Autumn ended in November with abundant snow

The average temperature for the month varied between about +2 degrees Celsius in the Southwest Archipelago to -12 degrees in Central and Northern Lapland. The average temperature was mostly 1.5‒3.5 degrees below the average of the 1991‒2020 reference period, while in Lapland the average temperature was mainly 3.0‒5.5 degrees below the average.

The highest temperature of the month, 10.2 degrees, was measured at Kalbådagrund in Porvoo, on 1 November. The lowest temperature of the month, -34.6 degrees, was measured at Tulppio in Savukoski, on 27 November.

November saw abundant snow

In the southern and central parts of the country, precipitation in November was in many places normal or slightly higher than usual. In the northern part of the country, precipitation in November was mainly lower than usual, and especially in the east, snowfall remained unusually low or even exceptionally low.

According to preliminary data, precipitation in November was heaviest at Jomalaby in Jomala, at 114.6 millimetres. The lowest amount of precipitation was measured at the Naruska observation station in Salla, 10.7 millimetres. The greatest amount of precipitation in a single day, 28.3 millimetres, was measured at the Kemiönsaari observation station, on 22 November.

At the end of November, snow depth was mostly 15–25 centimetres in the southern and central parts of the country and 25–50 centimetres in the northern part of the country. In many places, the amount of snow was unusually high compared to the season, and in some places even exceptionally high.

The entire country saw fewer hours of sunshine than usual, and Southern Finland exceptionally few.

The warm temperatures of early autumn changed to intense frosts

The average temperature for the autumn (September–November) ranged from about -3 degrees in the northwest of Finnish Lapland to about +8 degrees in the Southwest Archipelago. In most parts of the country, the autumn was 0.–1.5 degrees colder than usual, and only some parts of Southern Finland were slightly warmer than average. Similar autumn temperatures are experienced several times a decade.

The highest temperature of the autumn, 24.1 degrees, was recorded at Utti in Kouvola, on 12 September. The lowest temperature, -34.6 degrees, was measured at Tulppio in Savukoski, on 27 November.

The precipitation levels in the autumn were higher than average in most parts of the country, and in some places even unusually high. In the eastern part of the country, in Satakunta and in the Oulu region, precipitation levels were exceptionally high, in places.

According to preliminary data, precipitation was the highest at the Paljakka observation station in Puolanka, where the precipitation level was 324.2 millimetres in the September-November period. Precipitation was lowest in the village centre of Kilpisjärvi in Enontekiö, 90.0 millimetres.

Further information

Meteorologists call a weather phenomenon exceptional when its statistical occurrence is three times or less in 100 years on average. A phenomenon is seen as rare when it occurs less frequently than once every ten years on average.

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