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The climate in Finland

Average daytime and nighttime temperatures


All climate diagrams on this page result from the collected data of 36 weather stations.
All data correspond to the average monthly values of the last 20 years.


Back to overview: Finland

Climate zone: The northern part of Finland is located in the cold polar zone of the Arctic. The southern areas in the temperate climatic zone.

It won't be really warm here and given to the water temperatures of 17 degrees maximum you will leave your bathing togs at home. The warmest and at the same time rainiest province is Mikkeli. The coldest is Lapland. Due to the warmer temperatures the best time for traveling is from May to September. Less attractive are the cold months from October to March.
Duration of daylight and sunshine in Finland
Compare climate with other regions or countries
Hours of sunshine per daySunshine hours per day in Finland
Rainy days per monthRainy days per month in Finland
Precipitation in mm/dayPrecipitation in Finland
Water temperatureWater temperatures in Finland
Relative humidity in %Relative humidity in Finland
Absolute humidity in g/m³Absolute humidity in Finland

Provinces in Finland

All figures per year. For detailed climate data click on the name of the region.

provinceTemperature
max Ø day
Temperature
min Ø night
Sunshine
hours
Rainy
days
PrecipitationHumidity
Kymi8.5 °C0.6 °C1,606 h115 624 l80.0 %
Lapland4.8 °C-4.1 °C1,424 h106 518 l82.0 %
Mikkeli9.7 °C2.1 °C1,752 h115 664 l
Central Finland8.2 °C0.5 °C1,716 h113 624 l81.0 %
North Karelia7.7 °C-0.1 °C1,752 h121 657 l
Uusimaa9.6 °C2.6 °C1,789 h112 613 l80.0 %
Vaasa8.1 °C0.3 °C1,643 h119 628 l80.0 %

Temperature records of the last 73 years

The hottest temperature measured from 1949 to March 2022 was reported by the Joensuu Airp weather station. In July 2010 the record temperature of 37.2 °C was reported here. The hottest summer from July to September, based on all 28 weather stations in Finland , was recorded in 1949 with an average temperature of 15.7 °C. This average temperature will normally be measured every 4 to 6 hours, thus also including the nights. Normally, this value is 13.4 degrees Celsius.

The coldest day in these 73 years was reported by the weather station Sodankyla. Here the temperature dropped to -49.5 °C in January 1999. Sodankyla lies at an altitude of 179 meters above sea level. The coldest winter (January to March) was in 1985 with an average temperature of -13.3 °C. In Finland, it is usual to have about 6.6 degrees more at -6.6 °C for this three-month period.

The most precipitation fell in June 1995. With 8.1 mm per day, the Kankaanpaa Niinisalo weather station recorded the highest monthly average of the last 73 years. Incidentally, the region with the most rainfall for the whole year is around Kankaanpaa Niinisalo. The driest region is near Utsjoki Kevo.




Long-term development of temperatures from 1959 - 2021

In contrast to single record values, a long-term development cannot simply be brought about by all weather stations in the country. Both the number and the locations are constantly changing. A simply calculated average value would give a falsified result. If several measuring stations in particularly cold mountain or coastal regions are added in one year, the average would already decrease as a result of this alone. If a station fails during the summer or winter months, it does not provide any values and falsifies the average again. The subsequent long-term development was therefore reduced to only 3 measuring points in order to have actually comparable data over as long a period as possible.

In the years 1959 to 2021 there were only these 3 weather stations in the whole country, which reported continuous temperature values (Sodankyla, Jyvaskyla, Jokioinen). From these weather reports we have created a long-term development that shows the monthly average temperatures. The hottest month in this entire period was July 2018 with 20.2 °C. January 1987 was the coldest month with an average temperature of -21.0 °C.

The average annual temperature was about 2.2 °C in the years after 1959 and about 3.8 °C in the last years before 2021. So in less than 63 years it has increased by about 1.5 °C. This trend only applies to the selected 3 weather stations in Finland. A considerably more comprehensive evaluation of the global warming has been provided separately.

Long-term development of temperatures in Finland

Data basis and methodology

The data of the individual measuring stations are based on the archives of the German Weather Service, individual values averaged and supplemented by own elements. In order to determine a representative national average, average values were first calculated for each part of the country, which were then summarized at the national level. Thus, if a disproportionate number of weather stations are located in a small area, their number does not affect the national average. There are 29 stations in Finland itself.In 7 cases, neighboring but nearby weather stations were also used to obtain more accurate values.
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