Weather on October 18
Joliet, IL
55 Years of Data
Avg High
62°F
Avg Low
41°F
Warmest
2025
72°F avg
Coldest
2022
36°F avg
About This Date
October 18th in Joliet, IL typically brings mild fall weather, with average highs around 62°F and lows near 41°F. Over 55 years of records, the warmest October 18th was in 2025 (72°F average), while the coldest was 2022 (36°F) — a 36°F range across recorded history. Precipitation has occurred on 33% of recorded October 18th dates, with snow falling 2% of the time. The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.1°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Joliet, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025warmest | 77° | 66° | 72° | — | — |
| 2024 | 65° | 33° | 49° | — | — |
| 2023 | 54° | 42° | 48° | — | — |
| 2022coldest | 40° | 33° | 36° | — | — |
| 2021 | 66° | 40° | 53° | — | — |
| 2020 | 64° | 39° | 52° | — | — |
| 2019 | 55° | 37° | 46° | — | — |
| 2018 | 51° | 30° | 41° | — | — |
| 2017 | 69° | 43° | 56° | — | — |
| 2016 | 77° | 53° | 65° | — | — |
| 2015 | 52° | 32° | 42° | — | — |
| 2014 | 58° | 45° | 51° | 0.05" | — |
| 2013 | 56° | 40° | 48° | 0.3" | — |
| 2012 | 67° | 46° | 56° | 1.42" | — |
| 2011 | 58° | 39° | 48° | — | — |
| 2010 | 72° | — | — | — | — |
| 2009 | 51° | 32° | 42° | — | — |
| 2008 | 56° | 43° | 49° | 0.03" | — |
| 2007 | 74° | 49° | 61° | 1.22" | — |
| 2006 | 59° | 51° | 55° | 0.25" | — |
| 2005 | 77° | 45° | 61° | 0.18" | — |
| 2004 | 55° | 30° | 43° | — | — |
| 2003 | 56° | 35° | 45° | — | — |
| 2002 | 60° | 40° | 50° | — | — |
| 2001 | 53° | 33° | 43° | — | — |
| 2000 | 64° | 44° | 54° | — | — |
| 1999 | 52° | 36° | 44° | — | — |
| 1998 | 72° | 57° | 64° | 3.68" | — |
| 1997 | 54° | 37° | 45° | — | — |
| 1996 | 73° | 43° | 58° | 1.32" | — |
| 1995 | 76° | 45° | 60° | — | — |
| 1994 | 79° | 58° | 68° | — | — |
| 1993 | 62° | 44° | 53° | — | — |
| 1992 | 50° | 29° | 39° | — | — |
| 1991 | 60° | 33° | 47° | 0.71" | — |
| 1990 | 75° | 38° | 56° | 1.85" | — |
| 1989 | 47° | 34° | 40° | — | — |
| 1988 | 67° | 47° | 57° | 2.79" | — |
| 1987 | 53° | 39° | 46° | — | — |
| 1986 | 74° | 38° | 56° | — | — |
| 1985 | 75° | 44° | 60° | 0.08" | — |
| 1984 | 61° | 42° | 51° | — | — |
| 1983 | 61° | 35° | 48° | — | — |
| 1982 | 60° | 37° | 49° | 0.03" | — |
| 1981 | 65° | 46° | 55° | 0.79" | — |
| 1980 | 68° | 40° | 54° | — | — |
| 1979 | 65° | 52° | 58° | — | — |
| 1978 | 58° | 31° | 44° | — | — |
| 1977 | 61° | 32° | 46° | — | — |
| 1976 | 58° | 28° | 43° | 0.1" | — |
| 1975 | 56° | 44° | 50° | 0.05" | — |
| 1974 | 60° | 41° | 51° | — | — |
| 1973 | 61° | 44° | 52° | — | — |
| 1972 | 45° | 31° | 38° | 0.3" | 1" |
| 1971 | 77° | 55° | 66° | — | — |
55 years of data from JOLIET