Weather on October 20
Joliet, IL
55 Years of Data
Avg High
60°F
Avg Low
40°F
Warmest
1971
69°F avg
Coldest
1992
35°F avg
About This Date
October 20th in Joliet, IL typically brings mild fall weather, with average highs around 60°F and lows near 40°F. Over 55 years of records, the warmest October 20th was in 1971 (69°F average), while the coldest was 1992 (35°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 25% of October 20th dates historically, with the wettest October 20th recording 2.54" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for October 20th in Joliet, IL? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 68° | 35° | 52° | — | — |
| 2024 | 71° | 41° | 56° | — | — |
| 2023 | 67° | 39° | 53° | 0.25" | — |
| 2022 | 51° | 32° | 42° | — | — |
| 2021 | 71° | 48° | 60° | — | — |
| 2020 | 55° | 37° | 46° | 0.15" | — |
| 2019 | 68° | 43° | 55° | — | — |
| 2018 | 54° | 42° | 48° | 0.23" | — |
| 2017 | 80° | 53° | 67° | — | — |
| 2016 | 57° | 43° | 50° | — | — |
| 2015 | 72° | 48° | 60° | — | — |
| 2014 | 54° | 34° | 44° | — | — |
| 2013 | 54° | 40° | 47° | 0.13" | — |
| 2012 | 51° | 38° | 44° | 0.13" | — |
| 2011 | 47° | 41° | 44° | 0.13" | — |
| 2010 | 61° | 33° | 47° | — | — |
| 2009 | 66° | 43° | 54° | — | — |
| 2008 | 63° | 40° | 51° | — | — |
| 2007 | 60° | 48° | 54° | — | — |
| 2006 | 44° | 34° | 39° | — | — |
| 2005 | 58° | 49° | 53° | — | — |
| 2004 | 53° | 49° | 51° | — | — |
| 2003 | 72° | 51° | 61° | — | — |
| 2002 | 51° | 32° | 42° | — | — |
| 2001 | 65° | 41° | 53° | — | — |
| 2000 | 76° | 47° | 61° | — | — |
| 1999 | 60° | 36° | 48° | 0.03" | — |
| 1998 | 66° | 39° | 53° | — | — |
| 1997 | 67° | 35° | 51° | — | — |
| 1996 | 56° | 31° | 43° | — | — |
| 1995 | 79° | 46° | 62° | 2.54" | — |
| 1994 | 75° | 48° | 62° | 0.1" | — |
| 1993 | 63° | 52° | 57° | — | — |
| 1992coldest | 46° | 25° | 35° | 0.1" | — |
| 1991 | 56° | 33° | 44° | — | — |
| 1990 | 53° | 30° | 42° | — | — |
| 1989 | 40° | 33° | 36° | 0.86" | — |
| 1988 | 54° | 36° | 45° | — | — |
| 1987 | 56° | 39° | 47° | 0.86" | — |
| 1986 | 67° | 40° | 53° | — | — |
| 1985 | 61° | 51° | 56° | — | — |
| 1984 | 61° | 38° | 49° | — | — |
| 1983 | 54° | 42° | 48° | 0.1" | — |
| 1982 | 62° | 39° | 51° | 1.57" | — |
| 1981 | 50° | 32° | 41° | — | — |
| 1980 | 54° | 41° | 47° | — | — |
| 1979 | 74° | 65° | 69° | — | — |
| 1978 | 62° | 33° | 48° | — | — |
| 1977 | 60° | 36° | 48° | — | — |
| 1976 | 44° | 33° | 39° | — | — |
| 1975 | 53° | 41° | 47° | — | — |
| 1974 | 53° | 37° | 45° | — | — |
| 1973 | 75° | 40° | 57° | — | — |
| 1972 | 52° | 27° | 39° | — | — |
| 1971warmest | 84° | 54° | 69° | — | — |
55 years of data from JOLIET