September 1 in Kostheenniemi, through the years

Typical high: 14.5°. Hottest: 19.7° (2025). Coldest night: -1.6° (2003).

YEARHIGHLOWRAIN
2025 19.7° 8.7° 0.5 mm
2024 18° 6.2° 0 mm
2023 13.7° 12° 20.1 mm
2022 9.5° 3.1° 0.3 mm
2021 12° 6.2° 0.5 mm
2020 16.1° 0.4° 0 mm
2019 18.5° 13.2° 0.3 mm
2018 17.2° 1.3° 0 mm
2017 10.7° 6.1° 2.9 mm
2016 18° 10.6° 12.3 mm
2015 13.2° 0 mm
2014 16.8° 5.2° 0 mm
2013 16.2° 8.6° 0 mm
2012 13.2° 8.9° 7.6 mm
2011 10.5° 6.5° 0 mm
2010 9.9° 2.1° 0 mm
2009 18° 10° 0 mm
2008 9.4° 2.5° 0 mm
2007 7.6° 0.4° 1.8 mm
2006 13° 10.2° 0 mm
2005 17.5° 6.1° 0 mm
2004 15.4° 9.3° 3.2 mm
2003 6.4° -1.6° 0 mm
2002 16.6° 5.1° 0 mm
2001 15.5° 10.2° 0.3 mm
2000 13.8° 5.8° 1.7 mm
1999 17.3° 11.2° 3.6 mm
1998 16.7° -1.6° 0 mm
1997 18.3° 9.9° 0 mm
1996 16.3° 7.6° 4.3 mm
Source: ERA5 reanalysis (Copernicus C3S)

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