Autumn was exceptionally rainy on the southern coast

13.12.2017 10:49

Local records for autumn precipitation were broken at the Nurmijärvi, Virolahti and Hyvinkää observation stations.

Photo: Antonin Halas

Photo: Antonin Halas

According to the Finnish Meteorological Institute statistics, autumn – from September to November – saw higher levels of precipitation than usual in large parts of the country. Autumn was exceptionally rainy in Uusimaa and Kymenlaakso; levels like this are seen on average less than every 30 years. Precipitation levels were up to 1.5 times the normal on the southern coast.

For the long-operating observation stations, the precipitation levels of this autumn broke records at the Nurmijärvi, Virolahti and Hyvinkää observation stations. The most rain recorded in the autumn was in Nuuksio, Espoo with 415.9 mm. However, the station has only been in operation for a few years, so it cannot be stated as a record number for Nuuksio.

Due to unsettled weather, autumn was especially cloudy in many areas.

Autumn was about one degree warmer than usual throughout the entire country. A previous warmer autumn was recorded in 2016 or 2015 depending on location.

November was mild and rainy

In most parts of the country, November was 1–3 degrees warmer than usual. The largest deviation from the usual was seen in the eastern part of the country, while the smallest deviation was in northern Lapland. November was warmer in 2015 in large parts of the country, although last year was warmer in parts of Lapland.

The highest temperature in November was 9.8°C, recorded in Utö and in Kumpula, Helsinki on 4 November. The lowest temperature was -28.4°C, recorded in Kevojärvi, Utsjoki on 23 November.

In many areas, November was rainier than usual. Near the southern coast and in northern Lapland, precipitation was unusually high; more rain is seen on average less than every 10 years. The highest level of precipitation, 130.4 mm, was measured in Anjala, Kouvola and the lowest, 31.3 mm, in Näkkälä, Enontekiö.

A usual amount of sunshine was recorded in most parts of the country, although in November, the usual amount is only 20–40 hours of sunshine. At the end of the month, there was snow everywhere else except in the southern and western parts of the country. The most snow was 57 cm recorded in the Kenttärova station in Kittilä.

Further information:

http://ilmatieteenlaitos.fi/ilmasto
http://www.ilmastokatsaus.fi/

Meteorologists tweet about the weather on Twitter: @meteorologit