Weather on September 1
Joliet, IL
55 Years of Data
Avg High
82°F
Avg Low
60°F
Warmest
1973
82°F avg
Coldest
2009
58°F avg
About This Date
September 1st in Joliet, IL typically brings warm fall weather, with average highs around 82°F and lows near 60°F. Over 54 years of records, the warmest September 1st was in 1973 (82°F average), while the coldest was 2009 (58°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 1st dates historically, with the wettest September 1st recording 9.32" of rain. The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.3°F cooler on this date compared to 20-30 years ago.
Planning for September 1st in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 77° | 56° | 66° | — | — |
| 2024 | 82° | 57° | 70° | — | — |
| 2023 | 78° | 52° | 65° | — | — |
| 2022 | 82° | 57° | 70° | — | — |
| 2021 | 83° | 65° | 74° | — | — |
| 2020 | 81° | 62° | 71° | — | — |
| 2019 | 75° | 60° | 68° | 0.64" | — |
| 2018 | 84° | 60° | 72° | 0.38" | — |
| 2017 | 73° | 58° | 65° | — | — |
| 2016 | 78° | 61° | 69° | — | — |
| 2015 | 86° | 63° | 74° | — | — |
| 2014 | 86° | 66° | 76° | — | — |
| 2013 | 78° | 66° | 72° | 0.15" | — |
| 2012 | 89° | 67° | 78° | — | — |
| 2011 | 88° | 65° | 76° | — | — |
| 2010 | 91° | 70° | 80° | 0.76" | — |
| 2009coldest | 69° | 47° | 58° | — | — |
| 2008 | 87° | 59° | 73° | — | — |
| 2007 | 78° | 56° | 67° | — | — |
| 2006 | 75° | 62° | 69° | — | — |
| 2005 | 80° | 62° | 71° | — | — |
| 2004 | 81° | 59° | 70° | — | — |
| 2003 | 74° | 60° | 67° | 2.59" | — |
| 2002 | 86° | 64° | 75° | — | — |
| 2001 | 84° | 56° | 70° | — | — |
| 2000 | 92° | 70° | 81° | — | — |
| 1999 | 77° | 55° | 66° | — | — |
| 1998 | 81° | 58° | 69° | — | — |
| 1997 | 84° | 60° | 72° | — | — |
| 1996 | 82° | 63° | 72° | — | — |
| 1995 | 86° | 66° | 76° | — | — |
| 1994 | 70° | 53° | 61° | — | — |
| 1993 | 75° | 56° | 65° | 0.3" | — |
| 1992 | 75° | 51° | 63° | — | — |
| 1991 | 83° | 61° | 72° | — | — |
| 1990 | 83° | 56° | 69° | — | — |
| 1989 | 77° | 61° | 69° | 4.34" | — |
| 1988 | 83° | 56° | 69° | — | — |
| 1987 | 73° | 49° | 61° | — | — |
| 1986 | 84° | 49° | 66° | — | — |
| 1985 | 78° | 57° | 68° | — | — |
| 1984 | 85° | 52° | 68° | 0.56" | — |
| 1983 | 82° | 61° | 71° | — | — |
| 1982 | 77° | 65° | 71° | — | — |
| 1981 | 84° | 66° | 75° | 1.02" | — |
| 1980 | 83° | 63° | 73° | 6.96" | — |
| 1979 | 85° | 64° | 74° | — | — |
| 1978 | 84° | 55° | 70° | — | — |
| 1977 | 89° | 66° | 78° | 9.32" | — |
| 1976 | 89° | 64° | 77° | — | — |
| 1975 | 78° | 61° | 69° | 0.18" | — |
| 1974 | 76° | 53° | 64° | — | — |
| 1973warmest | 93° | 71° | 82° | — | — |
| 1971 | 88° | 59° | 73° | — | — |
54 years of data from JOLIET