Weather on October 31
Chicago, IL
55 Years of Data
Avg High
58°F
Avg Low
44°F
Warmest
1974
70°F avg
Coldest
2023
33°F avg
About This Date
October 31st in Chicago, IL typically brings cool fall weather, with average highs around 58°F and lows near 44°F. Over 55 years of records, the warmest October 31st was in 1974 (70°F average), while the coldest was 2023 (33°F) — a 37°F range across recorded history. Rain or other precipitation has occurred on about 18% of October 31st dates historically, with the wettest October 31st recording 1.91" of rain. The last decade has been 7.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 7.5°F cooler on this date compared to 20-30 years ago.
Planning for October 31st in Chicago, IL? Bring layers as temperatures can vary throughout the day.
Cooling Trend
1.3°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 53° | 43° | 48° | — | — |
| 2024 | 71° | 44° | 58° | — | — |
| 2023coldest | 36° | 30° | 33° | — | — |
| 2022 | 56° | 53° | 54° | — | — |
| 2021 | 54° | 42° | 48° | — | — |
| 2020 | 59° | 35° | 47° | — | — |
| 2019 | 41° | 28° | 35° | — | — |
| 2018 | 53° | 49° | 51° | — | — |
| 2017 | 40° | 35° | 37° | — | — |
| 2016 | 62° | 45° | 53° | — | — |
| 2015 | 53° | 45° | 49° | — | — |
| 2014 | 48° | 36° | 42° | — | — |
| 2013 | 65° | 47° | 56° | — | — |
| 2012 | 49° | 37° | 43° | — | — |
| 2011 | 57° | 44° | 51° | — | — |
| 2010 | 52° | 47° | 49° | — | — |
| 2009 | 51° | 43° | 47° | — | — |
| 2008 | 73° | 53° | 63° | — | — |
| 2007 | 63° | 48° | 55° | — | — |
| 2006 | 63° | 38° | 50° | — | — |
| 2005 | 58° | 51° | 54° | — | — |
| 2004 | 57° | 45° | 51° | — | — |
| 2003 | 67° | 50° | 58° | — | — |
| 2002 | 50° | 33° | 42° | — | — |
| 2001 | 69° | 50° | 60° | — | — |
| 2000 | 72° | 52° | 62° | — | — |
| 1999 | 68° | 53° | 61° | — | — |
| 1998 | 60° | 55° | 58° | — | — |
| 1997 | 65° | 53° | 59° | — | — |
| 1996 | 42° | 27° | 34° | — | — |
| 1995 | 51° | 42° | 47° | 0.41" | — |
| 1994 | 63° | 45° | 54° | 1.91" | — |
| 1993 | 39° | 30° | 35° | 1.4" | — |
| 1992 | 52° | 44° | 48° | — | — |
| 1991 | 51° | 41° | 46° | 0.13" | — |
| 1990 | 74° | 49° | 61° | — | — |
| 1989 | 75° | 40° | 57° | 0.13" | — |
| 1988 | 50° | 30° | 40° | — | — |
| 1987 | 71° | 46° | 59° | — | — |
| 1986 | 64° | 44° | 54° | — | — |
| 1985 | 57° | 47° | 52° | 0.03" | — |
| 1984 | 55° | 45° | 50° | 0.76" | — |
| 1983 | 54° | 44° | 49° | 0.25" | — |
| 1982 | 68° | 55° | 62° | 0.18" | — |
| 1981 | 73° | 57° | 65° | — | — |
| 1980 | 61° | 39° | 50° | — | — |
| 1979 | 72° | 53° | 62° | — | — |
| 1978 | 70° | 48° | 59° | — | — |
| 1977 | 64° | 44° | 54° | — | — |
| 1976 | 50° | 41° | 46° | 0.43" | — |
| 1975 | 60° | 42° | 51° | — | — |
| 1974warmest | 76° | 64° | 70° | — | — |
| 1973 | 50° | 45° | 47° | — | — |
| 1972 | 46° | 43° | 44° | — | — |
| 1971 | 57° | 41° | 49° | — | — |
55 years of data from CHICAGO GRANT PARK