Autumn was unusually warm
Photo: Pixabay.According to the statistics of the Finnish Meteorological Institute, this autumn (September–November) was unusually or exceptionally warm almost throughout the whole country. For example, Rankki in Kotka recorded the warmest autumn of its observation history of over 90 years.
‘The average autumn temperature in the entire Finland makes this the fourth warmest autumn in our recording history. Autumn 2020 was the warmest one and only about 0.17 degrees warmer than this autumn,’ says meteorologist Pauli Jokinen.
The average temperature in the autumn varied from about 1 degrees in north-west arm of Finnish Lapland to +10 degrees along the country’s southern coast. The highest temperature for the month, 28 degrees Celsius, was recorded in Kaarina and Turku on 5 September. The lowest temperature, -27.3 degrees, was measured at Tulppio in Savukoski, on 28 November.
Precipitation levels were higher than usual in the western part of the country and in Northern Lapland, while the area from North Karelia to South Karelia remained below the long-term average.
According to preliminary data, precipitation was the highest at the Helsinki-Vantaa airport, where the precipitation level was 316.5 millimetres in the September-November period. The lowest amount of precipitation, 105.4 millimetres, was recorded at the Mekrijärvi observation station in Ilomantsi.
November was milder than usual everywhere in Finland
The average temperature in November varied between approximately +5 degrees in the south-western archipelago and -5 degrees in Central Lapland. The average temperature was mostly 1‒2 degrees above the average of the reference period 1991‒2020; in Northern Lapland, the average temperature was 3‒4 degrees above the average.
The highest temperature of the month, 12.6 degrees, was measured at Nellim in Inari on 8 November. The lowest temperature of the month, -27.3 degrees, was measured at Tulppio in Savukoski on 28 November.
High precipitation levels in the west in November
Precipitation in November was higher than usual in the southern and western parts of the country and in Northern Lapland, and in places from Uusimaa to Pirkanmaa it was unusually rainy. In North Ostrobothnia and Southern Lapland, precipitation levels were lower than usual.
According to preliminary information, precipitation in November was the heaviest in Pirttikoski in Hämeenlinna, at 137.3 millimetres. The lowest rainfall was at the Kemijärvi airport, 23.2 mm. The highest volume of precipitation recorded in a single day, 43.9 millimetres, was measured at the Sallila observation station in Huittinen on 25 November.
At the end of November, there was snow mainly in the area from Kainuu to Lapland (5–20 centimetres) and in Northern Lapland (20–40 centimetres).
On 1 November, the storm Lyly caused snowfall in the southern and western parts of the country, and the Kylmäpihlaja observation station in Rauma measured the first hurricane-level reading in Finnish sea areas: the average wind speed reached 33.5 m/s. On 20–21 November, the storm Jari also brought snow in its wake to the southern and central parts of the country, but by the end of the month, the snow from both storms had mostly melted in the southern and central parts of the country.
In November, hours of sunshine ranged from 6 hours in Kevo in Utsjoki to approximately 43 hours in Artukainen in Turku. The number of sunshine hours was usual.
Further information:
See past weather statistics in the Download observations service
Weather statistics from the Climate Service on weekdays, tel. +358 600 1 0601 (€ 4.06/min + local network fee)