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Monthly climate in Siikainen, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Siikainen features a humid continental climate (Dfb). Temperatures typically range between -4 °C (24 °F) and 18 °C (64 °F) through the year, but rarely can drop to -28 °C (-18 °F) or can rise to as high as 33 °C (92 °F). The average annual precipitation amounts to about 764 mm (30.1 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually. Siikainen enjoys an average of 3366 hours of sunshine throughout the year, and daylight varies from 5 hours 21 minutes to 19 hours 28 minutes per day.

Monthly average temperatures in Siikainen, Finland

The warmest months in Siikainen are June, July and August, with daily mean temperatures ranging from 15 to 18 °C (60 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -2 °C (24 - 29 °F) throughout the day. On average each year, Siikainen experiences 14 days above 25 °C (77.0 °F) and 139 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Siikainen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(47°F)		7°C
(45°F)		11°C
(53°F)		22°C
(72°F)		28°C
(82°F)		31°C
(88°F)		33°C
(92°F)		29°C
(85°F)		24°C
(76°F)		17°C
(63°F)		12°C
(54°F)		6°C
(43°F)
Mean maximum5°C
(41°F)		5°C
(41°F)		8°C
(48°F)		16°C
(61°F)		24°C
(76°F)		27°C
(81°F)		29°C
(85°F)		25°C
(78°F)		21°C
(70°F)		15°C
(59°F)		9°C
(49°F)		5°C
(41°F)
Average high-1°C
(30°F)		-2°C
(29°F)		2°C
(36°F)		8°C
(46°F)		14°C
(57°F)		20°C
(69°F)		22°C
(72°F)		20°C
(68°F)		15°C
(58°F)		8°C
(47°F)		4°C
(39°F)		0°C
(32°F)
Daily mean-3°C
(26°F)		-4°C
(24°F)		-1°C
(30°F)		3°C
(38°F)		9°C
(49°F)		16°C
(61°F)		18°C
(64°F)		15°C
(60°F)		11°C
(52°F)		6°C
(43°F)		2°C
(36°F)		-2°C
(29°F)
Average low-6°C
(22°F)		-7°C
(19°F)		-5°C
(23°F)		-1°C
(30°F)		4°C
(39°F)		10°C
(50°F)		12°C
(54°F)		11°C
(52°F)		7°C
(46°F)		3°C
(38°F)		0°C
(33°F)		-3°C
(26°F)
Mean minimum-18°C
(-1°F)		-18°C
(-0°F)		-16°C
(3°F)		-9°C
(16°F)		-3°C
(27°F)		5°C
(42°F)		7°C
(44°F)		4°C
(39°F)		0°C
(33°F)		-6°C
(22°F)		-8°C
(18°F)		-11°C
(12°F)
Minimum-25°C
(-12°F)		-23°C
(-10°F)		-28°C
(-18°F)		-17°C
(2°F)		-5°C
(23°F)		0°C
(33°F)		6°C
(42°F)		2°C
(37°F)		-2°C
(29°F)		-10°C
(15°F)		-13°C
(9°F)		-23°C
(-9°F)

Compare climate in Siikainen with other places

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

Monthly average precipitation in Siikainen, Finland

Siikainen usually has the most precipitation in July, August and October, with an average of 13 rainy days and 90 mm (3.6 inches) of precipitation per month. The driest months in Siikainen are January, April and May. On average, 43 mm (1.7 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Siikainen. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)42 (1.7)46 (1.8)47 (1.8)43 (1.7)42 (1.7)62 (2.5)83 (3.3)106 (4.2)76 (3.0)81 (3.2)65 (2.6)68 (2.7)
Average precipitation days (≥ 1 mm)117109810111512151014

Monthly sunshine hours in Siikainen, Finland

The sunniest months in Siikainen are May, June and July, when the sun shines an average of 15 hours 48 minutes a day. Least sunny months in Siikainen: January, November and December receive an average of 2 hours 17 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Siikainen. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours5315726635845950249242529719410552
Mean daily daylight hours6h 16m8h 54m11h 50m14h 50m17h 42m19h 28m18h 30m15h 48m12h 51m9h 53m7h 3m5h 21m

Solar UV radiation in Siikainen, Finland

Siikainen 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 Siikainen UV Index data.

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