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Monthly climate in Hartola, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Hartola features a subarctic climate (Dfc). Temperatures typically range between -5 °C (23 °F) and 17 °C (63 °F) through the year, but rarely can drop to -29 °C (-20 °F) or can rise to as high as 30 °C (87 °F). The average annual precipitation amounts to about 733 mm (28.9 inches) and receives 145 rainy days on the 1 mm (0.04 inches) threshold annually. Hartola enjoys an average of 3028 hours of sunshine throughout the year, and daylight varies from 5 hours 27 minutes to 19 hours 20 minutes per day.

Monthly average temperatures in Hartola, Finland

The warmest months in Hartola 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 -5 to -2 °C (23 - 28 °F) throughout the day. On average each year, Hartola experiences 10 days above 25 °C (77.0 °F) and 137 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Hartola. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(45°F)		7°C
(45°F)		11°C
(53°F)		19°C
(66°F)		28°C
(83°F)		30°C
(87°F)		30°C
(87°F)		30°C
(87°F)		22°C
(72°F)		18°C
(64°F)		11°C
(52°F)		5°C
(41°F)
Mean maximum4°C
(39°F)		4°C
(39°F)		9°C
(48°F)		14°C
(58°F)		23°C
(74°F)		25°C
(77°F)		27°C
(81°F)		25°C
(77°F)		19°C
(67°F)		14°C
(58°F)		9°C
(48°F)		4°C
(39°F)
Average high-2°C
(28°F)		-3°C
(27°F)		1°C
(35°F)		7°C
(44°F)		13°C
(56°F)		19°C
(67°F)		21°C
(70°F)		19°C
(67°F)		14°C
(57°F)		8°C
(46°F)		3°C
(38°F)		-1°C
(30°F)
Daily mean-5°C
(24°F)		-5°C
(23°F)		-2°C
(29°F)		3°C
(37°F)		9°C
(48°F)		15°C
(60°F)		17°C
(63°F)		16°C
(61°F)		11°C
(52°F)		6°C
(43°F)		2°C
(36°F)		-2°C
(28°F)
Average low-7°C
(20°F)		-8°C
(18°F)		-6°C
(22°F)		-1°C
(30°F)		4°C
(39°F)		11°C
(52°F)		13°C
(56°F)		12°C
(54°F)		8°C
(47°F)		4°C
(40°F)		0°C
(33°F)		-4°C
(25°F)
Mean minimum-21°C
(-5°F)		-19°C
(-3°F)		-18°C
(1°F)		-8°C
(17°F)		-2°C
(29°F)		6°C
(42°F)		9°C
(48°F)		7°C
(46°F)		2°C
(36°F)		-3°C
(27°F)		-7°C
(20°F)		-11°C
(12°F)
Minimum-26°C
(-15°F)		-29°C
(-20°F)		-25°C
(-13°F)		-13°C
(8°F)		-4°C
(26°F)		2°C
(36°F)		8°C
(46°F)		7°C
(44°F)		0°C
(33°F)		-6°C
(22°F)		-10°C
(15°F)		-21°C
(-5°F)

Compare climate in Hartola with other places

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

Monthly average precipitation in Hartola, Finland

Hartola usually has the most precipitation in July, August and October, with an average of 14 rainy days and 82 mm (3.2 inches) of precipitation per month. The driest months in Hartola are February, March and April. On average, 44 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Hartola. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)46 (1.8)43 (1.7)43 (1.7)45 (1.8)57 (2.3)64 (2.5)78 (3.1)89 (3.5)67 (2.6)78 (3.1)55 (2.2)68 (2.7)
Average precipitation days (≥ 1 mm)12101111911121512161115

Monthly sunshine hours in Hartola, Finland

The sunniest months in Hartola are May, June and July, when the sun shines an average of 14 hours 52 minutes a day. Least sunny months in Hartola: January, November and December receive an average of 1 hours 41 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Hartola. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours421322373494244734713822501537735
Mean daily daylight hours6h 22m8h 56m11h 50m14h 48m17h 37m19h 20m18h 24m15h 45m12h 50m9h 55m7h 8m5h 27m

Solar UV radiation in Hartola, Finland

Hartola 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 Hartola UV Index data.

Average daily maximum UV levels by month for Hartola. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)113456753211