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Monthly climate in Naantali, Southwest Finland, Finland

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Naantali features a humid continental climate (Dfb).Temperatures typically range between -3 °C (27 °F) and 18 °C (64 °F) through the year, but rarely can drop to -23 °C (-9 °F) or can rise to as high as 31 °C (89 °F).The average annual precipitation amounts to about 712 mm (28.0 inches) and receives 132 rainy days on the 1 mm (0.04 inches) threshold annually.Naantali enjoys an average of 3460 hours of sunshine throughout the year, and daylight varies from 5 hours 49 minutes to 18 hours 54 minutes per day.

Monthly average temperatures in Naantali, Southwest Finland, Finland §

The warmest months in Naantali are June, July and August, with daily mean temperatures ranging from 16 to 18 °C (61 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and March, when daily mean temperatures range from -3 to 0 °C (27 - 32 °F) throughout the day. On average each year, Naantali experiences 8 days above 25 °C (77.0 °F) and 108 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Naantali, Southwest Finland, Finland.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to June 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum 8°C
(47°F)		 7°C
(44°F)		 11°C
(52°F)		 21°C
(70°F)		 26°C
(79°F)		 28°C
(83°F)		 31°C
(89°F)		 28°C
(83°F)		 23°C
(73°F)		 17°C
(62°F)		 13°C
(56°F)		 7°C
(45°F)
Mean maximum 5°C
(41°F)		 5°C
(41°F)		 9°C
(49°F)		 15°C
(59°F)		 22°C
(72°F)		 24°C
(75°F)		 28°C
(83°F)		 24°C
(76°F)		 21°C
(69°F)		 15°C
(59°F)		 11°C
(51°F)		 6°C
(44°F)
Average high 0°C
(33°F)		 -1°C
(31°F)		 3°C
(37°F)		 8°C
(46°F)		 13°C
(56°F)		 20°C
(67°F)		 21°C
(71°F)		 20°C
(68°F)		 15°C
(60°F)		 10°C
(49°F)		 6°C
(42°F)		 2°C
(35°F)
Daily mean -2°C
(29°F)		 -3°C
(27°F)		 -0°C
(32°F)		 4°C
(39°F)		 10°C
(49°F)		 16°C
(61°F)		 18°C
(64°F)		 17°C
(62°F)		 12°C
(54°F)		 7°C
(46°F)		 4°C
(39°F)		 0°C
(32°F)
Average low -4°C
(25°F)		 -6°C
(22°F)		 -4°C
(26°F)		 0°C
(33°F)		 5°C
(41°F)		 11°C
(52°F)		 13°C
(56°F)		 13°C
(56°F)		 9°C
(49°F)		 5°C
(42°F)		 2°C
(36°F)		 -1°C
(30°F)
Mean minimum -15°C
(5°F)		 -16°C
(4°F)		 -13°C
(9°F)		 -6°C
(21°F)		 -2°C
(28°F)		 6°C
(44°F)		 8°C
(47°F)		 7°C
(45°F)		 2°C
(36°F)		 -3°C
(27°F)		 -5°C
(24°F)		 -9°C
(17°F)
Minimum -21°C
(-6°F)		 -20°C
(-4°F)		 -23°C
(-9°F)		 -9°C
(16°F)		 -4°C
(26°F)		 3°C
(38°F)		 6°C
(44°F)		 6°C
(43°F)		 -1°C
(31°F)		 -5°C
(23°F)		 -8°C
(17°F)		 -18°C
(-1°F)

Compare climate in Naantali with other places

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

Monthly average precipitation in Naantali, Southwest Finland, Finland §

Naantali usually has the most precipitation in August, October and December, with an average of 15 rainy days and 84 mm (3.3 inches) of precipitation per month.The driest months in Naantali are February, April and June. On average, 39 mm (1.5 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Naantali, Southwest Finland, Finland.Generated using Copernicus Climate Change Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Average precipitation mm (inches) 48 (1.9) 42 (1.7) 44 (1.7) 32 (1.3) 44 (1.7) 43 (1.7) 75 (3.0) 87 (3.4) 72 (2.8) 86 (3.4) 59 (2.3) 79 (3.1)
Average precipitation days (≥ 1 mm) 9 8 9 9 9 7 11 14 12 17 12 15

Monthly sunshine hours in Naantali, Southwest Finland, Finland §

The sunniest months in Naantali are May, June and July, when the sun shines an average of 15 hours 40 minutes a day.Least sunny months in Naantali: 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 Naantali, Southwest Finland, Finland.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2017 to January 2022.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Mean monthly sunshine hours 62 158 277 373 458 494 489 423 314 211 127 69
Mean daily daylight hours 6h 39m 9h 4m 11h 51m 14h 41m 17h 20m 18h 54m 18h 3m 15h 35m 12h 48m 10h 0m 7h 22m 5h 49m

Solar UV radiation in Naantali, Southwest Finland, Finland §

Naantali 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 Naantali UV Index data.

Average daily maximum UV levels by month for Naantali, Southwest Finland, Finland.Generated using Copernicus Atmosphere Monitoring Service information.Data for period from January 2022 to January 2023.
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
UV Index (month maximum) 1 1 3 4 5 7 7 5 4 2 1 1