Weather on September 23
Joliet, IL
55 Years of Data
Avg High
73°F
Avg Low
51°F
Warmest
2017
81°F avg
Coldest
1995
42°F avg
About This Date
September 23rd in Joliet, IL typically brings pleasant fall weather, with average highs around 73°F and lows near 51°F. Over 54 years of records, the warmest September 23rd was in 2017 (81°F average), while the coldest was 1995 (42°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 30% of September 23rd dates historically, with the wettest September 23rd recording 2.29" of rain. The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.3°F warmer on this date compared to 20-30 years ago.
Planning for September 23rd in Joliet, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 79° | 65° | 72° | — | — |
| 2024 | 71° | 61° | 66° | 0.76" | — |
| 2023 | 72° | 61° | 66° | 0.13" | — |
| 2022 | 64° | 49° | 56° | — | — |
| 2021 | 63° | 51° | 57° | — | — |
| 2020 | 77° | 46° | 62° | — | — |
| 2019 | 77° | 54° | 65° | 1.02" | — |
| 2018 | 67° | 51° | 59° | — | — |
| 2017warmest | 93° | 69° | 81° | — | — |
| 2016 | 84° | 64° | 74° | — | — |
| 2015 | 81° | 54° | 67° | — | — |
| 2014 | 67° | 46° | 56° | — | — |
| 2013 | 69° | 46° | 58° | — | — |
| 2012 | 58° | 41° | 49° | — | — |
| 2011 | 63° | 46° | 54° | — | — |
| 2010 | 74° | 63° | 68° | — | — |
| 2009 | 78° | 62° | 70° | — | — |
| 2008 | 84° | 60° | 72° | — | — |
| 2007 | 89° | 60° | 75° | — | — |
| 2006 | 74° | 57° | 65° | — | — |
| 2005 | 90° | 65° | 77° | — | — |
| 2004 | 82° | 53° | 68° | — | — |
| 2003 | 78° | 45° | 61° | 0.23" | — |
| 2002 | 82° | 44° | 63° | 0.28" | — |
| 2001 | 76° | 51° | 63° | — | — |
| 2000 | 73° | 50° | 62° | 1.27" | — |
| 1999 | 74° | 42° | 58° | — | — |
| 1998 | 72° | 48° | 60° | — | — |
| 1997 | 67° | 53° | 60° | 0.23" | — |
| 1996 | 74° | 52° | 63° | — | — |
| 1995coldest | 50° | 34° | 42° | — | — |
| 1994 | 74° | 55° | 64° | 0.64" | — |
| 1993 | 69° | 58° | 63° | 0.05" | — |
| 1992 | 63° | 44° | 53° | — | — |
| 1991 | 67° | 51° | 59° | 0.05" | — |
| 1990 | 67° | 44° | 55° | 0.05" | — |
| 1989 | 79° | 38° | 58° | — | — |
| 1988 | 88° | 53° | 70° | 1.4" | — |
| 1987 | 69° | 49° | 59° | — | — |
| 1986 | 89° | 64° | 77° | 0.69" | — |
| 1985 | 69° | 59° | 64° | 2.29" | — |
| 1984 | 74° | 62° | 68° | 0.05" | — |
| 1983 | 55° | 32° | 44° | — | — |
| 1982 | 65° | 43° | 54° | — | — |
| 1981 | 65° | 35° | 50° | — | — |
| 1980 | 86° | 45° | 65° | 0.41" | — |
| 1979 | 66° | 43° | 54° | — | — |
| 1978 | 67° | 43° | 55° | — | — |
| 1977 | 71° | 52° | 61° | — | — |
| 1976 | 74° | 42° | 58° | — | — |
| 1975 | 65° | 44° | 54° | — | — |
| 1974 | 62° | 32° | 47° | — | — |
| 1973 | 78° | 51° | 65° | — | — |
| 1971 | 73° | 53° | 63° | — | — |
54 years of data from JOLIET