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Monthly climate in Seyssel, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Seyssel features a oceanic climate (Cfb). Temperatures typically range between 2 °C (35 °F) and 20 °C (69 °F) through the year, but rarely can drop to -12 °C (11 °F) or can rise to as high as 35 °C (95 °F). The average annual precipitation amounts to about 1646 mm (64.8 inches) and receives 156 rainy days on the 1 mm (0.04 inches) threshold annually. Seyssel enjoys an average of 3530 hours of sunshine throughout the year, and daylight varies from 8 hours 42 minutes to 15 hours 40 minutes per day.

Monthly average temperatures in Seyssel, France

The warmest months in Seyssel are June, July and August, with daily mean temperatures ranging from 18 to 20 °C (65 - 69 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 2 to 5 °C (35 - 40 °F) throughout the day. On average each year, Seyssel experiences 46 days above 25 °C (77.0 °F) and 61 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Seyssel. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum15°C
(59°F)		18°C
(65°F)		21°C
(71°F)		25°C
(78°F)		29°C
(85°F)		35°C
(95°F)		35°C
(95°F)		35°C
(95°F)		29°C
(84°F)		23°C
(73°F)		19°C
(66°F)		14°C
(58°F)
Mean maximum11°C
(52°F)		16°C
(61°F)		19°C
(67°F)		23°C
(74°F)		26°C
(79°F)		28°C
(83°F)		32°C
(90°F)		33°C
(91°F)		27°C
(81°F)		21°C
(71°F)		17°C
(62°F)		12°C
(54°F)
Average high5°C
(41°F)		9°C
(48°F)		12°C
(54°F)		16°C
(61°F)		19°C
(66°F)		23°C
(74°F)		26°C
(78°F)		25°C
(78°F)		21°C
(70°F)		16°C
(61°F)		9°C
(49°F)		6°C
(43°F)
Daily mean2°C
(35°F)		5°C
(40°F)		7°C
(45°F)		10°C
(51°F)		14°C
(57°F)		18°C
(65°F)		20°C
(69°F)		20°C
(68°F)		16°C
(61°F)		11°C
(52°F)		6°C
(42°F)		3°C
(38°F)
Average low-1°C
(30°F)		1°C
(34°F)		2°C
(36°F)		5°C
(41°F)		9°C
(48°F)		13°C
(56°F)		15°C
(59°F)		15°C
(59°F)		11°C
(52°F)		7°C
(45°F)		3°C
(37°F)		0°C
(33°F)
Mean minimum-6°C
(22°F)		-5°C
(24°F)		-4°C
(25°F)		-2°C
(29°F)		3°C
(37°F)		9°C
(48°F)		10°C
(50°F)		9°C
(48°F)		5°C
(41°F)		2°C
(35°F)		-2°C
(29°F)		-4°C
(24°F)
Minimum-12°C
(11°F)		-11°C
(12°F)		-11°C
(13°F)		-4°C
(25°F)		-0°C
(32°F)		6°C
(44°F)		10°C
(50°F)		6°C
(44°F)		3°C
(38°F)		0°C
(33°F)		-3°C
(27°F)		-5°C
(22°F)

Compare climate in Seyssel with other places

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

Monthly average precipitation in Seyssel, France

Seyssel usually has the most precipitation in March, May and December, with an average of 16 rainy days and 198 mm (7.8 inches) of precipitation per month. The driest months in Seyssel are April, August and September. On average, 90 mm (3.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Seyssel. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)141 (5.5)112 (4.4)154 (6.1)68 (2.7)184 (7.2)149 (5.9)115 (4.5)110 (4.3)90 (3.6)139 (5.5)128 (5.1)255 (10.0)
Average precipitation days (≥ 1 mm)101114101715121310121418

Monthly sunshine hours in Seyssel, France

The sunniest months in Seyssel are June, July and August, when the sun shines an average of 12 hours 59 minutes a day. Least sunny months in Seyssel: January, November 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 Seyssel. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours144218288348358397412385326272202175
Mean daily daylight hours9h 5m10h 21m11h 56m13h 34m14h 57m15h 40m15h 17m14h 3m12h 29m10h 52m9h 26m8h 42m

Solar UV radiation in Seyssel, France

Seyssel 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 Seyssel UV Index data.

Average daily maximum UV levels by month for Seyssel. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)2366810986532