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Monthly climate in Treglonou, France

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Treglonou features a oceanic climate (Cfb). Temperatures typically range between 8 °C (47 °F) and 17 °C (63 °F) through the year, but rarely can drop to -4 °C (25 °F) or can rise to as high as 29 °C (84 °F). The average annual precipitation amounts to about 942 mm (37.1 inches) and receives 159 rainy days on the 1 mm (0.04 inches) threshold annually. Treglonou enjoys an average of 3647 hours of sunshine throughout the year, and daylight varies from 8 hours 20 minutes to 16 hours 2 minutes per day.

Monthly average temperatures in Treglonou, France

The warmest months in Treglonou are July, August and September, with daily mean temperatures ranging from 16 to 17 °C (60 - 63 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from 8 to 9 °C (47 - 49 °F) throughout the day. On average each year, Treglonou experiences 2 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 Treglonou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(58°F)		17°C
(63°F)		19°C
(66°F)		22°C
(73°F)		25°C
(77°F)		29°C
(84°F)		29°C
(84°F)		26°C
(79°F)		28°C
(83°F)		20°C
(68°F)		16°C
(62°F)		14°C
(57°F)
Mean maximum13°C
(56°F)		14°C
(57°F)		16°C
(61°F)		20°C
(69°F)		21°C
(70°F)		24°C
(76°F)		26°C
(80°F)		24°C
(75°F)		24°C
(75°F)		18°C
(65°F)		16°C
(61°F)		14°C
(57°F)
Average high10°C
(50°F)		10°C
(51°F)		11°C
(53°F)		13°C
(56°F)		16°C
(60°F)		18°C
(64°F)		20°C
(68°F)		19°C
(67°F)		18°C
(65°F)		15°C
(60°F)		12°C
(55°F)		11°C
(52°F)
Daily mean8°C
(47°F)		9°C
(48°F)		9°C
(49°F)		11°C
(51°F)		13°C
(55°F)		15°C
(60°F)		17°C
(63°F)		17°C
(62°F)		16°C
(60°F)		13°C
(56°F)		11°C
(52°F)		10°C
(50°F)
Average low6°C
(44°F)		7°C
(44°F)		7°C
(45°F)		8°C
(47°F)		10°C
(51°F)		13°C
(56°F)		15°C
(58°F)		14°C
(58°F)		13°C
(56°F)		11°C
(53°F)		9°C
(49°F)		8°C
(47°F)
Mean minimum1°C
(35°F)		2°C
(35°F)		3°C
(37°F)		4°C
(39°F)		6°C
(44°F)		10°C
(50°F)		12°C
(54°F)		12°C
(53°F)		10°C
(50°F)		7°C
(45°F)		5°C
(42°F)		3°C
(38°F)
Minimum-2°C
(29°F)		-2°C
(29°F)		-4°C
(25°F)		3°C
(37°F)		5°C
(41°F)		9°C
(48°F)		11°C
(52°F)		11°C
(52°F)		9°C
(48°F)		4°C
(40°F)		4°C
(39°F)		2°C
(37°F)

Compare climate in Treglonou with other places

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

Monthly average precipitation in Treglonou, France

Treglonou usually has the most precipitation in October, November and December, with an average of 17 rainy days and 118 mm (4.6 inches) of precipitation per month. The driest months in Treglonou are April, July and September. On average, 47 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Treglonou. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)81 (3.2)98 (3.9)76 (3.0)44 (1.7)57 (2.3)75 (3.0)46 (1.8)59 (2.3)51 (2.0)114 (4.5)99 (3.9)140 (5.5)
Average precipitation days (≥ 1 mm)14161681112101110171618

Monthly sunshine hours in Treglonou, France

The sunniest months in Treglonou are May, June and July, when the sun shines an average of 13 hours 36 minutes a day. Least sunny months in Treglonou: January, February 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 Treglonou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours134205295357412410429393337273222176
Mean daily daylight hours8h 47m10h 11m11h 55m13h 43m15h 15m16h 2m15h 37m14h 15m12h 31m10h 45m9h 10m8h 20m

Solar UV radiation in Treglonou, France

Treglonou 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 Treglonou UV Index data.

Average daily maximum UV levels by month for Treglonou. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)235689986522