 to 9 °C (47 - 49 °F) throughout the day. On average each year, Groix experiences 3 days above 25 °C (77.0 °F) and 1 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Groix. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(57°F)		14°C
(58°F)		17°C
(62°F)		20°C
(68°F)		23°C
(74°F)		26°C
(79°F)		26°C
(80°F)		27°C
(81°F)		26°C
(79°F)		19°C
(67°F)		17°C
(62°F)		14°C
(57°F)
Mean maximum13°C
(55°F)		13°C
(56°F)		15°C
(59°F)		18°C
(65°F)		21°C
(69°F)		23°C
(74°F)		26°C
(79°F)		25°C
(77°F)		23°C
(74°F)		18°C
(65°F)		16°C
(61°F)		14°C
(57°F)
Average high10°C
(49°F)		10°C
(51°F)		11°C
(52°F)		13°C
(57°F)		16°C
(61°F)		19°C
(66°F)		21°C
(70°F)		20°C
(68°F)		19°C
(66°F)		16°C
(61°F)		13°C
(55°F)		11°C
(52°F)
Daily mean8°C
(47°F)		9°C
(48°F)		9°C
(49°F)		11°C
(52°F)		14°C
(57°F)		17°C
(62°F)		18°C
(66°F)		18°C
(65°F)		17°C
(62°F)		14°C
(57°F)		11°C
(52°F)		10°C
(50°F)
Average low6°C
(44°F)		7°C
(45°F)		7°C
(46°F)		9°C
(48°F)		11°C
(52°F)		14°C
(58°F)		16°C
(61°F)		16°C
(61°F)		14°C
(58°F)		12°C
(54°F)		9°C
(49°F)		8°C
(47°F)
Mean minimum2°C
(35°F)		2°C
(35°F)		3°C
(37°F)		4°C
(40°F)		7°C
(45°F)		11°C
(52°F)		13°C
(56°F)		13°C
(55°F)		11°C
(51°F)		8°C
(47°F)		5°C
(41°F)		4°C
(39°F)
Minimum-2°C
(29°F)		-3°C
(27°F)		-4°C
(26°F)		3°C
(37°F)		5°C
(41°F)		10°C
(51°F)		11°C
(53°F)		12°C
(54°F)		9°C
(49°F)		5°C
(42°F)		3°C
(37°F)		3°C
(37°F)

Compare climate in Groix with other places

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

Monthly average precipitation in Groix, France

Groix usually has the most precipitation in October, November and December, with an average of 14 rainy days and 110 mm (4.3 inches) of precipitation per month. The driest months in Groix are April, July and September. On average, 45 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Groix. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)65 (2.5)89 (3.5)71 (2.8)43 (1.7)60 (2.3)63 (2.5)47 (1.8)53 (2.1)46 (1.8)100 (4.0)98 (3.9)130 (5.1)
Average precipitation days (≥ 1 mm)111314710118108131417

Monthly sunshine hours in Groix, France

The sunniest months in Groix are May, June and July, when the sun shines an average of 13 hours 45 minutes a day. Least sunny months in Groix: January, February and December receive an average of 5 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Groix. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours145208304360418415432402339280233186
Mean daily daylight hours8h 53m10h 14m11h 56m13h 40m15h 9m15h 55m15h 31m14h 11m12h 31m10h 47m9h 15m8h 27m

Solar UV radiation in Groix, France

Groix 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 Groix UV Index data.

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