September 9 in Santa Rosa, through the years

Typical high: 20.3°. Hottest: 22.5° (2018). Coldest night: 8.9° (1997).

YEARHIGHLOWRAIN
2025 21.7° 11.9° 1.5 mm
2024 21.3° 13.3° 1 mm
2023 20.5° 11.3° 1.3 mm
2022 21.6° 9.3° 1.1 mm
2021 21.6° 10.9° 1.9 mm
2020 19.7° 9.2° 1.9 mm
2019 21.9° 10.7° 1 mm
2018 22.5° 13.4° 2.4 mm
2017 18.7° 12.5° 12.8 mm
2016 22.3° 12.7° 3 mm
2015 20.8° 12.9° 2.9 mm
2014 22° 11.5° 1.5 mm
2013 20° 12.8° 7.2 mm
2012 21.9° 12.8° 2.3 mm
2011 17.3° 12° 9.2 mm
2010 21.9° 10.1° 5.6 mm
2009 20.6° 10.3° 4.8 mm
2008 19.8° 13.8° 4.9 mm
2007 19.3° 12° 1.2 mm
2006 20.7° 11.7° 1.5 mm
2005 20.4° 12.9° 1.9 mm
2004 18.6° 11.5° 12.9 mm
2003 18.6° 11.4° 5.9 mm
2002 21.1° 12.5° 1.6 mm
2001 19.9° 10.3° 8.5 mm
2000 18.2° 11.7° 24.1 mm
1999 17.5° 10.9° 9.5 mm
1998 17.9° 11.6° 9.9 mm
1997 19.9° 8.9° 6.5 mm
1996 19.7° 11.6° 3.5 mm
Source: ERA5 reanalysis (Copernicus C3S)

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