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Monthly climate in Nagu, Finland

Last updated: July 31, 2025

Under the Köppen–Geiger climate classification Nagu features a humid continental climate (Dfb). Temperatures typically range between -2 °C (28 °F) and 18 °C (64 °F) through the year, but rarely can drop to -17 °C (2 °F) or can rise to as high as 28 °C (82 °F). The average annual precipitation amounts to about 733 mm (28.8 inches) and receives 136 rainy days on the 1 mm (0.04 inches) threshold annually. Nagu enjoys an average of 3460 hours of sunshine throughout the year, and daylight varies from 5 hours 56 minutes to 18 hours 46 minutes per day.

Monthly average temperatures in Nagu, Finland

The warmest months in Nagu are June, July and August, with daily mean temperatures ranging from 15 to 18 °C (59 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -2 to 0 °C (28 - 32 °F) throughout the day. On average each year, Nagu experiences 3 days above 25 °C (77.0 °F) and 76 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Nagu. 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)		8°C
(47°F)		18°C
(64°F)		21°C
(70°F)		25°C
(78°F)		28°C
(82°F)		25°C
(78°F)		21°C
(70°F)		15°C
(60°F)		13°C
(55°F)		7°C
(45°F)
Mean maximum5°C
(41°F)		4°C
(39°F)		6°C
(42°F)		11°C
(52°F)		17°C
(63°F)		20°C
(68°F)		25°C
(77°F)		22°C
(72°F)		19°C
(67°F)		14°C
(57°F)		10°C
(51°F)		6°C
(44°F)
Average high1°C
(34°F)		-0°C
(31°F)		2°C
(35°F)		5°C
(42°F)		10°C
(51°F)		17°C
(62°F)		20°C
(68°F)		19°C
(66°F)		15°C
(59°F)		10°C
(50°F)		6°C
(44°F)		3°C
(37°F)
Daily mean-0°C
(31°F)		-2°C
(28°F)		-0°C
(32°F)		3°C
(39°F)		9°C
(48°F)		15°C
(59°F)		18°C
(64°F)		17°C
(63°F)		13°C
(56°F)		9°C
(48°F)		5°C
(42°F)		1°C
(35°F)
Average low-2°C
(29°F)		-4°C
(25°F)		-2°C
(29°F)		2°C
(35°F)		7°C
(44°F)		13°C
(55°F)		16°C
(61°F)		16°C
(60°F)		12°C
(54°F)		7°C
(45°F)		4°C
(39°F)		0°C
(33°F)
Mean minimum-11°C
(13°F)		-12°C
(10°F)		-10°C
(15°F)		-3°C
(26°F)		1°C
(33°F)		9°C
(48°F)		12°C
(53°F)		11°C
(52°F)		6°C
(44°F)		0°C
(33°F)		-2°C
(28°F)		-5°C
(22°F)
Minimum-16°C
(3°F)		-16°C
(3°F)		-17°C
(2°F)		-7°C
(20°F)		-0°C
(32°F)		5°C
(42°F)		11°C
(52°F)		9°C
(49°F)		4°C
(40°F)		-1°C
(31°F)		-6°C
(22°F)		-14°C
(7°F)

Compare climate in Nagu with other places

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

Monthly average precipitation in Nagu, Finland

Nagu usually has the most precipitation in August, October and December, with an average of 16 rainy days and 92 mm (3.6 inches) of precipitation per month. The driest months in Nagu are April, May and June. On average, 35 mm (1.4 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Nagu. Generated using Copernicus Climate Change Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Average precipitation mm (inches)51 (2.0)43 (1.7)45 (1.8)29 (1.1)39 (1.5)37 (1.4)60 (2.4)85 (3.3)78 (3.1)104 (4.1)74 (2.9)88 (3.5)
Average precipitation days (≥ 1 mm)1189866101313191617

Monthly sunshine hours in Nagu, Finland

The sunniest months in Nagu are May, June and July, when the sun shines an average of 15 hours 40 minutes a day. Least sunny months in Nagu: January, November and December receive an average of 2 hours 49 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Nagu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2017 to January 2022.
 JanFebMarAprMayJunJulAugSepOctNovDec
Mean monthly sunshine hours6215827737345849448942331421112769
Mean daily daylight hours6h 45m9h 7m11h 51m14h 39m17h 14m18h 46m17h 56m15h 31m12h 48m10h 2m7h 27m5h 56m

Solar UV radiation in Nagu, Finland

Nagu 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 Nagu UV Index data.

Average daily maximum UV levels by month for Nagu. Generated using Copernicus Atmosphere Monitoring Service information. Data for period from January 2022 to January 2023.
 JanFebMarAprMayJunJulAugSepOctNovDec
UV Index (month maximum)113457754211