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Monthly climate in Chalo-Saint-Mars, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Chalo-Saint-Mars features a oceanic climate (Cfb). Temperatures typically range between 4 °C (40 °F) and 20 °C (69 °F) through the year, but rarely can drop to -11 °C (13 °F) or can rise to as high as 40 °C (105 °F). The average annual precipitation amounts to about 741 mm (29.2 inches) and receives 131 rainy days on the 1 mm (0.04 inches) threshold annually. Chalo-Saint-Mars enjoys an average of 3520 hours of sunshine throughout the year, and daylight varies from 8 hours 21 minutes to 16 hours 2 minutes per day.

Monthly average temperatures in Chalo-Saint-Mars, France

The warmest months in Chalo-Saint-Mars are June, July and August, with daily mean temperatures ranging from 18 to 20 °C (66 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 6 °C (40 - 43 °F) throughout the day. On average each year, Chalo-Saint-Mars experiences 44 days above 25 °C (77.0 °F) and 30 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Chalo-Saint-Mars. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		20°C
(69°F)		24°C
(75°F)		27°C
(81°F)		30°C
(86°F)		35°C
(96°F)		40°C
(105°F)		37°C
(98°F)		34°C
(94°F)		26°C
(79°F)		19°C
(66°F)		15°C
(59°F)
Mean maximum13°C
(56°F)		16°C
(61°F)		21°C
(69°F)		24°C
(76°F)		27°C
(80°F)		31°C
(87°F)		34°C
(94°F)		33°C
(92°F)		30°C
(85°F)		24°C
(75°F)		17°C
(63°F)		15°C
(59°F)
Average high7°C
(45°F)		10°C
(50°F)		12°C
(55°F)		16°C
(61°F)		19°C
(66°F)		23°C
(74°F)		26°C
(78°F)		25°C
(78°F)		22°C
(72°F)		17°C
(62°F)		11°C
(52°F)		8°C
(47°F)
Daily mean4°C
(40°F)		6°C
(43°F)		8°C
(47°F)		11°C
(52°F)		14°C
(58°F)		18°C
(66°F)		20°C
(69°F)		20°C
(68°F)		17°C
(62°F)		13°C
(55°F)		8°C
(46°F)		6°C
(43°F)
Average low2°C
(36°F)		3°C
(37°F)		4°C
(39°F)		5°C
(42°F)		9°C
(48°F)		13°C
(56°F)		15°C
(59°F)		14°C
(58°F)		12°C
(53°F)		9°C
(49°F)		5°C
(41°F)		4°C
(39°F)
Mean minimum-4°C
(25°F)		-4°C
(25°F)		-3°C
(28°F)		-1°C
(30°F)		2°C
(36°F)		8°C
(46°F)		10°C
(51°F)		9°C
(48°F)		6°C
(43°F)		2°C
(35°F)		-2°C
(29°F)		-3°C
(27°F)
Minimum-8°C
(17°F)		-11°C
(13°F)		-9°C
(16°F)		-3°C
(26°F)		-0°C
(32°F)		6°C
(43°F)		8°C
(46°F)		6°C
(44°F)		4°C
(40°F)		1°C
(34°F)		-4°C
(25°F)		-4°C
(25°F)

Compare climate in Chalo-Saint-Mars with other places

Compare temperature, precipitation, sunshine, UV index in Chalo-Saint-Mars, France with other places around the world.

Monthly average precipitation in Chalo-Saint-Mars, France

Chalo-Saint-Mars usually has the most precipitation in May, June and December, with an average of 13 rainy days and 80 mm (3.2 inches) of precipitation per month. The driest months in Chalo-Saint-Mars are April, July and September. On average, 40 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Chalo-Saint-Mars. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)53 (2.1)62 (2.4)70 (2.8)31 (1.2)73 (2.9)74 (2.9)43 (1.7)57 (2.3)46 (1.8)73 (2.9)65 (2.5)94 (3.7)
Average precipitation days (≥ 1 mm)10131461311798111217

Monthly sunshine hours in Chalo-Saint-Mars, France

The sunniest months in Chalo-Saint-Mars are May, June and July, when the sun shines an average of 13 hours 10 minutes a day. Least sunny months in Chalo-Saint-Mars: January, February and December receive an average of 5 hours 30 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Chalo-Saint-Mars. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours130205270354391408411385323266206165
Mean daily daylight hours8h 48m10h 11m11h 55m13h 42m15h 14m16h 2m15h 36m14h 14m12h 31m10h 45m9h 11m8h 21m

Solar UV radiation in Chalo-Saint-Mars, France

Chalo-Saint-Mars 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 Chalo-Saint-Mars UV Index data.

Average daily maximum UV levels by month for Chalo-Saint-Mars. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235689986421