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Monthly climate in Mont-de-Marsan, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Mont-de-Marsan features a oceanic climate (Cfb). Temperatures typically range between 6 °C (44 °F) and 23 °C (73 °F) through the year, but rarely can drop to -7 °C (19 °F) or can rise to as high as 42 °C (107 °F). The average annual precipitation amounts to about 837 mm (33.0 inches) and receives 129 rainy days on the 1 mm (0.04 inches) threshold annually. Mont-de-Marsan enjoys an average of 3765 hours of sunshine throughout the year, and daylight varies from 8 hours 56 minutes to 15 hours 23 minutes per day.

Monthly average temperatures in Mont-de-Marsan, France

The warmest months in Mont-de-Marsan are June, July and August, with daily mean temperatures ranging from 21 to 23 °C (70 - 73 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 6 to 9 °C (44 - 49 °F) throughout the day. On average each year, Mont-de-Marsan experiences 92 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 Mont-de-Marsan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum21°C
(71°F)		27°C
(81°F)		28°C
(84°F)		30°C
(86°F)		35°C
(95°F)		41°C
(105°F)		42°C
(107°F)		40°C
(105°F)		37°C
(98°F)		31°C
(89°F)		25°C
(78°F)		19°C
(67°F)
Mean maximum17°C
(64°F)		22°C
(71°F)		24°C
(76°F)		27°C
(81°F)		31°C
(88°F)		35°C
(96°F)		38°C
(101°F)		37°C
(100°F)		34°C
(93°F)		29°C
(84°F)		23°C
(73°F)		18°C
(65°F)
Average high11°C
(51°F)		15°C
(59°F)		17°C
(62°F)		20°C
(68°F)		23°C
(74°F)		27°C
(80°F)		29°C
(85°F)		30°C
(85°F)		27°C
(80°F)		21°C
(70°F)		15°C
(59°F)		12°C
(54°F)
Daily mean6°C
(44°F)		9°C
(49°F)		11°C
(52°F)		14°C
(57°F)		17°C
(63°F)		21°C
(70°F)		23°C
(73°F)		23°C
(73°F)		20°C
(68°F)		15°C
(60°F)		10°C
(50°F)		8°C
(48°F)
Average low3°C
(37°F)		5°C
(41°F)		6°C
(44°F)		8°C
(47°F)		11°C
(53°F)		15°C
(60°F)		17°C
(63°F)		17°C
(62°F)		14°C
(57°F)		11°C
(51°F)		6°C
(43°F)		5°C
(42°F)
Mean minimum-4°C
(26°F)		-1°C
(31°F)		-1°C
(31°F)		1°C
(34°F)		5°C
(42°F)		11°C
(51°F)		12°C
(55°F)		12°C
(53°F)		8°C
(46°F)		4°C
(40°F)		-0°C
(31°F)		-2°C
(29°F)
Minimum-7°C
(19°F)		-5°C
(23°F)		-4°C
(25°F)		-2°C
(28°F)		2°C
(36°F)		8°C
(47°F)		11°C
(52°F)		11°C
(51°F)		6°C
(43°F)		2°C
(37°F)		-3°C
(27°F)		-5°C
(24°F)

Compare climate in Mont-de-Marsan with other places

Compare temperature, precipitation, sunshine, UV index in Mont-de-Marsan, France with other places around the world.

Monthly average precipitation in Mont-de-Marsan, France

Mont-de-Marsan usually has the most precipitation in May, June and December, with an average of 13 rainy days and 99 mm (3.9 inches) of precipitation per month. The driest months in Mont-de-Marsan are July, August and September. On average, 48 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Mont-de-Marsan. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)62 (2.4)59 (2.3)63 (2.5)62 (2.4)100 (3.9)83 (3.3)44 (1.7)47 (1.9)53 (2.1)69 (2.7)82 (3.2)113 (4.5)
Average precipitation days (≥ 1 mm)10101410141287891215

Monthly sunshine hours in Mont-de-Marsan, France

The sunniest months in Mont-de-Marsan are June, July and August, when the sun shines an average of 13 hours 14 minutes a day. Least sunny months in Mont-de-Marsan: January, November and December receive an average of 6 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Mont-de-Marsan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours175241311346385404420393340296235212
Mean daily daylight hours9h 18m10h 28m11h 57m13h 27m14h 45m15h 23m15h 3m13h 54m12h 27m10h 57m9h 38m8h 56m

Solar UV radiation in Mont-de-Marsan, France

Mont-de-Marsan experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 9 - 10, which corresponds to the Very High category of sun exposure. January, November 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 Mont-de-Marsan UV Index data.

Average daily maximum UV levels by month for Mont-de-Marsan. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)24578101097532