Weather on September 19
Joliet, IL
55 Years of Data
Avg High
77°F
Avg Low
55°F
Warmest
1988
77°F avg
Coldest
1991
51°F avg
About This Date
September 19th in Joliet, IL typically brings pleasant fall weather, with average highs around 77°F and lows near 55°F. Over 54 years of records, the warmest September 19th was in 1988 (77°F average), while the coldest was 1991 (51°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 28% of September 19th dates historically, with the wettest September 19th recording 5.84" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for September 19th in Joliet, IL? Great weather for outdoor activities.
Warming Trend
0.6°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 87° | 63° | 75° | — | — |
| 2024 | 86° | 57° | 72° | — | — |
| 2023 | 73° | 52° | 62° | — | — |
| 2022 | 84° | 62° | 73° | — | — |
| 2021 | 83° | 66° | 74° | — | — |
| 2020 | 63° | 46° | 54° | — | — |
| 2019 | 80° | 60° | 70° | — | — |
| 2018 | 83° | 65° | 74° | — | — |
| 2017 | 79° | 57° | 68° | 0.51" | — |
| 2016 | 81° | 57° | 69° | — | — |
| 2015 | 79° | 60° | 69° | 5.84" | — |
| 2014 | 71° | 49° | 60° | — | — |
| 2013 | 81° | 60° | 70° | 0.41" | — |
| 2012 | 63° | 44° | 53° | — | — |
| 2011 | 66° | 53° | 60° | 2.49" | — |
| 2010 | 66° | 55° | 61° | 0.74" | — |
| 2009 | 79° | 49° | 64° | — | — |
| 2008 | 76° | 56° | 66° | — | — |
| 2007 | 84° | 54° | 69° | — | — |
| 2006 | 71° | 47° | 59° | — | — |
| 2005 | 81° | 58° | 69° | 0.25" | — |
| 2004 | 77° | 57° | 67° | — | — |
| 2003 | 82° | 57° | 70° | — | — |
| 2002 | 82° | 62° | 72° | — | — |
| 2001 | 80° | 55° | 68° | 3.71" | — |
| 2000 | 89° | 56° | 72° | — | — |
| 1999 | 78° | 52° | 65° | — | — |
| 1998 | 83° | 63° | 73° | — | — |
| 1997 | 83° | 57° | 70° | 0.05" | — |
| 1996 | 75° | 50° | 63° | — | — |
| 1995 | 71° | 48° | 60° | — | — |
| 1994 | 79° | 55° | 67° | — | — |
| 1993 | 66° | 50° | 58° | — | — |
| 1992 | 72° | 45° | 58° | 0.03" | — |
| 1991coldest | 62° | 39° | 51° | — | — |
| 1990 | 62° | 52° | 57° | 0.03" | — |
| 1989 | 77° | 54° | 65° | — | — |
| 1988warmest | 87° | 67° | 77° | 0.56" | — |
| 1987 | 72° | 53° | 62° | — | — |
| 1986 | 72° | 55° | 63° | — | — |
| 1985 | 87° | 63° | 75° | — | — |
| 1984 | 77° | 47° | 62° | — | — |
| 1983 | 87° | 63° | 75° | 2.64" | — |
| 1982 | 87° | 45° | 66° | — | — |
| 1981 | 63° | 41° | 52° | — | — |
| 1980 | 75° | 46° | 61° | — | — |
| 1979 | 79° | 49° | 64° | — | — |
| 1978 | 85° | 67° | 76° | 0.46" | — |
| 1977 | 81° | 59° | 70° | — | — |
| 1976 | 79° | 55° | 67° | — | — |
| 1975 | 78° | 61° | 69° | 1.45" | — |
| 1974 | 88° | 59° | 73° | — | — |
| 1973 | 70° | 44° | 57° | — | — |
| 1971 | 63° | 56° | 59° | 1.52" | — |
54 years of data from JOLIET