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Monthly climate in Karis, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Karis features a humid continental climate (Dfb). Temperatures typically range between -2 °C (28 °F) and 18 °C (64 °F) through the year, but rarely can drop to -18 °C (0 °F) or can rise to as high as 29 °C (85 °F). The average annual precipitation amounts to about 789 mm (31.1 inches) and receives 141 rainy days on the 1 mm (0.04 inches) threshold annually. Karis enjoys an average of 3383 hours of sunshine throughout the year, and daylight varies from 5 hours 58 minutes to 18 hours 43 minutes per day.

Monthly average temperatures in Karis, Finland

The warmest months in Karis are June, July and August, with daily mean temperatures ranging from 15 to 18 °C (60 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -2 to 0 °C (28 - 32 °F) throughout the day. On average each year, Karis experiences 4 days above 25 °C (77.0 °F) and 93 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Karis. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(46°F)		6°C
(43°F)		10°C
(50°F)		15°C
(59°F)		22°C
(72°F)		26°C
(79°F)		29°C
(85°F)		27°C
(80°F)		21°C
(69°F)		15°C
(60°F)		12°C
(54°F)		7°C
(45°F)
Mean maximum5°C
(41°F)		4°C
(40°F)		7°C
(45°F)		11°C
(53°F)		18°C
(65°F)		21°C
(70°F)		25°C
(78°F)		23°C
(74°F)		19°C
(66°F)		14°C
(57°F)		10°C
(51°F)		6°C
(43°F)
Average high1°C
(33°F)		-1°C
(31°F)		2°C
(36°F)		6°C
(43°F)		11°C
(53°F)		18°C
(64°F)		20°C
(68°F)		19°C
(66°F)		15°C
(59°F)		10°C
(50°F)		6°C
(43°F)		2°C
(36°F)
Daily mean-1°C
(30°F)		-2°C
(28°F)		-0°C
(32°F)		4°C
(39°F)		9°C
(48°F)		15°C
(60°F)		18°C
(64°F)		17°C
(63°F)		13°C
(55°F)		8°C
(47°F)		5°C
(41°F)		1°C
(33°F)
Average low-3°C
(27°F)		-4°C
(25°F)		-2°C
(28°F)		1°C
(34°F)		6°C
(43°F)		12°C
(54°F)		15°C
(59°F)		15°C
(59°F)		11°C
(52°F)		6°C
(44°F)		3°C
(38°F)		-1°C
(31°F)
Mean minimum-12°C
(10°F)		-12°C
(11°F)		-10°C
(15°F)		-4°C
(25°F)		-0°C
(32°F)		7°C
(45°F)		10°C
(51°F)		10°C
(51°F)		5°C
(41°F)		-1°C
(31°F)		-3°C
(27°F)		-6°C
(21°F)
Minimum-18°C
(-0°F)		-16°C
(3°F)		-16°C
(3°F)		-6°C
(22°F)		-1°C
(30°F)		4°C
(40°F)		9°C
(48°F)		9°C
(49°F)		2°C
(36°F)		-2°C
(28°F)		-6°C
(22°F)		-14°C
(8°F)

Compare climate in Karis with other places

Compare temperature, precipitation, sunshine, UV index in Karis, Finland with other places around the world.

Monthly average precipitation in Karis, Finland

Karis usually has the most precipitation in August, October and December, with an average of 15 rainy days and 92 mm (3.6 inches) of precipitation per month. The driest months in Karis are April, May and June. On average, 43 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Karis. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)60 (2.3)50 (2.0)55 (2.2)36 (1.4)47 (1.9)46 (1.8)73 (2.9)86 (3.4)71 (2.8)110 (4.3)76 (3.0)80 (3.1)
Average precipitation days (≥ 1 mm)131111887101213181317

Monthly sunshine hours in Karis, Finland

The sunniest months in Karis are May, June and July, when the sun shines an average of 15 hours 30 minutes a day. Least sunny months in Karis: January, November and December receive an average of 2 hours 43 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Karis. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours6015726336945548948241130220012267
Mean daily daylight hours6h 47m9h 8m11h 51m14h 38m17h 13m18h 43m17h 54m15h 30m12h 47m10h 3m7h 28m5h 58m

Solar UV radiation in Karis, Finland

Karis experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 5 - 7, which corresponds to the Moderate / High category of sun exposure. January, February and November are in the Low exposure category. In these months, the maximum values of the UV index do not exceed 1. For more detailed information, check out our hourly Karis UV Index data.

Average daily maximum UV levels by month for Karis. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)113457754211