Weather on September 11
Joliet, IL
55 Years of Data
Avg High
80°F
Avg Low
57°F
Warmest
2013
84°F avg
Coldest
1993
55°F avg
About This Date
September 11th in Joliet, IL typically brings warm fall weather, with average highs around 80°F and lows near 57°F. Over 54 years of records, the warmest September 11th was in 2013 (84°F average), while the coldest was 1993 (55°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 11th dates historically, with the wettest September 11th recording 1.4" of rain. The last decade has been 3.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 3.3°F cooler on this date compared to 20-30 years ago.
Planning for September 11th in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
Cooling Trend
0.4°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 84° | 60° | 72° | — | — |
| 2024 | 80° | 54° | 67° | — | — |
| 2023 | 79° | 52° | 65° | — | — |
| 2022 | 82° | 53° | 68° | — | — |
| 2021 | 78° | 55° | 67° | — | — |
| 2020 | 68° | 57° | 63° | 0.51" | — |
| 2019 | 87° | 68° | 78° | — | — |
| 2018 | 75° | 55° | 65° | — | — |
| 2017 | 70° | 50° | 60° | — | — |
| 2016 | 77° | 54° | 65° | 0.08" | — |
| 2015 | 75° | 58° | 66° | 1.17" | — |
| 2014 | 79° | 51° | 65° | 1.4" | — |
| 2013warmest | 94° | 74° | 84° | — | — |
| 2012 | 76° | 52° | 64° | — | — |
| 2011 | 73° | 59° | 66° | — | — |
| 2010 | 76° | 52° | 64° | 0.03" | — |
| 2009 | 82° | 63° | 72° | — | — |
| 2008 | 76° | 49° | 62° | — | — |
| 2007 | 82° | 64° | 73° | — | — |
| 2006 | 83° | 57° | 70° | 0.64" | — |
| 2005 | 91° | 67° | 79° | — | — |
| 2004 | 80° | 56° | 68° | — | — |
| 2003 | 83° | 64° | 73° | — | — |
| 2002 | 91° | 60° | 76° | — | — |
| 2001 | 79° | 53° | 66° | — | — |
| 2000 | 85° | 72° | 78° | 0.3" | — |
| 1999 | 76° | 47° | 61° | — | — |
| 1998 | 80° | 53° | 67° | — | — |
| 1997 | 72° | 53° | 62° | — | — |
| 1996 | 83° | 63° | 73° | — | — |
| 1995 | 69° | 50° | 60° | — | — |
| 1994 | 87° | 64° | 76° | — | — |
| 1993coldest | 65° | 45° | 55° | — | — |
| 1992 | 68° | 47° | 57° | 0.41" | — |
| 1991 | 84° | 64° | 74° | — | — |
| 1990 | 84° | 65° | 74° | — | — |
| 1989 | 76° | 58° | 67° | — | — |
| 1988 | 84° | 50° | 67° | — | — |
| 1987 | 82° | 59° | 71° | — | — |
| 1986 | 80° | 51° | 66° | 0.1" | — |
| 1985 | 73° | 56° | 64° | 0.05" | — |
| 1984 | 76° | 64° | 70° | 0.03" | — |
| 1983 | 93° | 57° | 75° | 0.86" | — |
| 1982 | 86° | 54° | 70° | — | — |
| 1981 | 86° | 62° | 74° | — | — |
| 1980 | 74° | 49° | 61° | — | — |
| 1979 | 86° | 61° | 73° | — | — |
| 1978 | 95° | 64° | 80° | — | — |
| 1977 | 74° | 47° | 60° | — | — |
| 1976 | 72° | 47° | 59° | — | — |
| 1975 | 84° | 56° | 70° | — | — |
| 1974 | 90° | 69° | 79° | — | — |
| 1973 | 78° | 59° | 69° | — | — |
| 1971 | 87° | 63° | 75° | — | — |
54 years of data from JOLIET