Weather on September 29
Joliet, IL
55 Years of Data
Avg High
71°F
Avg Low
50°F
Warmest
1971
79°F avg
Coldest
1984
46°F avg
About This Date
September 29th in Joliet, IL typically brings pleasant fall weather, with average highs around 71°F and lows near 50°F. Over 54 years of records, the warmest September 29th was in 1971 (79°F average), while the coldest was 1984 (46°F) — a 33°F range across recorded history. Rain or other precipitation has occurred on about 26% of September 29th dates historically, with the wettest September 29th recording 1.85" of rain. The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
The last decade has been 3.5°F warmer on this date compared to 20-30 years ago.
Planning for September 29th in Joliet, IL? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 57° | 73° | — | — |
| 2024 | 70° | 62° | 66° | 0.13" | — |
| 2023 | 71° | 54° | 62° | — | — |
| 2022 | 63° | 40° | 51° | — | — |
| 2021 | 76° | 58° | 67° | — | — |
| 2020 | — | 43° | — | — | — |
| 2019 | 66° | 59° | 63° | 1.02" | — |
| 2018 | 70° | 40° | 55° | — | — |
| 2017 | 72° | 51° | 61° | — | — |
| 2016 | 61° | 51° | 56° | 0.89" | — |
| 2015 | 78° | 57° | 68° | — | — |
| 2014 | 81° | 56° | 68° | — | — |
| 2013 | 83° | 40° | 61° | 0.51" | — |
| 2012 | 69° | 46° | 58° | — | — |
| 2011 | 65° | 50° | 57° | 0.46" | — |
| 2010 | 71° | 48° | 60° | — | — |
| 2009 | 61° | 48° | 54° | — | — |
| 2008 | 72° | 55° | 63° | — | — |
| 2007 | 73° | 50° | 62° | — | — |
| 2006 | 58° | 41° | 49° | — | — |
| 2005 | 75° | 45° | 60° | 1.32" | — |
| 2004 | 67° | 49° | 58° | — | — |
| 2003 | 54° | 40° | 47° | — | — |
| 2002 | 77° | 51° | 64° | — | — |
| 2001 | 57° | 48° | 53° | — | — |
| 2000 | 67° | 46° | 56° | — | — |
| 1999 | 69° | 52° | 60° | 1.35" | — |
| 1998 | 79° | 57° | 68° | — | — |
| 1997 | 68° | 54° | 61° | — | — |
| 1996 | 62° | 47° | 54° | — | — |
| 1995 | 80° | 51° | 66° | — | — |
| 1994 | 65° | 44° | 54° | — | — |
| 1993 | 60° | 39° | 50° | — | — |
| 1992 | 60° | 38° | 49° | — | — |
| 1991 | 67° | 49° | 58° | — | — |
| 1990 | 73° | 55° | 64° | 0.05" | — |
| 1989 | 73° | 41° | 57° | — | — |
| 1988 | 75° | 57° | 66° | — | — |
| 1987 | 81° | 59° | 70° | 0.94" | — |
| 1986 | 85° | 66° | 75° | — | — |
| 1985 | 77° | 42° | 60° | — | — |
| 1984coldest | 56° | 36° | 46° | — | — |
| 1983 | 81° | 51° | 66° | — | — |
| 1982 | 78° | 58° | 68° | — | — |
| 1981 | 68° | 40° | 54° | 1.14" | — |
| 1980 | 65° | 47° | 56° | 0.53" | — |
| 1979 | 84° | 50° | 67° | — | — |
| 1978 | 66° | 41° | 54° | — | — |
| 1977 | 72° | 46° | 59° | — | — |
| 1976 | 65° | 47° | 56° | — | — |
| 1975 | 74° | 49° | 61° | 0.64" | — |
| 1974 | 78° | 48° | 63° | 1.85" | — |
| 1973 | 77° | 59° | 68° | 0.86" | — |
| 1971warmest | 89° | 68° | 79° | — | — |
54 years of data from JOLIET