September 5 in Keystone (historical), through the years

Typical high: 27.9°. Hottest: 34.1° (2023). Coldest night: 9.9° (2008).

YEARHIGHLOWRAIN
2025 20.4° 12.5° 0 mm
2024 30.9° 14.8° 0.7 mm
2023 34.1° 24.1° 0.2 mm
2022 25.9° 18.4° 0 mm
2021 27.3° 14.2° 0 mm
2020 31.2° 15.2° 0.8 mm
2019 31.5° 17° 0.2 mm
2018 24° 21.1° 30.5 mm
2017 22.8° 12.6° 0 mm
2016 31.2° 20.3° 0 mm
2015 33.2° 23° 0 mm
2014 27.7° 16.3° 1.1 mm
2013 30° 18.1° 0 mm
2012 31.3° 22.5° 0 mm
2011 21.4° 10.5° 0 mm
2010 29° 14.8° 0 mm
2009 26° 16.2° 0 mm
2008 19.6° 9.9° 0 mm
2007 30° 21.1° 0.2 mm
2006 25.8° 12.4° 0 mm
2005 29.8° 18.6° 0 mm
2004 28.4° 21.3° 5.7 mm
2003 26.3° 12.1° 0 mm
2002 31.1° 18.2° 0.3 mm
2001 29.4° 18° 0.7 mm
2000 24.8° 13.8° 0 mm
1999 26.3° 17.8° 13.9 mm
1998 32.2° 20.3° 0 mm
1997 26.1° 11.5° 0 mm
1996 28.5° 18° 0 mm
Source: ERA5 reanalysis (Copernicus C3S)

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