September 1 in Koso, through the years

Typical high: 22.5°. Hottest: 24.7° (1997). Coldest night: 12.8° (1999).

YEARHIGHLOWRAIN
2025 21.8° 14.6° 13.7 mm
2024 19.1° 14.5° 9.2 mm
2023 23.7° 14.3° 2.1 mm
2022 22.9° 14.3° 2.7 mm
2021 21.9° 14.4° 10.6 mm
2020 20.6° 15° 7.2 mm
2019 23.4° 15.1° 8.9 mm
2018 23.3° 15.2° 9.2 mm
2017 22° 14.6° 35.7 mm
2016 22° 13.6° 11.7 mm
2015 22.8° 15.4° 1.1 mm
2014 22° 14.9° 18.3 mm
2013 23.4° 14.4° 0.8 mm
2012 24.2° 15.2° 8.1 mm
2011 22.6° 13.2° 6.1 mm
2010 21.2° 14.6° 15.7 mm
2009 23.3° 14.4° 2.3 mm
2008 24.4° 14.1° 1 mm
2007 23.2° 15.4° 6.2 mm
2006 19.7° 14.2° 18.3 mm
2005 22.8° 13.4° 1.7 mm
2004 22.1° 14.8° 15.5 mm
2003 22.4° 13.5° 5 mm
2002 22.5° 13.7° 0.7 mm
2001 22.3° 14.2° 22.6 mm
2000 23° 14.3° 4.8 mm
1999 22.7° 12.8° 9.3 mm
1998 21.9° 14.3° 5.4 mm
1997 24.7° 13.6° 0.2 mm
1996 21.9° 14° 3.8 mm
Source: ERA5 reanalysis (Copernicus C3S)

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