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Monthly climate in Osny, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Osny features a oceanic climate (Cfb). Temperatures typically range between 5 °C (40 °F) and 20 °C (68 °F) through the year, but rarely can drop to -8 °C (18 °F) or can rise to as high as 40 °C (104 °F). The average annual precipitation amounts to about 776 mm (30.6 inches) and receives 139 rainy days on the 1 mm (0.04 inches) threshold annually. Osny enjoys an average of 3501 hours of sunshine throughout the year, and daylight varies from 8 hours 18 minutes to 16 hours 5 minutes per day.

Monthly average temperatures in Osny, France

The warmest months in Osny are June, July and August, with daily mean temperatures ranging from 18 to 20 °C (65 - 68 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 5 to 6 °C (40 - 43 °F) throughout the day. On average each year, Osny experiences 36 days above 25 °C (77.0 °F) and 28 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Osny. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(58°F)		19°C
(67°F)		24°C
(75°F)		27°C
(80°F)		29°C
(84°F)		35°C
(95°F)		40°C
(104°F)		37°C
(99°F)		32°C
(90°F)		25°C
(78°F)		19°C
(66°F)		15°C
(59°F)
Mean maximum13°C
(55°F)		16°C
(61°F)		20°C
(68°F)		24°C
(76°F)		26°C
(80°F)		30°C
(86°F)		33°C
(92°F)		33°C
(91°F)		28°C
(83°F)		23°C
(74°F)		17°C
(63°F)		15°C
(59°F)
Average high7°C
(45°F)		9°C
(49°F)		12°C
(54°F)		16°C
(61°F)		19°C
(66°F)		23°C
(74°F)		25°C
(77°F)		24°C
(76°F)		21°C
(71°F)		16°C
(62°F)		11°C
(51°F)		8°C
(47°F)
Daily mean5°C
(40°F)		6°C
(43°F)		8°C
(47°F)		11°C
(52°F)		14°C
(57°F)		18°C
(65°F)		20°C
(68°F)		19°C
(67°F)		16°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
(40°F)		6°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-3°C
(26°F)		-3°C
(26°F)		-2°C
(29°F)		-1°C
(31°F)		3°C
(37°F)		8°C
(46°F)		11°C
(52°F)		9°C
(48°F)		6°C
(43°F)		3°C
(37°F)		-1°C
(31°F)		-2°C
(28°F)
Minimum-7°C
(20°F)		-6°C
(21°F)		-8°C
(18°F)		-3°C
(27°F)		1°C
(33°F)		6°C
(43°F)		8°C
(46°F)		7°C
(45°F)		4°C
(40°F)		2°C
(35°F)		-2°C
(28°F)		-3°C
(27°F)

Compare climate in Osny with other places

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

Monthly average precipitation in Osny, France

Osny usually has the most precipitation in June, October and December, with an average of 14 rainy days and 86 mm (3.4 inches) of precipitation per month. The driest months in Osny are April, July and September. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Osny. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)54 (2.1)67 (2.6)76 (3.0)36 (1.4)73 (2.9)79 (3.1)47 (1.8)58 (2.3)41 (1.6)77 (3.0)65 (2.6)101 (4.0)
Average precipitation days (≥ 1 mm)101315713128109121218

Monthly sunshine hours in Osny, France

The sunniest months in Osny are May, June and July, when the sun shines an average of 13 hours 9 minutes a day. Least sunny months in Osny: January, November and December receive an average of 5 hours 20 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Osny. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours126202270355389410410382322266201162
Mean daily daylight hours8h 45m10h 9m11h 55m13h 44m15h 17m16h 5m15h 40m14h 16m12h 32m10h 44m9h 8m8h 18m

Solar UV radiation in Osny, France

Osny experiences the highest level of ultraviolet (UV) radiation in May, June 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 Osny UV Index data.

Average daily maximum UV levels by month for Osny. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)234689886421