Weather on October 18
Joliet, IL
55 Years of Data
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° | — | — |
Joliet, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Joliet, IL Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Joliet, IL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Joliet, IL
Joliet, IL has no months that meet our "pleasant" threshold — every season has tradeoffs.