September 4 in Ottawa, through the years

Typical high: 27.1°. Hottest: 36.3° (2012). Coldest night: 7.2° (2025).

YEARHIGHLOWRAIN
2025 21.8° 7.2° 0.1 mm
2024 27.5° 11.3° 0 mm
2023 34.8° 20.4° 0 mm
2022 24.5° 18.1° 0.8 mm
2021 23.6° 16° 0.3 mm
2020 27.8° 9.4° 0 mm
2019 23.7° 13.4° 0 mm
2018 30.1° 22.5° 5.2 mm
2017 25.7° 17.3° 0 mm
2016 26.2° 16.5° 0 mm
2015 31.8° 20.9° 0 mm
2014 32.6° 23.3° 3.3 mm
2013 31.5° 14.5° 0 mm
2012 36.3° 21.1° 1 mm
2011 21.5° 12.6° 0 mm
2010 22.2° 8.6° 0 mm
2009 24.2° 12.6° 0.2 mm
2008 17.7° 12.4° 10.4 mm
2007 32° 18.6° 0 mm
2006 21.4° 13.3° 4 mm
2005 30.6° 19.4° 0 mm
2004 28.3° 17° 0 mm
2003 25.7° 10.2° 0 mm
2002 28° 14.1° 0 mm
2001 27.5° 13.9° 0 mm
2000 25.1° 15° 0 mm
1999 32.9° 20.6° 0 mm
1998 28.8° 17.1° 0 mm
1997 20.8° 10° 0 mm
1996 29° 18.2° 0.1 mm
Source: ERA5 reanalysis (Copernicus C3S)

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