nomadseason

Monthly climate in Karstula, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Karstula features a subarctic climate (Dfc). Temperatures typically range between -7 °C (20 °F) and 16 °C (62 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 728 mm (28.6 inches) and receives 147 rainy days on the 1 mm (0.04 inches) threshold annually. Karstula enjoys an average of 3038 hours of sunshine throughout the year, and daylight varies from 5 hours 2 minutes to 19 hours 52 minutes per day.

Monthly average temperatures in Karstula, Finland

The warmest months in Karstula are June, July and August, with daily mean temperatures ranging from 14 to 16 °C (58 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -7 to -4 °C (20 - 26 °F) throughout the day. On average each year, Karstula experiences 12 days above 25 °C (77.0 °F) and 165 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Karstula. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(45°F)		6°C
(44°F)		11°C
(53°F)		19°C
(66°F)		28°C
(82°F)		31°C
(88°F)		31°C
(88°F)		31°C
(87°F)		22°C
(73°F)		20°C
(68°F)		11°C
(52°F)		4°C
(40°F)
Mean maximum3°C
(38°F)		4°C
(39°F)		9°C
(48°F)		13°C
(56°F)		24°C
(76°F)		26°C
(79°F)		28°C
(82°F)		25°C
(78°F)		20°C
(68°F)		14°C
(57°F)		8°C
(47°F)		3°C
(37°F)
Average high-3°C
(26°F)		-4°C
(25°F)		1°C
(34°F)		6°C
(43°F)		13°C
(56°F)		20°C
(68°F)		21°C
(70°F)		19°C
(66°F)		13°C
(55°F)		6°C
(44°F)		2°C
(36°F)		-2°C
(29°F)
Daily mean-6°C
(22°F)		-7°C
(20°F)		-3°C
(27°F)		2°C
(35°F)		8°C
(47°F)		15°C
(60°F)		16°C
(62°F)		14°C
(58°F)		9°C
(49°F)		4°C
(40°F)		0°C
(33°F)		-4°C
(26°F)
Average low-8°C
(17°F)		-10°C
(15°F)		-7°C
(20°F)		-3°C
(27°F)		3°C
(37°F)		10°C
(49°F)		11°C
(52°F)		10°C
(50°F)		6°C
(43°F)		2°C
(36°F)		-2°C
(29°F)		-6°C
(22°F)
Mean minimum-23°C
(-9°F)		-22°C
(-8°F)		-20°C
(-3°F)		-12°C
(11°F)		-4°C
(25°F)		4°C
(39°F)		6°C
(42°F)		4°C
(39°F)		-2°C
(28°F)		-8°C
(19°F)		-12°C
(11°F)		-15°C
(6°F)
Minimum-29°C
(-20°F)		-26°C
(-15°F)		-27°C
(-16°F)		-15°C
(6°F)		-6°C
(22°F)		-2°C
(29°F)		4°C
(39°F)		3°C
(38°F)		-5°C
(23°F)		-11°C
(13°F)		-16°C
(4°F)		-23°C
(-9°F)

Compare climate in Karstula with other places

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

Monthly average precipitation in Karstula, Finland

Karstula usually has the most precipitation in August, September and October, with an average of 14 rainy days and 80 mm (3.2 inches) of precipitation per month. The driest months in Karstula are January, February and March. On average, 43 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Karstula. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)44 (1.7)43 (1.7)41 (1.6)46 (1.8)64 (2.5)61 (2.4)66 (2.6)90 (3.6)74 (2.9)76 (3.0)64 (2.5)59 (2.3)
Average precipitation days (≥ 1 mm)12911111211121413151314

Monthly sunshine hours in Karstula, Finland

The sunniest months in Karstula are May, June and July, when the sun shines an average of 15 hours 2 minutes a day. Least sunny months in Karstula: January, November and December receive an average of 1 hours 26 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Karstula. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours351352573424224924683932411516530
Mean daily daylight hours6h 1m8h 47m11h 50m14h 57m17h 57m19h 52m18h 48m15h 56m12h 53m9h 49m6h 51m5h 2m

Solar UV radiation in Karstula, Finland

Karstula experiences the highest level of ultraviolet (UV) radiation in June, July and August, when the maximum UV index can reach values of 5 - 6, 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 Karstula UV Index data.

Average daily maximum UV levels by month for Karstula. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)113456653211