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Monthly climate in Ilmajoki, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Ilmajoki 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 -28 °C (-17 °F) or can rise to as high as 31 °C (88 °F). The average annual precipitation amounts to about 671 mm (26.4 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually. Ilmajoki enjoys an average of 3262 hours of sunshine throughout the year, and daylight varies from 5 hours 0 minutes to 19 hours 54 minutes per day.

Monthly average temperatures in Ilmajoki, Finland

The warmest months in Ilmajoki 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 - 28 °F) throughout the day. On average each year, Ilmajoki experiences 12 days above 25 °C (77.0 °F) and 150 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Ilmajoki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to June 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Maximum8°C
(46°F)		7°C
(44°F)		12°C
(54°F)		21°C
(71°F)		27°C
(82°F)		31°C
(88°F)		31°C
(88°F)		30°C
(86°F)		24°C
(75°F)		19°C
(67°F)		11°C
(53°F)		5°C
(42°F)
Mean maximum4°C
(40°F)		5°C
(41°F)		9°C
(49°F)		17°C
(62°F)		24°C
(75°F)		26°C
(80°F)		28°C
(82°F)		26°C
(79°F)		21°C
(69°F)		15°C
(59°F)		9°C
(49°F)		4°C
(39°F)
Average high-2°C
(29°F)		-2°C
(28°F)		2°C
(36°F)		8°C
(46°F)		14°C
(57°F)		20°C
(68°F)		21°C
(71°F)		19°C
(67°F)		14°C
(57°F)		8°C
(46°F)		3°C
(38°F)		-1°C
(31°F)
Daily mean-4°C
(25°F)		-5°C
(23°F)		-2°C
(29°F)		3°C
(38°F)		9°C
(49°F)		15°C
(60°F)		17°C
(63°F)		15°C
(59°F)		10°C
(50°F)		5°C
(41°F)		1°C
(34°F)		-2°C
(28°F)
Average low-7°C
(20°F)		-9°C
(17°F)		-6°C
(22°F)		-1°C
(30°F)		3°C
(38°F)		9°C
(49°F)		11°C
(53°F)		10°C
(51°F)		6°C
(44°F)		2°C
(36°F)		-1°C
(30°F)		-4°C
(25°F)
Mean minimum-20°C
(-4°F)		-21°C
(-6°F)		-18°C
(-0°F)		-9°C
(16°F)		-3°C
(26°F)		4°C
(39°F)		6°C
(43°F)		4°C
(39°F)		-1°C
(31°F)		-8°C
(17°F)		-10°C
(13°F)		-13°C
(8°F)
Minimum-28°C
(-17°F)		-27°C
(-16°F)		-27°C
(-16°F)		-16°C
(4°F)		-5°C
(23°F)		-1°C
(31°F)		4°C
(39°F)		3°C
(37°F)		-3°C
(27°F)		-13°C
(8°F)		-18°C
(0°F)		-26°C
(-14°F)

Compare climate in Ilmajoki with other places

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

Monthly average precipitation in Ilmajoki, Finland

Ilmajoki usually has the most precipitation in August, September and October, with an average of 13 rainy days and 79 mm (3.1 inches) of precipitation per month. The driest months in Ilmajoki are January, February and March. On average, 39 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Ilmajoki. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)36 (1.4)38 (1.5)41 (1.6)42 (1.7)56 (2.2)61 (2.4)57 (2.2)90 (3.5)73 (2.9)73 (2.9)57 (2.2)47 (1.8)
Average precipitation days (≥ 1 mm)1081110910101413141013

Monthly sunshine hours in Ilmajoki, Finland

The sunniest months in Ilmajoki are May, June and July, when the sun shines an average of 15 hours 38 minutes a day. Least sunny months in Ilmajoki: 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 Ilmajoki. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours451462643574535024824102801799443
Mean daily daylight hours6h 0m8h 46m11h 50m14h 57m17h 59m19h 54m18h 50m15h 57m12h 53m9h 48m6h 50m5h 0m

Solar UV radiation in Ilmajoki, Finland

Ilmajoki 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 Ilmajoki UV Index data.

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