August 21 in Keystone, through the years

Typical high: 21.4°. Hottest: 29.3° (2011). Coldest night: 4.2° (2021).

YEARHIGHLOWRAIN
2025 16.8° 7.2° 0.6 mm
2024 21.2° 9.7° 0.4 mm
2023 18.6° 1.8 mm
2022 23° 13.9° 3.2 mm
2021 20.5° 4.2° 0 mm
2020 21.5° 11.2° 0 mm
2019 26.8° 14.4° 0.2 mm
2018 25.5° 7.1° 0 mm
2017 21° 7.1° 0 mm
2016 21.3° 11.3° 1.3 mm
2015 11.9° 5.6 mm
2014 14.5° 6.3° 0 mm
2013 20.5° 6.2° 0 mm
2012 26.6° 13.9° 0.3 mm
2011 29.3° 11.1° 0 mm
2010 16.4° 8.6° 1 mm
2009 25.9° 14.1° 1.1 mm
2008 13.4° 8.7° 10.9 mm
2007 14.8° 8.7° 4.8 mm
2006 25.5° 9.6° 0 mm
2005 28.9° 11° 0 mm
2004 14.6° 8.5° 1.7 mm
2003 22.9° 9.7° 0 mm
2002 25.3° 6.2° 0 mm
2001 21.9° 5.5° 0 mm
2000 21.5° 6.2° 0 mm
1999 25.5° 11.8° 4.3 mm
1998 25.8° 11° 0 mm
1997 21.8° 14.2° 1.1 mm
1996 18.7° 5.7° 0 mm
Source: ERA5 reanalysis (Copernicus C3S)

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