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Monthly climate in Lanhouarneau, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Lanhouarneau features a oceanic climate (Cfb). Temperatures typically range between 7 °C (45 °F) and 17 °C (64 °F) through the year, but rarely can drop to -5 °C (23 °F) or can rise to as high as 32 °C (89 °F). The average annual precipitation amounts to about 923 mm (36.3 inches) and receives 159 rainy days on the 1 mm (0.04 inches) threshold annually. Lanhouarneau enjoys an average of 3647 hours of sunshine throughout the year, and daylight varies from 8 hours 20 minutes to 16 hours 3 minutes per day.

Monthly average temperatures in Lanhouarneau, France

The warmest months in Lanhouarneau are June, July and August, with daily mean temperatures ranging from 16 to 17 °C (60 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 7 to 9 °C (45 - 48 °F) throughout the day. On average each year, Lanhouarneau experiences 7 days above 25 °C (77.0 °F) and 3 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Lanhouarneau. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		19°C
(67°F)		21°C
(70°F)		24°C
(76°F)		27°C
(81°F)		32°C
(89°F)		30°C
(86°F)		28°C
(83°F)		30°C
(87°F)		21°C
(71°F)		17°C
(63°F)		14°C
(58°F)
Mean maximum13°C
(56°F)		15°C
(58°F)		17°C
(64°F)		23°C
(73°F)		23°C
(74°F)		26°C
(80°F)		29°C
(84°F)		26°C
(80°F)		25°C
(78°F)		19°C
(67°F)		16°C
(61°F)		14°C
(57°F)
Average high10°C
(49°F)		10°C
(51°F)		12°C
(53°F)		14°C
(58°F)		17°C
(62°F)		19°C
(67°F)		21°C
(70°F)		20°C
(69°F)		19°C
(66°F)		16°C
(60°F)		12°C
(54°F)		11°C
(51°F)
Daily mean7°C
(45°F)		8°C
(47°F)		9°C
(48°F)		10°C
(51°F)		13°C
(55°F)		16°C
(60°F)		17°C
(64°F)		17°C
(62°F)		15°C
(60°F)		13°C
(55°F)		10°C
(50°F)		9°C
(48°F)
Average low5°C
(42°F)		6°C
(42°F)		6°C
(43°F)		7°C
(45°F)		9°C
(49°F)		12°C
(54°F)		14°C
(57°F)		14°C
(57°F)		12°C
(54°F)		10°C
(51°F)		8°C
(46°F)		7°C
(45°F)
Mean minimum-1°C
(31°F)		-0°C
(32°F)		1°C
(34°F)		2°C
(36°F)		5°C
(40°F)		8°C
(47°F)		11°C
(52°F)		10°C
(50°F)		8°C
(46°F)		5°C
(41°F)		3°C
(38°F)		1°C
(35°F)
Minimum-4°C
(25°F)		-4°C
(26°F)		-5°C
(23°F)		0°C
(33°F)		2°C
(36°F)		7°C
(44°F)		10°C
(50°F)		9°C
(48°F)		7°C
(44°F)		2°C
(36°F)		2°C
(35°F)		1°C
(33°F)

Compare climate in Lanhouarneau with other places

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

Monthly average precipitation in Lanhouarneau, France

Lanhouarneau usually has the most precipitation in February, October and December, with an average of 16 rainy days and 109 mm (4.3 inches) of precipitation per month. The driest months in Lanhouarneau are April, July and September. On average, 49 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Lanhouarneau. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)74 (2.9)92 (3.6)76 (3.0)48 (1.9)67 (2.6)86 (3.4)47 (1.8)58 (2.3)51 (2.0)109 (4.3)88 (3.5)127 (5.0)
Average precipitation days (≥ 1 mm)121516101213101210161518

Monthly sunshine hours in Lanhouarneau, France

The sunniest months in Lanhouarneau are May, June and July, when the sun shines an average of 13 hours 36 minutes a day. Least sunny months in Lanhouarneau: January, February and December receive an average of 5 hours 40 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Lanhouarneau. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours134205295357412410429393337273222176
Mean daily daylight hours8h 47m10h 11m11h 55m13h 43m15h 15m16h 3m15h 37m14h 15m12h 31m10h 45m9h 10m8h 20m

Solar UV radiation in Lanhouarneau, France

Lanhouarneau 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 Lanhouarneau UV Index data.

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