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Monthly climate in Arcachon, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Arcachon features a oceanic climate (Cfb). Temperatures typically range between 8 °C (47 °F) and 21 °C (71 °F) through the year, but rarely can drop to -3 °C (27 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 951 mm (37.5 inches) and receives 134 rainy days on the 1 mm (0.04 inches) threshold annually. Arcachon enjoys an average of 3826 hours of sunshine throughout the year, and daylight varies from 8 hours 51 minutes to 15 hours 29 minutes per day.

Monthly average temperatures in Arcachon, France

The warmest months in Arcachon are July, August and September, with daily mean temperatures ranging from 19 to 21 °C (67 - 71 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 8 to 10 °C (47 - 51 °F) throughout the day. On average each year, Arcachon experiences 27 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 Arcachon. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum16°C
(61°F)		18°C
(65°F)		24°C
(75°F)		25°C
(77°F)		27°C
(81°F)		33°C
(92°F)		33°C
(92°F)		31°C
(87°F)		29°C
(85°F)		24°C
(76°F)		20°C
(68°F)		16°C
(61°F)
Mean maximum14°C
(58°F)		16°C
(61°F)		19°C
(67°F)		22°C
(72°F)		24°C
(76°F)		28°C
(82°F)		30°C
(87°F)		29°C
(85°F)		28°C
(83°F)		23°C
(74°F)		19°C
(66°F)		15°C
(60°F)
Average high10°C
(51°F)		12°C
(54°F)		14°C
(57°F)		16°C
(61°F)		18°C
(66°F)		22°C
(71°F)		24°C
(75°F)		24°C
(75°F)		22°C
(72°F)		18°C
(65°F)		14°C
(57°F)		12°C
(54°F)
Daily mean8°C
(47°F)		10°C
(50°F)		11°C
(52°F)		13°C
(56°F)		16°C
(61°F)		19°C
(67°F)		21°C
(71°F)		21°C
(71°F)		19°C
(67°F)		16°C
(61°F)		12°C
(54°F)		10°C
(51°F)
Average low7°C
(44°F)		8°C
(47°F)		9°C
(48°F)		11°C
(51°F)		14°C
(57°F)		17°C
(63°F)		19°C
(67°F)		19°C
(66°F)		17°C
(63°F)		14°C
(58°F)		10°C
(50°F)		9°C
(48°F)
Mean minimum2°C
(36°F)		3°C
(37°F)		4°C
(39°F)		6°C
(43°F)		10°C
(50°F)		14°C
(58°F)		16°C
(61°F)		15°C
(60°F)		13°C
(55°F)		9°C
(48°F)		5°C
(41°F)		4°C
(39°F)
Minimum-1°C
(31°F)		-3°C
(27°F)		-2°C
(29°F)		3°C
(38°F)		7°C
(45°F)		12°C
(54°F)		15°C
(60°F)		15°C
(59°F)		11°C
(53°F)		6°C
(44°F)		4°C
(39°F)		3°C
(37°F)

Compare climate in Arcachon with other places

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

Monthly average precipitation in Arcachon, France

Arcachon usually has the most precipitation in May, November and December, with an average of 14 rainy days and 120 mm (4.7 inches) of precipitation per month. The driest months in Arcachon are April, July and August. On average, 47 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Arcachon. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)73 (2.9)69 (2.7)71 (2.8)52 (2.0)101 (4.0)96 (3.8)44 (1.7)44 (1.7)58 (2.3)86 (3.4)108 (4.2)151 (5.9)
Average precipitation days (≥ 1 mm)11111381312879111318

Monthly sunshine hours in Arcachon, France

The sunniest months in Arcachon are June, July and August, when the sun shines an average of 13 hours 33 minutes a day. Least sunny months in Arcachon: January, February and December receive an average of 6 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Arcachon. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours176240312354399416429402345300245204
Mean daily daylight hours9h 14m10h 26m11h 56m13h 30m14h 49m15h 29m15h 8m13h 57m12h 28m10h 55m9h 34m8h 51m

Solar UV radiation in Arcachon, France

Arcachon experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 8 - 10, which corresponds to the Very High category of sun exposure. January, February and December are in the Low / Moderate exposure category. In these months, the maximum values of the UV index do not exceed 3. For more detailed information, check out our hourly Arcachon UV Index data.

Average daily maximum UV levels by month for Arcachon. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2367810987532