Weather on October 18
Chicago, IL
55 Years of Data
Avg High
62°F
Avg Low
46°F
Warmest
2007
71°F avg
Coldest
1972
37°F avg
About This Date
October 18th in Chicago, IL typically brings mild fall weather, with average highs around 62°F and lows near 46°F. Over 55 years of records, the warmest October 18th was in 2007 (71°F average), while the coldest was 1972 (37°F) — a 34°F range across recorded history. Rain or other precipitation has occurred on about 16% of October 18th dates historically, with the wettest October 18th recording 1.12" of rain. The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 4.3°F warmer on this date compared to 20-30 years ago.
Planning for October 18th in Chicago, IL? Great weather for outdoor activities.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 73° | 60° | 67° | — | — |
| 2024 | 69° | 47° | 58° | — | — |
| 2023 | 66° | 47° | 56° | — | — |
| 2022 | 46° | 36° | 41° | — | — |
| 2021 | 72° | 51° | 61° | — | — |
| 2020 | 59° | 42° | 51° | — | — |
| 2019 | 60° | 36° | 48° | — | — |
| 2018 | 58° | 41° | 49° | — | — |
| 2017 | 70° | 51° | 60° | — | — |
| 2016 | 76° | 60° | 68° | — | — |
| 2015 | 56° | 40° | 48° | — | — |
| 2014 | 51° | 44° | 48° | — | — |
| 2013 | 50° | 44° | 47° | — | — |
| 2012 | 56° | 46° | 51° | — | — |
| 2011 | 55° | 46° | 51° | — | — |
| 2010 | 60° | 53° | 57° | — | — |
| 2009 | 55° | 40° | 47° | — | — |
| 2008 | 63° | 50° | 56° | — | — |
| 2007warmest | 80° | 63° | 71° | — | — |
| 2006 | 63° | 45° | 54° | — | — |
| 2005 | 67° | 54° | 60° | — | — |
| 2004 | 50° | 42° | 46° | 0.03" | — |
| 2003 | 69° | 43° | 56° | — | — |
| 2002 | 61° | 38° | 49° | 0.08" | — |
| 2001 | 64° | 42° | 53° | — | — |
| 2000 | 69° | 45° | 57° | — | — |
| 1999 | 53° | 38° | 45° | — | — |
| 1998 | 68° | 45° | 56° | 0.69" | — |
| 1997 | 57° | 38° | 47° | — | — |
| 1996 | 55° | 39° | 47° | — | — |
| 1995 | 64° | 55° | 60° | — | — |
| 1994 | 79° | 62° | 70° | — | — |
| 1993 | 57° | 42° | 50° | — | — |
| 1992 | 50° | 39° | 45° | — | — |
| 1991 | 73° | 52° | 62° | — | — |
| 1990 | 78° | 40° | 59° | 1.12" | — |
| 1989 | 47° | 38° | 42° | 0.15" | — |
| 1988 | 62° | 47° | 54° | — | — |
| 1987 | 65° | 43° | 54° | — | — |
| 1986 | 58° | 41° | 49° | — | — |
| 1985 | 73° | 60° | 67° | 0.18" | — |
| 1984 | 62° | 50° | 56° | 0.1" | — |
| 1983 | 62° | 44° | 53° | — | — |
| 1982 | 69° | 46° | 58° | — | — |
| 1981 | 64° | 45° | 54° | 0.46" | — |
| 1980 | 68° | 45° | 56° | — | — |
| 1979 | 68° | 54° | 61° | — | — |
| 1978 | 60° | 46° | 53° | — | — |
| 1977 | 64° | 44° | 54° | 0.05" | — |
| 1976 | 49° | 38° | 43° | — | — |
| 1975 | 50° | 47° | 48° | — | — |
| 1974 | 46° | 40° | 43° | — | — |
| 1973 | 55° | 47° | 51° | — | — |
| 1972coldest | 41° | 32° | 37° | — | — |
| 1971 | 69° | 58° | 63° | — | — |
55 years of data from CHICAGO GRANT PARK