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Monthly climate in Alastaro, Southwest Finland, Finland

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Alastaro features a subarctic climate (Dfc).Temperatures typically range between -4 °C (25 °F) and 17 °C (64 °F) through the year, but rarely can drop to -27 °C (-16 °F) or can rise to as high as 32 °C (89 °F).The average annual precipitation amounts to about 694 mm (27.3 inches) and receives 131 rainy days on the 1 mm (0.04 inches) threshold annually.Alastaro enjoys an average of 3262 hours of sunshine throughout the year, and daylight varies from 5 hours 39 minutes to 19 hours 5 minutes per day.

Monthly average temperatures in Alastaro, Southwest Finland, Finland §

The warmest months in Alastaro are June, July and August, with daily mean temperatures ranging from 16 to 17 °C (61 - 64 °F) throughout the day. The coldest temperatures usually occur in January, February and December, when daily mean temperatures range from -4 to -1 °C (25 - 30 °F) throughout the day. On average each year, Alastaro experiences 14 days above 25 °C (77.0 °F) and 133 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Alastaro, 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
(46°F)		 7°C
(45°F)		 12°C
(55°F)		 21°C
(70°F)		 28°C
(82°F)		 31°C
(89°F)		 32°C
(89°F)		 30°C
(86°F)		 24°C
(76°F)		 18°C
(65°F)		 13°C
(56°F)		 6°C
(43°F)
Mean maximum 4°C
(40°F)		 5°C
(41°F)		 10°C
(51°F)		 17°C
(62°F)		 24°C
(76°F)		 26°C
(79°F)		 28°C
(83°F)		 26°C
(79°F)		 21°C
(71°F)		 15°C
(59°F)		 10°C
(51°F)		 5°C
(42°F)
Average high -1°C
(31°F)		 -1°C
(30°F)		 3°C
(38°F)		 9°C
(48°F)		 15°C
(59°F)		 21°C
(70°F)		 22°C
(71°F)		 20°C
(68°F)		 15°C
(59°F)		 9°C
(48°F)		 4°C
(40°F)		 0°C
(33°F)
Daily mean -3°C
(27°F)		 -4°C
(25°F)		 -1°C
(31°F)		 4°C
(39°F)		 10°C
(50°F)		 16°C
(61°F)		 17°C
(64°F)		 16°C
(61°F)		 11°C
(53°F)		 6°C
(44°F)		 3°C
(37°F)		 -1°C
(30°F)
Average low -5°C
(23°F)		 -7°C
(19°F)		 -5°C
(24°F)		 -1°C
(31°F)		 4°C
(40°F)		 11°C
(51°F)		 12°C
(55°F)		 12°C
(53°F)		 8°C
(46°F)		 4°C
(39°F)		 1°C
(33°F)		 -3°C
(27°F)
Mean minimum -17°C
(1°F)		 -19°C
(-2°F)		 -16°C
(4°F)		 -8°C
(18°F)		 -3°C
(27°F)		 5°C
(41°F)		 7°C
(45°F)		 6°C
(42°F)		 1°C
(34°F)		 -5°C
(24°F)		 -7°C
(20°F)		 -10°C
(14°F)
Minimum -25°C
(-12°F)		 -25°C
(-12°F)		 -27°C
(-16°F)		 -13°C
(10°F)		 -4°C
(25°F)		 2°C
(36°F)		 5°C
(41°F)		 5°C
(41°F)		 -2°C
(29°F)		 -7°C
(19°F)		 -10°C
(15°F)		 -20°C
(-4°F)

Compare climate in Alastaro with other places

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

Monthly average precipitation in Alastaro, Southwest Finland, Finland §

Alastaro usually has the most precipitation in July, August and October, with an average of 13 rainy days and 80 mm (3.2 inches) of precipitation per month.The driest months in Alastaro 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 Alastaro, 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) 46 (1.8) 42 (1.6) 43 (1.7) 38 (1.5) 50 (2.0) 57 (2.2) 83 (3.3) 83 (3.3) 59 (2.3) 75 (3.0) 54 (2.1) 64 (2.5)
Average precipitation days (≥ 1 mm) 9 8 10 10 10 10 11 13 12 15 10 13

Monthly sunshine hours in Alastaro, Southwest Finland, Finland §

The sunniest months in Alastaro are May, June and July, when the sun shines an average of 15 hours 22 minutes a day.Least sunny months in Alastaro: January, November and December receive an average of 2 hours 15 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Alastaro, 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 48 153 261 348 446 490 477 410 285 179 102 57
Mean daily daylight hours 6h 32m 9h 1m 11h 51m 14h 44m 17h 27m 19h 5m 18h 12m 15h 39m 12h 49m 9h 58m 7h 16m 5h 39m

Solar UV radiation in Alastaro, Southwest Finland, Finland §

Alastaro 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 Alastaro UV Index data.

Average daily maximum UV levels by month for Alastaro, 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 6 6 5 3 2 1 1