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Monthly climate in Sahalahti, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Sahalahti 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 -25 °C (-12 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 734 mm (28.9 inches) and receives 143 rainy days on the 1 mm (0.04 inches) threshold annually. Sahalahti enjoys an average of 3087 hours of sunshine throughout the year, and daylight varies from 5 hours 30 minutes to 19 hours 17 minutes per day.

Monthly average temperatures in Sahalahti, Finland

The warmest months in Sahalahti are June, July and August, with daily mean temperatures ranging from 15 to 17 °C (59 - 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 - 29 °F) throughout the day. On average each year, Sahalahti experiences 10 days above 25 °C (77.0 °F) and 133 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Sahalahti. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(45°F)		6°C
(43°F)		10°C
(51°F)		20°C
(68°F)		27°C
(81°F)		29°C
(85°F)		31°C
(88°F)		29°C
(85°F)		22°C
(72°F)		18°C
(64°F)		12°C
(53°F)		5°C
(41°F)
Mean maximum3°C
(38°F)		4°C
(39°F)		8°C
(47°F)		15°C
(58°F)		23°C
(73°F)		25°C
(77°F)		27°C
(81°F)		25°C
(77°F)		20°C
(68°F)		14°C
(58°F)		9°C
(49°F)		4°C
(39°F)
Average high-2°C
(29°F)		-2°C
(28°F)		1°C
(35°F)		7°C
(44°F)		13°C
(56°F)		19°C
(67°F)		21°C
(69°F)		19°C
(67°F)		14°C
(57°F)		8°C
(47°F)		4°C
(39°F)		-0°C
(31°F)
Daily mean-4°C
(25°F)		-5°C
(23°F)		-2°C
(29°F)		3°C
(37°F)		9°C
(48°F)		15°C
(59°F)		17°C
(63°F)		16°C
(60°F)		11°C
(52°F)		6°C
(43°F)		2°C
(36°F)		-2°C
(29°F)
Average low-6°C
(21°F)		-8°C
(19°F)		-5°C
(23°F)		-1°C
(30°F)		4°C
(39°F)		10°C
(51°F)		13°C
(56°F)		12°C
(54°F)		8°C
(47°F)		4°C
(40°F)		1°C
(33°F)		-3°C
(26°F)
Mean minimum-19°C
(-2°F)		-18°C
(-1°F)		-16°C
(3°F)		-8°C
(18°F)		-2°C
(29°F)		5°C
(42°F)		8°C
(47°F)		7°C
(45°F)		2°C
(36°F)		-2°C
(28°F)		-6°C
(21°F)		-10°C
(14°F)
Minimum-25°C
(-12°F)		-24°C
(-10°F)		-24°C
(-11°F)		-11°C
(12°F)		-3°C
(27°F)		2°C
(35°F)		6°C
(44°F)		7°C
(45°F)		-0°C
(32°F)		-5°C
(24°F)		-9°C
(17°F)		-19°C
(-1°F)

Compare climate in Sahalahti with other places

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

Monthly average precipitation in Sahalahti, Finland

Sahalahti usually has the most precipitation in July, August and October, with an average of 13 rainy days and 81 mm (3.2 inches) of precipitation per month. The driest months in Sahalahti are February, March and April. On average, 42 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Sahalahti. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)47 (1.9)40 (1.6)42 (1.7)42 (1.7)58 (2.3)68 (2.7)76 (3.0)85 (3.3)69 (2.7)82 (3.2)58 (2.3)66 (2.6)
Average precipitation days (≥ 1 mm)12911101011111414161213

Monthly sunshine hours in Sahalahti, Finland

The sunniest months in Sahalahti are May, June and July, when the sun shines an average of 14 hours 56 minutes a day. Least sunny months in Sahalahti: January, November and December receive an average of 1 hours 46 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Sahalahti. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours421382513474314784643902621568139
Mean daily daylight hours6h 24m8h 57m11h 50m14h 47m17h 35m19h 17m18h 21m15h 44m12h 50m9h 56m7h 9m5h 30m

Solar UV radiation in Sahalahti, Finland

Sahalahti 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 Sahalahti UV Index data.

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