Weather on October 21
Joliet, IL
55 Years of Data
About This Date
October 21st 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 21st was in 1971 (72°F average), while the coldest was 1989 (37°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 29% of October 21st dates historically, with the wettest October 21st recording 1.91" 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 October 21st in Joliet, IL? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 62° | 47° | 54° | — | — |
| 2024 | 77° | 44° | 61° | — | — |
| 2023 | 61° | 42° | 51° | — | — |
| 2022 | 63° | 30° | 46° | — | — |
| 2021 | 71° | 50° | 61° | — | — |
| 2020 | 55° | 40° | 47° | 0.41" | — |
| 2019 | 63° | 47° | 55° | — | — |
| 2018 | 51° | 27° | 39° | — | — |
| 2017 | 78° | 50° | 64° | — | — |
| 2016 | 55° | 38° | 46° | — | — |
| 2015 | 76° | 55° | 65° | 0.13" | — |
| 2014 | 65° | 47° | 56° | — | — |
| 2013 | 66° | 41° | 54° | 0.13" | — |
| 2012 | 56° | 38° | 47° | — | — |
| 2011 | 48° | 38° | 43° | 0.03" | — |
| 2010 | 70° | 30° | 50° | — | — |
| 2009 | 64° | 48° | 56° | 0.05" | — |
| 2008 | 64° | 41° | 53° | 0.64" | — |
| 2007 | 75° | 46° | 61° | — | — |
| 2006 | 55° | 34° | 44° | 0.05" | — |
| 2005 | 53° | 48° | 51° | — | — |
| 2004 | 56° | 49° | 52° | — | — |
| 2003 | 85° | 51° | 68° | — | — |
| 2002 | 52° | 31° | 41° | — | — |
| 2001 | 69° | 45° | 57° | — | — |
| 2000 | 77° | 51° | 64° | — | — |
| 1999 | 54° | 35° | 44° | — | — |
| 1998 | 59° | 38° | 48° | — | — |
| 1997 | 53° | 36° | 44° | — | — |
| 1996 | 62° | 33° | 48° | — | — |
| 1995 | 46° | 39° | 43° | 0.38" | — |
| 1994 | 65° | 43° | 54° | — | — |
| 1993 | 58° | 40° | 49° | 0.84" | — |
| 1992 | 60° | 25° | 42° | — | — |
| 1991 | 67° | 38° | 52° | — | — |
| 1990 | 67° | 40° | 53° | — | — |
| 1989coldest | 41° | 34° | 37° | 0.15" | — |
| 1988 | 51° | 39° | 45° | 0.51" | — |
| 1987 | 55° | 31° | 43° | 0.2" | — |
| 1986 | 73° | 42° | 58° | — | — |
| 1985 | 65° | 51° | 58° | — | — |
| 1984 | 54° | 41° | 47° | 1.32" | — |
| 1983 | 51° | 43° | 47° | 1.91" | — |
| 1982 | 45° | 34° | 39° | 0.05" | — |
| 1981 | 70° | 45° | 57° | — | — |
| 1980 | 62° | 42° | 52° | — | — |
| 1979 | 79° | 66° | 72° | — | — |
| 1978 | 73° | 37° | 55° | — | — |
| 1977 | 64° | 37° | 51° | — | — |
| 1976 | 46° | 32° | 39° | — | — |
| 1975 | 72° | 42° | 57° | — | — |
| 1974 | 57° | 29° | 43° | — | — |
| 1973 | 69° | 37° | 53° | — | — |
| 1972 | 49° | 41° | 45° | 1.32" | — |
| 1971warmest | 81° | 63° | 72° | — | — |
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.