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Monthly climate in Jalasjaervi, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Jalasjaervi features a subarctic climate (Dfc). Temperatures typically range between -5 °C (22 °F) and 17 °C (62 °F) through the year, but rarely can drop to -28 °C (-19 °F) or can rise to as high as 32 °C (89 °F). The average annual precipitation amounts to about 678 mm (26.7 inches) and receives 136 rainy days on the 1 mm (0.04 inches) threshold annually. Jalasjaervi enjoys an average of 3207 hours of sunshine throughout the year, and daylight varies from 5 hours 6 minutes to 19 hours 47 minutes per day.

Monthly average temperatures in Jalasjaervi, Finland

The warmest months in Jalasjaervi are June, July and August, with daily mean temperatures ranging from 15 to 17 °C (59 - 62 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -5 to -3 °C (22 - 28 °F) throughout the day. On average each year, Jalasjaervi experiences 13 days above 25 °C (77.0 °F) and 152 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Jalasjaervi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(46°F)		7°C
(44°F)		12°C
(54°F)		21°C
(71°F)		28°C
(82°F)		32°C
(89°F)		31°C
(88°F)		31°C
(88°F)		24°C
(75°F)		19°C
(67°F)		12°C
(53°F)		5°C
(42°F)
Mean maximum4°C
(40°F)		4°C
(40°F)		9°C
(49°F)		17°C
(62°F)		24°C
(76°F)		26°C
(80°F)		28°C
(82°F)		26°C
(79°F)		21°C
(69°F)		15°C
(58°F)		9°C
(48°F)		4°C
(39°F)
Average high-2°C
(29°F)		-2°C
(28°F)		2°C
(36°F)		8°C
(46°F)		14°C
(57°F)		20°C
(68°F)		21°C
(70°F)		19°C
(67°F)		14°C
(57°F)		7°C
(46°F)		3°C
(37°F)		-1°C
(31°F)
Daily mean-4°C
(24°F)		-5°C
(22°F)		-2°C
(29°F)		3°C
(38°F)		9°C
(49°F)		15°C
(60°F)		17°C
(62°F)		15°C
(59°F)		10°C
(50°F)		5°C
(41°F)		1°C
(34°F)		-3°C
(28°F)
Average low-7°C
(20°F)		-9°C
(17°F)		-6°C
(22°F)		-2°C
(30°F)		3°C
(38°F)		10°C
(49°F)		11°C
(53°F)		10°C
(51°F)		6°C
(43°F)		2°C
(36°F)		-1°C
(30°F)		-4°C
(24°F)
Mean minimum-20°C
(-4°F)		-21°C
(-6°F)		-18°C
(-0°F)		-9°C
(16°F)		-3°C
(26°F)		4°C
(40°F)		6°C
(42°F)		4°C
(39°F)		-1°C
(30°F)		-8°C
(18°F)		-10°C
(14°F)		-13°C
(8°F)
Minimum-28°C
(-19°F)		-28°C
(-17°F)		-28°C
(-17°F)		-15°C
(5°F)		-5°C
(23°F)		-1°C
(31°F)		4°C
(39°F)		3°C
(38°F)		-4°C
(26°F)		-12°C
(10°F)		-16°C
(3°F)		-26°C
(-15°F)

Compare climate in Jalasjaervi with other places

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

Monthly average precipitation in Jalasjaervi, Finland

Jalasjaervi usually has the most precipitation in August, September and October, with an average of 13 rainy days and 77 mm (3.0 inches) of precipitation per month. The driest months in Jalasjaervi are January, February and March. On average, 40 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Jalasjaervi. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)38 (1.5)39 (1.5)43 (1.7)44 (1.7)58 (2.3)60 (2.4)57 (2.2)92 (3.6)69 (2.7)69 (2.7)59 (2.3)51 (2.0)
Average precipitation days (≥ 1 mm)10811111011111413141013

Monthly sunshine hours in Jalasjaervi, Finland

The sunniest months in Jalasjaervi are May, June and July, when the sun shines an average of 15 hours 26 minutes a day. Least sunny months in Jalasjaervi: January, November and December receive an average of 1 hours 57 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Jalasjaervi. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours431472613494504964744022731699145
Mean daily daylight hours6h 5m8h 48m11h 50m14h 55m17h 54m19h 47m18h 44m15h 54m12h 52m9h 50m6h 54m5h 6m

Solar UV radiation in Jalasjaervi, Finland

Jalasjaervi 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 Jalasjaervi UV Index data.

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