September 4 in Santa Rosa, through the years

Typical high: 17.8°. Hottest: 20.7° (2024). Coldest night: -6.7° (1996).

YEARHIGHLOWRAIN
2025 16° 1.9° 0.7 mm
2024 20.7° 1.5° 0 mm
2023 18° -3.4° 0 mm
2022 17° -0.2° 0 mm
2021 19.7° 0.7° 0 mm
2020 20.4° -0.7° 0 mm
2019 15.6° 1.6° 2.1 mm
2018 16.8° -1.3° 0 mm
2017 19.4° 5.9° 0.3 mm
2016 15.7° -5.4° 0 mm
2015 18.4° 3.9° 0.4 mm
2014 16.9° 1.4° 0 mm
2013 16.8° -2.3° 0 mm
2012 19.3° 1.7° 0 mm
2011 20.1° 1.2° 0 mm
2010 20.2° 0.3° 0 mm
2009 17.3° -2.3° 0 mm
2008 20.3° 2.2° 0 mm
2007 17° -0.1° 0 mm
2006 16.9° -4.8° 0 mm
2005 18.2° -5.2° 0 mm
2004 19° 3.4° 0 mm
2003 16.5° -0.4° 0 mm
2002 17.2° 3.5° 0 mm
2001 16.7° -0.6° 0.4 mm
2000 15.8° -4.1° 0 mm
1999 18.1° -0.6° 0 mm
1998 16.4° -4.1° 0 mm
1997 18.5° -1.7° 0 mm
1996 14.5° -6.7° 0 mm
Source: ERA5 reanalysis (Copernicus C3S)

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