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Monthly climate in Joensuu, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Joensuu features a subarctic climate (Dfc). Temperatures typically range between -7 °C (20 °F) and 17 °C (63 °F) through the year, but rarely can drop to -29 °C (-19 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 799 mm (31.5 inches) and receives 155 rainy days on the 1 mm (0.04 inches) threshold annually. Joensuu enjoys an average of 3002 hours of sunshine throughout the year, and daylight varies from 5 hours 3 minutes to 19 hours 50 minutes per day.

Monthly average temperatures in Joensuu, Finland

The warmest months in Joensuu are June, July and August, with daily mean temperatures ranging from 15 to 17 °C (60 - 63 °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 - 25 °F) throughout the day. On average each year, Joensuu experiences 9 days above 25 °C (77.0 °F) and 147 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Joensuu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum5°C
(41°F)		4°C
(40°F)		9°C
(49°F)		17°C
(64°F)		26°C
(79°F)		31°C
(87°F)		31°C
(88°F)		29°C
(85°F)		22°C
(72°F)		17°C
(62°F)		10°C
(50°F)		3°C
(38°F)
Mean maximum3°C
(37°F)		3°C
(37°F)		6°C
(44°F)		12°C
(55°F)		21°C
(69°F)		25°C
(78°F)		27°C
(81°F)		24°C
(76°F)		19°C
(66°F)		13°C
(55°F)		7°C
(45°F)		2°C
(36°F)
Average high-4°C
(25°F)		-5°C
(24°F)		-0°C
(32°F)		5°C
(41°F)		12°C
(54°F)		19°C
(66°F)		20°C
(69°F)		18°C
(65°F)		13°C
(55°F)		7°C
(44°F)		2°C
(36°F)		-2°C
(28°F)
Daily mean-6°C
(21°F)		-7°C
(20°F)		-3°C
(26°F)		1°C
(35°F)		8°C
(47°F)		16°C
(60°F)		17°C
(63°F)		15°C
(60°F)		10°C
(51°F)		5°C
(41°F)		1°C
(33°F)		-4°C
(25°F)
Average low-9°C
(17°F)		-10°C
(15°F)		-7°C
(20°F)		-2°C
(28°F)		4°C
(40°F)		12°C
(53°F)		14°C
(57°F)		13°C
(55°F)		8°C
(47°F)		4°C
(39°F)		-1°C
(31°F)		-5°C
(22°F)
Mean minimum-23°C
(-10°F)		-21°C
(-6°F)		-18°C
(-0°F)		-10°C
(15°F)		-2°C
(28°F)		6°C
(43°F)		8°C
(47°F)		8°C
(47°F)		2°C
(36°F)		-3°C
(26°F)		-10°C
(15°F)		-14°C
(7°F)
Minimum-29°C
(-19°F)		-27°C
(-17°F)		-25°C
(-14°F)		-14°C
(8°F)		-4°C
(25°F)		2°C
(37°F)		7°C
(45°F)		7°C
(45°F)		-0°C
(32°F)		-6°C
(21°F)		-16°C
(3°F)		-23°C
(-9°F)

Compare climate in Joensuu with other places

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

Monthly average precipitation in Joensuu, Finland

Joensuu usually has the most precipitation in July, August and September, with an average of 14 rainy days and 92 mm (3.6 inches) of precipitation per month. The driest months in Joensuu are January, February and April. On average, 46 mm (1.8 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Joensuu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)48 (1.9)48 (1.9)50 (2.0)41 (1.6)55 (2.2)58 (2.3)89 (3.5)99 (3.9)87 (3.4)86 (3.4)64 (2.5)73 (2.9)
Average precipitation days (≥ 1 mm)13121291111121614161316

Monthly sunshine hours in Joensuu, Finland

The sunniest months in Joensuu are May, June and July, when the sun shines an average of 15 hours 5 minutes a day. Least sunny months in Joensuu: January, November and December receive an average of 1 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Joensuu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours341272383434184924773822531496025
Mean daily daylight hours6h 3m8h 47m11h 50m14h 56m17h 56m19h 50m18h 47m15h 56m12h 53m9h 49m6h 52m5h 3m

Solar UV radiation in Joensuu, Finland

Joensuu 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 Joensuu UV Index data.

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