Weather on September 23
Chicago, IL
55 Years of Data
About This Date
September 23rd in Chicago, IL typically brings pleasant fall weather, with average highs around 71°F and lows near 55°F. Over 54 years of records, the warmest September 23rd was in 2010 (80°F average), while the coldest was 1974 (49°F) — a 31°F range across recorded history. Rain or other precipitation has occurred on about 17% of September 23rd dates historically, with the wettest September 23rd recording 0.9" of rain. The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.6°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in Chicago, IL? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2026 | 64° | 59° | 62° | — | — |
| 2025 | 74° | 66° | 70° | — | — |
| 2024 | 67° | 63° | 65° | — | — |
| 2023 | 72° | 64° | 68° | — | — |
| 2022 | 63° | 54° | 58° | — | — |
| 2021 | 67° | 54° | 60° | — | — |
| 2020 | 78° | 62° | 70° | — | — |
| 2019 | 74° | 62° | 68° | — | — |
| 2018 | 67° | 54° | 60° | — | — |
| 2017 | 82° | 71° | 77° | — | — |
| 2016 | 73° | 68° | 71° | — | — |
| 2015 | 72° | 61° | 66° | — | — |
| 2014 | 71° | 54° | 62° | — | — |
| 2013 | 65° | 55° | 60° | — | — |
| 2012 | 64° | 47° | 55° | — | — |
| 2011 | 62° | 55° | 59° | — | — |
| 2010warmest | 91° | 68° | 80° | — | — |
| 2009 | 73° | 65° | 69° | — | — |
| 2008 | 82° | 66° | 74° | — | — |
| 2007 | 76° | 63° | 69° | — | — |
| 2006 | 73° | 60° | 67° | — | — |
| 2005 | 67° | 63° | 65° | — | — |
| 2004 | 85° | 62° | 73° | — | — |
| 2003 | 69° | 48° | 59° | — | — |
| 2002 | 71° | 46° | 59° | — | — |
| 2001 | 68° | 51° | 60° | 0.71" | — |
| 2000 | 72° | 59° | 65° | 0.01" | — |
| 1999 | 81° | 52° | 66° | — | — |
| 1998 | 67° | 50° | 58° | — | — |
| 1997 | 65° | 54° | 59° | — | — |
| 1994 | 75° | 62° | 69° | 0.12" | — |
| 1993 | 76° | 50° | 63° | — | — |
| 1992 | 60° | 47° | 53° | — | — |
| 1991 | 66° | 48° | 57° | — | — |
| 1990 | 67° | 43° | 55° | — | — |
| 1989 | 78° | 39° | 59° | — | — |
| 1988 | 85° | 60° | 72° | 0.12" | — |
| 1987 | 71° | 52° | 61° | 0.01" | — |
| 1986 | 89° | 66° | 78° | 0.17" | — |
| 1985 | 76° | 62° | 69° | 0.9" | — |
| 1984 | 74° | 63° | 68° | 0.9" | — |
| 1983 | 58° | 40° | 49° | — | — |
| 1982 | 70° | 47° | 58° | — | — |
| 1981 | 63° | 46° | 54° | — | — |
| 1980 | 84° | 52° | 68° | 0.74" | — |
| 1979 | 68° | 48° | 58° | — | — |
| 1978 | 68° | 50° | 59° | — | — |
| 1977 | 69° | 55° | 62° | — | — |
| 1976 | 69° | 54° | 61° | — | — |
| 1975 | 61° | 50° | 55° | — | — |
| 1974coldest | 56° | 42° | 49° | — | — |
| 1973 | 66° | 57° | 62° | — | — |
| 1972 | 60° | 55° | 58° | — | — |
| 1971 | 61° | 48° | 54° | — | — |
Chicago, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Chicago, IL Monthly Precipitation
Average rainfall per month, in inches.
Chicago, IL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Chicago, IL
Most pleasant months in Chicago, IL: May, June, July, August, September.
What to expect on September 23rd
This page shows what actually happened each year. For the odds — typical high and low, and how often it stays dry — see the climatological outlook for this date.
September 23rd outlook →