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Monthly climate in Porvoo, Uusimaa, Finland

Last updated: May 6, 2024

Under the Köppen–Geiger climate classification Porvoo features a humid continental climate (Dfb).Temperatures typically range between -4 °C (25 °F) and 18 °C (65 °F) through the year, but rarely can drop to -25 °C (-13 °F) or can rise to as high as 32 °C (89 °F).The average annual precipitation amounts to about 725 mm (28.6 inches) and receives 144 rainy days on the 1 mm (0.04 inches) threshold annually.Porvoo enjoys an average of 3302 hours of sunshine throughout the year, and daylight varies from 5 hours 52 minutes to 18 hours 50 minutes per day.

Monthly average temperatures in Porvoo, Uusimaa, Finland §

The warmest months in Porvoo are June, July and August, with daily mean temperatures ranging from 16 to 18 °C (62 - 65 °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, Porvoo experiences 15 days above 25 °C (77.0 °F) and 125 days below 0 °C (32.0 °F).

Monthly average temperatures with daily means, minimums and maximums for period, average high and low temperatures in Porvoo, Uusimaa, 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)		 8°C
(46°F)		 13°C
(55°F)		 21°C
(70°F)		 29°C
(84°F)		 32°C
(89°F)		 32°C
(89°F)		 31°C
(87°F)		 24°C
(75°F)		 17°C
(64°F)		 12°C
(54°F)		 7°C
(44°F)
Mean maximum 4°C
(40°F)		 5°C
(41°F)		 10°C
(50°F)		 16°C
(62°F)		 25°C
(77°F)		 26°C
(79°F)		 29°C
(84°F)		 27°C
(80°F)		 21°C
(70°F)		 15°C
(59°F)		 10°C
(51°F)		 5°C
(41°F)
Average high -1°C
(31°F)		 -1°C
(30°F)		 3°C
(37°F)		 9°C
(48°F)		 15°C
(59°F)		 21°C
(70°F)		 22°C
(72°F)		 20°C
(69°F)		 15°C
(59°F)		 9°C
(49°F)		 4°C
(40°F)		 0°C
(33°F)
Daily mean -3°C
(27°F)		 -4°C
(25°F)		 -1°C
(30°F)		 4°C
(40°F)		 11°C
(51°F)		 17°C
(62°F)		 18°C
(65°F)		 16°C
(62°F)		 12°C
(53°F)		 7°C
(44°F)		 3°C
(37°F)		 -1°C
(30°F)
Average low -6°C
(22°F)		 -7°C
(20°F)		 -5°C
(24°F)		 -0°C
(32°F)		 5°C
(41°F)		 11°C
(53°F)		 13°C
(56°F)		 12°C
(54°F)		 8°C
(47°F)		 4°C
(40°F)		 1°C
(34°F)		 -3°C
(27°F)
Mean minimum -19°C
(-3°F)		 -17°C
(2°F)		 -16°C
(4°F)		 -8°C
(19°F)		 -2°C
(28°F)		 5°C
(42°F)		 8°C
(47°F)		 7°C
(45°F)		 1°C
(35°F)		 -3°C
(26°F)		 -7°C
(20°F)		 -10°C
(14°F)
Minimum -25°C
(-13°F)		 -25°C
(-13°F)		 -23°C
(-10°F)		 -14°C
(7°F)		 -4°C
(26°F)		 2°C
(35°F)		 7°C
(44°F)		 6°C
(43°F)		 -2°C
(29°F)		 -5°C
(23°F)		 -8°C
(18°F)		 -20°C
(-3°F)

Compare climate in Porvoo with other places

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

Monthly average precipitation in Porvoo, Uusimaa, Finland §

Porvoo usually has the most precipitation in August, October and December, with an average of 14 rainy days and 77 mm (3.0 inches) of precipitation per month.The driest months in Porvoo are February, March and April. On average, 48 mm (1.9 inches) of precipitation falls during these months.

Monthly average precipitation and precipitation days in Porvoo, Uusimaa, 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) 54 (2.1) 48 (1.9) 49 (1.9) 48 (1.9) 50 (2.0) 56 (2.2) 71 (2.8) 78 (3.1) 63 (2.5) 80 (3.2) 56 (2.2) 73 (2.9)
Average precipitation days (≥ 1 mm) 11 10 12 11 10 11 12 12 12 15 12 16

Monthly sunshine hours in Porvoo, Uusimaa, Finland §

The sunniest months in Porvoo are May, June and July, when the sun shines an average of 15 hours 30 minutes a day.Least sunny months in Porvoo: January, November and December receive an average of 2 hours 18 minutes of sunshine daily.

Mean monthly sunshine duration, average sunshine hours per day and mean daily daylight hours in Porvoo, Uusimaa, 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 51 151 261 361 450 490 484 407 288 192 107 53
Mean daily daylight hours 6h 42m 9h 5m 11h 51m 14h 40m 17h 17m 18h 50m 18h 0m 15h 33m 12h 48m 10h 1m 7h 24m 5h 52m

Solar UV radiation in Porvoo, Uusimaa, Finland §

Porvoo 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 Porvoo UV Index data.

Average daily maximum UV levels by month for Porvoo, Uusimaa, 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