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Monthly climate in Viiala, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Viiala features a subarctic climate (Dfc). Temperatures typically range between -5 °C (24 °F) and 17 °C (63 °F) through the year, but rarely can drop to -26 °C (-15 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 709 mm (27.9 inches) and receives 136 rainy days on the 1 mm (0.04 inches) threshold annually. Viiala enjoys an average of 3149 hours of sunshine throughout the year, and daylight varies from 5 hours 35 minutes to 19 hours 10 minutes per day.

Monthly average temperatures in Viiala, Finland

The warmest months in Viiala are June, July and August, with daily mean temperatures ranging from 16 to 17 °C (61 - 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 (24 - 29 °F) throughout the day. On average each year, Viiala experiences 11 days above 25 °C (77.0 °F) and 132 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Viiala. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum7°C
(46°F)		7°C
(44°F)		11°C
(52°F)		19°C
(67°F)		27°C
(81°F)		31°C
(88°F)		30°C
(86°F)		29°C
(85°F)		23°C
(73°F)		18°C
(64°F)		12°C
(55°F)		5°C
(42°F)
Mean maximum4°C
(39°F)		4°C
(40°F)		10°C
(49°F)		15°C
(59°F)		23°C
(74°F)		25°C
(78°F)		27°C
(81°F)		25°C
(78°F)		20°C
(69°F)		15°C
(59°F)		10°C
(50°F)		4°C
(40°F)
Average high-2°C
(30°F)		-2°C
(29°F)		2°C
(36°F)		7°C
(45°F)		14°C
(57°F)		20°C
(68°F)		21°C
(70°F)		19°C
(67°F)		14°C
(58°F)		8°C
(47°F)		4°C
(39°F)		-0°C
(32°F)
Daily mean-4°C
(26°F)		-5°C
(24°F)		-1°C
(30°F)		3°C
(38°F)		10°C
(50°F)		16°C
(61°F)		17°C
(63°F)		16°C
(61°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
(31°F)		5°C
(41°F)		11°C
(53°F)		13°C
(56°F)		12°C
(54°F)		8°C
(47°F)		4°C
(39°F)		0°C
(33°F)		-3°C
(26°F)
Mean minimum-20°C
(-3°F)		-19°C
(-2°F)		-17°C
(2°F)		-8°C
(18°F)		-2°C
(29°F)		6°C
(43°F)		8°C
(47°F)		7°C
(45°F)		2°C
(35°F)		-3°C
(27°F)		-7°C
(20°F)		-10°C
(14°F)
Minimum-26°C
(-15°F)		-26°C
(-15°F)		-25°C
(-12°F)		-13°C
(9°F)		-3°C
(28°F)		3°C
(38°F)		7°C
(44°F)		7°C
(44°F)		-1°C
(30°F)		-5°C
(23°F)		-10°C
(14°F)		-18°C
(-1°F)

Compare climate in Viiala with other places

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

Monthly average precipitation in Viiala, Finland

Viiala usually has the most precipitation in July, August and October, with an average of 13 rainy days and 79 mm (3.1 inches) of precipitation per month. The driest months in Viiala are February, March and April. On average, 41 mm (1.6 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Viiala. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)46 (1.8)39 (1.6)41 (1.6)42 (1.7)56 (2.2)70 (2.8)77 (3.0)83 (3.3)61 (2.4)76 (3.0)54 (2.1)62 (2.4)
Average precipitation days (≥ 1 mm)12910101011111312151013

Monthly sunshine hours in Viiala, Finland

The sunniest months in Viiala are May, June and July, when the sun shines an average of 15 hours 3 minutes a day. Least sunny months in Viiala: January, November and December receive an average of 2 hours 0 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Viiala. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours441432553444354814673962741659346
Mean daily daylight hours6h 28m8h 59m11h 51m14h 46m17h 31m19h 10m18h 16m15h 41m12h 50m9h 57m7h 13m5h 35m

Solar UV radiation in Viiala, Finland

Viiala 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 Viiala UV Index data.

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