Weather on September 1
Chicago, IL
55 Years of Data
Avg High
80°F
Avg Low
66°F
Warmest
2011
86°F avg
Coldest
1974
62°F avg
About This Date
September 1st in Chicago, IL typically brings warm fall weather, with average highs around 80°F and lows near 66°F. Over 53 years of records, the warmest September 1st was in 2011 (86°F average), while the coldest was 1974 (62°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 11% of September 1st dates historically, with the wettest September 1st recording 4.57" of rain. The last decade has been 2.9°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.9°F cooler on this date compared to 20-30 years ago.
Planning for September 1st in Chicago, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 63° | 68° | — | — |
| 2024 | 75° | 67° | 71° | — | — |
| 2023 | 83° | 60° | 71° | — | — |
| 2022 | 87° | 70° | 78° | — | — |
| 2021 | 76° | 69° | 72° | — | — |
| 2020 | 72° | 68° | 70° | — | — |
| 2019 | 70° | 62° | 66° | — | — |
| 2018 | 85° | 72° | 78° | — | — |
| 2017 | 67° | 58° | 62° | — | — |
| 2016 | 73° | 63° | 68° | — | — |
| 2015 | 88° | 73° | 80° | — | — |
| 2014 | 83° | 73° | 78° | — | — |
| 2013 | 80° | 69° | 75° | — | — |
| 2012 | 79° | 72° | 75° | — | — |
| 2011warmest | 97° | 75° | 86° | — | — |
| 2010 | 83° | 72° | 77° | — | — |
| 2009 | 68° | 60° | 64° | — | — |
| 2008 | 85° | 71° | 78° | — | — |
| 2007 | 79° | 65° | 72° | — | — |
| 2006 | 73° | 66° | 70° | — | — |
| 2005 | 81° | 70° | 75° | — | — |
| 2004 | 83° | 63° | 73° | — | — |
| 2003 | 66° | 62° | 64° | 2.16" | — |
| 2002 | 87° | 68° | 78° | — | — |
| 2001 | 77° | 58° | 67° | — | — |
| 2000 | 94° | 73° | 83° | — | — |
| 1999 | 85° | 63° | 74° | — | — |
| 1998 | 79° | 66° | 72° | — | — |
| 1997 | 85° | 63° | 74° | — | — |
| 1994 | 68° | 59° | 64° | — | — |
| 1993 | 75° | 60° | 68° | — | — |
| 1992 | 75° | 56° | 65° | — | — |
| 1991 | 76° | 60° | 68° | — | — |
| 1990 | 88° | 70° | 79° | — | — |
| 1989 | 80° | 67° | 73° | 4.57" | — |
| 1988 | 85° | 62° | 73° | — | — |
| 1987 | 75° | 54° | 64° | — | — |
| 1986 | 79° | 60° | 69° | — | — |
| 1985 | 81° | 66° | 73° | — | — |
| 1984 | 83° | 58° | 70° | 0.71" | — |
| 1983 | 83° | 67° | 75° | — | — |
| 1982 | 83° | 67° | 75° | 0.97" | — |
| 1981 | 85° | 68° | 76° | — | — |
| 1980 | 83° | 67° | 75° | 1.96" | — |
| 1979 | 87° | 69° | 78° | — | — |
| 1978 | 83° | 62° | 72° | — | — |
| 1977 | 89° | 70° | 79° | 4.42" | — |
| 1976 | 75° | 62° | 69° | — | — |
| 1975 | 72° | 65° | 68° | — | — |
| 1974coldest | 65° | 60° | 62° | — | — |
| 1973 | 90° | 77° | 83° | — | — |
| 1972 | 76° | 66° | 71° | — | — |
| 1971 | 82° | 66° | 74° | — | — |
53 years of data from CHICAGO GRANT PARK