September 4 in San Mateo, through the years

Typical high: 30.9°. Hottest: 34° (2013). Coldest night: 22.7° (2025).

YEARHIGHLOWRAIN
2025 30.3° 22.7° 0.6 mm
2024 30.1° 25.2° 12 mm
2023 30.9° 23.2° 0 mm
2022 31.6° 24.9° 3.2 mm
2021 30.9° 23.6° 0 mm
2020 33° 26.4° 0.5 mm
2019 27.6° 23.5° 30.9 mm
2018 31.1° 25° 2.8 mm
2017 31° 24.6° 3.1 mm
2016 29.1° 24.3° 14.6 mm
2015 31.6° 24.3° 2.3 mm
2014 30.6° 23.5° 2.2 mm
2013 34° 24.2° 0 mm
2012 33° 23.7° 0 mm
2011 30.2° 23.3° 0 mm
2010 32.8° 23.3° 0 mm
2009 28.5° 22.7° 14.7 mm
2008 30.4° 24.4° 0.2 mm
2007 30.4° 24° 0.2 mm
2006 31.9° 22.7° 3.5 mm
2005 30.8° 23.5° 2.7 mm
2004 29.7° 25.6° 5.3 mm
2003 30.2° 23.7° 4.7 mm
2002 29.5° 24.4° 6.3 mm
2001 31.9° 23.9° 13.5 mm
2000 31.5° 24.3° 1.3 mm
1999 33.4° 22.7° 0 mm
1998 31.8° 22.9° 0.4 mm
1997 30.4° 23.2° 5.7 mm
1996 30° 23° 3.2 mm
Source: ERA5 reanalysis (Copernicus C3S)

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