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Monthly climate in Genval, Belgium

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Genval features a oceanic climate (Cfb). Temperatures typically range between 4 °C (39 °F) and 19 °C (66 °F) through the year, but rarely can drop to -9 °C (17 °F) or can rise to as high as 39 °C (102 °F). The average annual precipitation amounts to about 817 mm (32.2 inches) and receives 146 rainy days on the 1 mm (0.04 inches) threshold annually. Genval enjoys an average of 3401 hours of sunshine throughout the year, and daylight varies from 8 hours 1 minutes to 16 hours 23 minutes per day.

Monthly average temperatures in Genval, Belgium

The warmest months in Genval are June, July and August, with daily mean temperatures ranging from 18 to 19 °C (65 - 66 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from 4 to 5 °C (39 - 42 °F) throughout the day. On average each year, Genval experiences 26 days above 25 °C (77.0 °F) and 29 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Genval. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum14°C
(57°F)		19°C
(66°F)		23°C
(74°F)		27°C
(81°F)		31°C
(87°F)		33°C
(91°F)		39°C
(102°F)		36°C
(97°F)		33°C
(91°F)		25°C
(77°F)		18°C
(65°F)		15°C
(59°F)
Mean maximum12°C
(54°F)		15°C
(60°F)		19°C
(66°F)		23°C
(74°F)		26°C
(80°F)		28°C
(83°F)		31°C
(88°F)		32°C
(90°F)		28°C
(82°F)		22°C
(72°F)		16°C
(61°F)		14°C
(57°F)
Average high6°C
(43°F)		8°C
(47°F)		11°C
(52°F)		15°C
(59°F)		18°C
(65°F)		22°C
(73°F)		23°C
(74°F)		23°C
(74°F)		20°C
(68°F)		15°C
(60°F)		10°C
(50°F)		7°C
(45°F)
Daily mean4°C
(39°F)		5°C
(42°F)		7°C
(45°F)		10°C
(50°F)		13°C
(57°F)		18°C
(65°F)		19°C
(66°F)		19°C
(66°F)		15°C
(60°F)		12°C
(54°F)		7°C
(45°F)		5°C
(42°F)
Average low2°C
(35°F)		2°C
(37°F)		4°C
(39°F)		5°C
(41°F)		9°C
(48°F)		13°C
(56°F)		14°C
(58°F)		14°C
(58°F)		11°C
(52°F)		9°C
(49°F)		5°C
(41°F)		3°C
(38°F)
Mean minimum-3°C
(26°F)		-4°C
(25°F)		-3°C
(27°F)		-2°C
(29°F)		2°C
(36°F)		8°C
(47°F)		9°C
(49°F)		9°C
(49°F)		6°C
(43°F)		3°C
(38°F)		-2°C
(30°F)		-3°C
(27°F)
Minimum-7°C
(20°F)		-9°C
(17°F)		-9°C
(17°F)		-4°C
(26°F)		0°C
(33°F)		7°C
(45°F)		8°C
(46°F)		7°C
(46°F)		4°C
(39°F)		1°C
(35°F)		-3°C
(28°F)		-4°C
(24°F)

Compare climate in Genval with other places

Compare temperature, precipitation, sunshine, UV index in Genval, Belgium with other places around the world.

Monthly average precipitation in Genval, Belgium

Genval usually has the most precipitation in August, October and December, with an average of 14 rainy days and 85 mm (3.3 inches) of precipitation per month. The driest months in Genval are April, September and November. On average, 51 mm (2.0 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Genval. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)65 (2.6)70 (2.7)71 (2.8)36 (1.4)60 (2.4)72 (2.8)74 (2.9)84 (3.3)58 (2.3)78 (3.1)57 (2.3)92 (3.6)
Average precipitation days (≥ 1 mm)12121481311111410131117

Monthly sunshine hours in Genval, Belgium

The sunniest months in Genval are May, June and July, when the sun shines an average of 13 hours 1 minutes a day. Least sunny months in Genval: January, November and December receive an average of 4 hours 56 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Genval. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours121199266345393398405378318240189142
Mean daily daylight hours8h 30m10h 2m11h 55m13h 50m15h 31m16h 23m15h 55m14h 25m12h 34m10h 39m8h 56m8h 1m

Solar UV radiation in Genval, Belgium

Genval experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 7 - 8, which corresponds to the High / Very High category of sun exposure. January, February 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 Genval UV Index data.

Average daily maximum UV levels by month for Genval. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)124578875421