August 31 in Onnela, through the years

Typical high: 14.3°. Hottest: 19.2° (1997). Coldest night: -1.6° (2025).

YEARHIGHLOWRAIN
2025 14.2° -1.6° 0 mm
2024 15.9° 10.2° 7.3 mm
2023 15° 7.8° 4.1 mm
2022 10.3° 1.9° 0.8 mm
2021 15.6° 7.4° 4.6 mm
2020 12.2° 0.2 mm
2019 18.1° 13.5° 0.2 mm
2018 15.9° 0 mm
2017 15.9° 8.1° 0 mm
2016 13.2° 1.6 mm
2015 16.7° 7.4° 1.4 mm
2014 17.4° 5.4° 0 mm
2013 16° 2.7° 0 mm
2012 12.7° 5.2° 0 mm
2011 10.4° 7.2° 0 mm
2010 12.3° 4.3° 4.7 mm
2009 14.2° 10.5° 2.4 mm
2008 9.1° 0.4° 0 mm
2007 0.3° 0 mm
2006 15.4° 11.9° 0.2 mm
2005 15.6° 0 mm
2004 18.4° 4.9° 0 mm
2003 6.8° 1.1° 0 mm
2002 14.6° 8.7° 4.9 mm
2001 12.1° 8.7° 0.3 mm
2000 15.6° 8.8° 5.3 mm
1999 13.9° 6.4° 0 mm
1998 13.1° -1.1° 0 mm
1997 19.2° 8.9° 0 mm
1996 19.1° 13.6° 0.6 mm
Source: ERA5 reanalysis (Copernicus C3S)

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