September 1 in Grinnell, through the years

Typical high: 29.8°. Hottest: 38.5° (2011). Coldest night: 11° (2003).

YEARHIGHLOWRAIN
2025 24.9° 14.8° 0.2 mm
2024 29.4° 11.5° 0 mm
2023 36.2° 18.7° 0 mm
2022 32.1° 16.6° 4 mm
2021 33.4° 17.9° 0 mm
2020 26.8° 15° 0.7 mm
2019 29.6° 17.4° 0 mm
2018 28.3° 17.7° 2 mm
2017 28.1° 17.5° 0.4 mm
2016 24.9° 16.4° 0.2 mm
2015 34.6° 18.3° 0.7 mm
2014 26.3° 13.1° 0 mm
2013 29.9° 18° 0 mm
2012 34.2° 16.7° 0 mm
2011 38.5° 23.3° 0.1 mm
2010 27.3° 16.1° 0 mm
2009 26.4° 12.6° 0 mm
2008 32° 21.5° 0 mm
2007 31.9° 17.7° 0 mm
2006 23.4° 16.1° 17.8 mm
2005 28.4° 11.5° 0 mm
2004 30.7° 14.2° 0 mm
2003 25.9° 11° 0 mm
2002 31.4° 19.6° 0 mm
2001 31.1° 16.9° 0 mm
2000 32.9° 14.7° 0 mm
1999 32.2° 20.8° 0.7 mm
1998 25.7° 16.6° 0.6 mm
1997 32° 20.3° 0 mm
1996 25.8° 16.3° 0 mm
Source: ERA5 reanalysis (Copernicus C3S)

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