September 9 in Bo‘ston, through the years

Typical high: 27.3°. Hottest: 32.3° (2025). Coldest night: 4.1° (2009).

YEARHIGHLOWRAIN
2025 32.3° 14.8° 0 mm
2024 23.9° 10° 0 mm
2023 31.2° 14° 0 mm
2022 29.4° 12.5° 0 mm
2021 29.2° 13.8° 0 mm
2020 26.4° 8.9° 0 mm
2019 22.5° 12.4° 0 mm
2018 29.6° 11.6° 0 mm
2017 29.6° 12° 0 mm
2016 29° 13.3° 0 mm
2015 28.5° 11.3° 0 mm
2014 27.4° 10.7° 0 mm
2013 30.5° 12.6° 0 mm
2012 27.5° 9.5° 0 mm
2011 28.8° 12° 0 mm
2010 28.3° 11.4° 0 mm
2009 20.8° 4.1° 0 mm
2008 25.3° 8.2° 0 mm
2007 27.7° 10.6° 0 mm
2006 27.2° 8.7° 0 mm
2005 26.9° 12.9° 0 mm
2004 28.2° 12.6° 0 mm
2003 29.4° 12.8° 0 mm
2002 25° 0 mm
2001 28.1° 12.3° 0 mm
2000 25.9° 0 mm
1999 25° 0 mm
1998 24.1° 13.1° 2.1 mm
1997 22.1° 7.6° 0.2 mm
1996 30.1° 11.3° 0 mm
Source: ERA5 reanalysis (Copernicus C3S)

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