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Monthly climate in Ouessant, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ouessant features a oceanic climate (Cfb). Temperatures typically range between 10 °C (50 °F) and 16 °C (62 °F) through the year, but rarely can drop to -1 °C (31 °F) or can rise to as high as 23 °C (74 °F). The average annual precipitation amounts to about 983 mm (38.7 inches) and receives 156 rainy days on the 1 mm (0.04 inches) threshold annually. Ouessant enjoys an average of 3644 hours of sunshine throughout the year, and daylight varies from 8 hours 21 minutes to 16 hours 1 minutes per day.

Monthly average temperatures in Ouessant, France

The warmest months in Ouessant are July, August and September, with daily mean temperatures ranging from 16 to 16 °C (60 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 10 to 10 °C (50 - 50 °F) throughout the day. On average each year, Ouessant experiences 0 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ouessant. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(59°F)		13°C
(56°F)		14°C
(58°F)		16°C
(60°F)		19°C
(66°F)		21°C
(71°F)		23°C
(74°F)		22°C
(72°F)		22°C
(71°F)		19°C
(66°F)		16°C
(61°F)		14°C
(58°F)
Mean maximum13°C
(56°F)		13°C
(55°F)		13°C
(56°F)		15°C
(58°F)		16°C
(62°F)		18°C
(66°F)		21°C
(70°F)		19°C
(67°F)		19°C
(67°F)		17°C
(63°F)		15°C
(60°F)		14°C
(57°F)
Average high11°C
(51°F)		11°C
(51°F)		11°C
(51°F)		12°C
(53°F)		13°C
(56°F)		15°C
(60°F)		17°C
(63°F)		17°C
(63°F)		16°C
(62°F)		15°C
(59°F)		13°C
(55°F)		12°C
(54°F)
Daily mean10°C
(50°F)		10°C
(50°F)		10°C
(50°F)		11°C
(51°F)		12°C
(55°F)		15°C
(58°F)		16°C
(61°F)		16°C
(62°F)		16°C
(60°F)		14°C
(57°F)		12°C
(54°F)		11°C
(52°F)
Average low9°C
(48°F)		9°C
(48°F)		9°C
(48°F)		10°C
(50°F)		12°C
(53°F)		14°C
(57°F)		16°C
(60°F)		16°C
(61°F)		15°C
(59°F)		13°C
(56°F)		11°C
(52°F)		10°C
(50°F)
Mean minimum5°C
(42°F)		5°C
(41°F)		5°C
(42°F)		7°C
(44°F)		9°C
(49°F)		12°C
(54°F)		14°C
(58°F)		14°C
(58°F)		13°C
(55°F)		11°C
(52°F)		8°C
(46°F)		6°C
(44°F)
Minimum3°C
(37°F)		1°C
(34°F)		-1°C
(31°F)		6°C
(43°F)		9°C
(48°F)		11°C
(52°F)		14°C
(57°F)		13°C
(55°F)		12°C
(53°F)		8°C
(46°F)		7°C
(45°F)		6°C
(43°F)

Compare climate in Ouessant with other places

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

Monthly average precipitation in Ouessant, France

Ouessant usually has the most precipitation in October, November and December, with an average of 18 rainy days and 131 mm (5.2 inches) of precipitation per month. The driest months in Ouessant are April, May and July. On average, 45 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ouessant. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)94 (3.7)106 (4.2)81 (3.2)41 (1.6)48 (1.9)67 (2.6)45 (1.8)59 (2.3)49 (1.9)122 (4.8)116 (4.6)155 (6.1)
Average precipitation days (≥ 1 mm)161616710108910151821

Monthly sunshine hours in Ouessant, France

The sunniest months in Ouessant are May, June and July, when the sun shines an average of 13 hours 34 minutes a day. Least sunny months in Ouessant: January, February and December receive an average of 5 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Ouessant. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours134207295358411411425389334274223177
Mean daily daylight hours8h 48m10h 11m11h 55m13h 42m15h 14m16h 1m15h 36m14h 14m12h 31m10h 45m9h 11m8h 21m

Solar UV radiation in Ouessant, France

Ouessant 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 Ouessant UV Index data.

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