September 10 in Sion, through the years

Typical high: 30.5°. Hottest: 34.4° (2024). Coldest night: 17.3° (2012).

YEARHIGHLOWRAIN
2025 29.6° 20.3° 2.9 mm
2024 34.4° 18.2° 0 mm
2023 32.6° 18.9° 0 mm
2022 28.3° 20° 2.3 mm
2021 29.8° 19.3° 9.2 mm
2020 32.7° 17.7° 0 mm
2019 32.2° 22.2° 0 mm
2018 32.8° 17.7° 0 mm
2017 31.2° 18.2° 0 mm
2016 33.2° 18.4° 0 mm
2015 33.6° 21.9° 0 mm
2014 32.9° 17.4° 0.3 mm
2013 32° 17.5° 0 mm
2012 31.1° 17.3° 0.3 mm
2011 25.5° 19.2° 6.2 mm
2010 30.9° 17.3° 0 mm
2009 29.1° 19.4° 2.4 mm
2008 31.5° 18.7° 2.5 mm
2007 30.7° 20° 3.3 mm
2006 29.9° 18.5° 2.5 mm
2005 30.8° 19.8° 0.3 mm
2004 27.9° 18.4° 2.3 mm
2003 24.2° 18.7° 19.6 mm
2002 30.8° 17.8° 1.1 mm
2001 31° 19.8° 6.2 mm
2000 30° 19° 0.8 mm
1999 28.8° 19.9° 13 mm
1998 25.9° 19.9° 1.5 mm
1997 33.5° 20° 1 mm
1996 28.7° 18.7° 10.1 mm
Source: ERA5 reanalysis (Copernicus C3S)

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