Weather on September 26
Joliet, IL
55 Years of Data
Avg High
73°F
Avg Low
51°F
Warmest
1986
80°F avg
Coldest
2001
45°F avg
About This Date
September 26th 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 26th was in 1986 (80°F average), while the coldest was 2001 (45°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 31% of September 26th dates historically, with the wettest September 26th recording 2.92" of rain. The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 6.8°F warmer on this date compared to 20-30 years ago.
Planning for September 26th in Joliet, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Warming Trend
1.2°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 52° | 68° | — | — |
| 2024 | 76° | 55° | 65° | — | — |
| 2023 | 79° | 63° | 71° | 0.13" | — |
| 2022 | 65° | 48° | 56° | — | — |
| 2021 | 70° | 49° | 59° | — | — |
| 2020 | 78° | 54° | 66° | — | — |
| 2019 | 78° | 57° | 68° | — | — |
| 2018 | 83° | 49° | 66° | 0.41" | — |
| 2017 | 89° | 65° | 77° | — | — |
| 2016 | 86° | 58° | 72° | 0.13" | — |
| 2015 | 77° | 59° | 68° | — | — |
| 2014 | 75° | 55° | 65° | — | — |
| 2013 | 73° | — | — | — | — |
| 2012 | 74° | 53° | 63° | — | — |
| 2011 | 65° | 53° | 59° | 2.18" | — |
| 2010 | 61° | 41° | 51° | — | — |
| 2009 | 69° | 59° | 64° | 0.08" | — |
| 2008 | 80° | 58° | 69° | — | — |
| 2007 | 90° | 70° | 80° | — | — |
| 2006 | 71° | 44° | 58° | — | — |
| 2005 | 73° | 66° | 70° | 1.35" | — |
| 2004 | 72° | 50° | 61° | — | — |
| 2003 | 62° | 44° | 53° | — | — |
| 2002 | 75° | 50° | 63° | — | — |
| 2001coldest | 49° | 41° | 45° | — | — |
| 2000 | 55° | 37° | 46° | — | — |
| 1999 | 86° | 51° | 69° | — | — |
| 1998 | 84° | 63° | 73° | 0.03" | — |
| 1997 | 78° | 50° | 64° | — | — |
| 1996 | 67° | 46° | 56° | — | — |
| 1995 | 70° | 45° | 57° | — | — |
| 1994 | 68° | 51° | 60° | 0.23" | — |
| 1993 | 62° | 53° | 58° | 2.92" | — |
| 1992 | 74° | 48° | 61° | 0.36" | — |
| 1991 | 61° | 36° | 48° | — | — |
| 1990 | 83° | 53° | 68° | — | — |
| 1989 | 70° | 40° | 55° | — | — |
| 1988 | 79° | 47° | 63° | — | — |
| 1987 | 73° | 45° | 59° | — | — |
| 1986warmest | 90° | 70° | 80° | 0.08" | — |
| 1985 | 60° | 45° | 52° | — | — |
| 1984 | 70° | 38° | 54° | 0.81" | — |
| 1983 | 60° | 35° | 48° | 0.56" | — |
| 1982 | 58° | 48° | 53° | — | — |
| 1981 | 74° | 55° | 64° | 0.3" | — |
| 1980 | 79° | 39° | 59° | — | — |
| 1979 | 81° | 48° | 64° | — | — |
| 1978 | — | 41° | — | — | — |
| 1977 | 79° | 50° | 64° | 0.38" | — |
| 1976 | 64° | 50° | 57° | 0.48" | — |
| 1975 | 59° | 48° | 54° | — | — |
| 1974 | 84° | 50° | 67° | — | — |
| 1973 | 81° | 66° | 73° | — | — |
| 1971 | 77° | 52° | 64° | 0.25" | — |
54 years of data from JOLIET