Weather on October 15
Chicago, IL
55 Years of Data
About This Date
October 15th in Chicago, IL typically brings mild fall weather, with average highs around 63°F and lows near 48°F. Over 55 years of records, the warmest October 15th was in 1989 (74°F average), while the coldest was 1978 (44°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 16% of October 15th dates historically, with the wettest October 15th recording 1.65" of rain. The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
The last decade has been 2.2°F cooler on this date compared to 20-30 years ago.
Planning for October 15th in Chicago, IL? Great weather for outdoor activities.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 62° | 55° | 59° | — | — |
| 2024 | 50° | 42° | 46° | — | — |
| 2023 | 57° | 46° | 52° | — | — |
| 2022 | 53° | 38° | 45° | — | — |
| 2021 | 64° | 54° | 59° | — | — |
| 2020 | — | 45° | — | — | — |
| 2019 | 65° | 46° | 55° | — | — |
| 2018 | 49° | 39° | 44° | — | — |
| 2017 | 67° | 49° | 58° | — | — |
| 2016 | 71° | 55° | 63° | — | — |
| 2015 | 69° | 51° | 60° | — | — |
| 2014 | 56° | 52° | 54° | — | — |
| 2013 | 65° | 53° | 59° | — | — |
| 2012 | 56° | 48° | 52° | — | — |
| 2011 | 63° | 50° | 56° | — | — |
| 2010 | 62° | 52° | 57° | — | — |
| 2009 | 47° | 42° | 44° | — | — |
| 2008 | 65° | 53° | 59° | — | — |
| 2007 | 71° | 56° | 63° | — | — |
| 2006 | 54° | 37° | 45° | — | — |
| 2005 | 68° | 55° | 62° | — | — |
| 2004 | 53° | 45° | 49° | 0.23" | — |
| 2003 | 62° | 42° | 52° | — | — |
| 2002 | 60° | 40° | 50° | — | — |
| 2001 | 53° | 44° | 49° | 0.15" | — |
| 2000 | 69° | 53° | 61° | 0.08" | — |
| 1999 | 80° | 50° | 65° | — | — |
| 1998 | 66° | 50° | 58° | — | — |
| 1997 | 54° | 35° | 44° | — | — |
| 1996 | 79° | 54° | 66° | — | — |
| 1995 | 57° | 39° | 48° | — | — |
| 1994 | 64° | 53° | 59° | — | — |
| 1993 | 68° | 55° | 62° | — | — |
| 1992 | 62° | 50° | 56° | 1.02" | — |
| 1991 | 54° | 37° | 45° | — | — |
| 1990 | 67° | 43° | 55° | 0.69" | — |
| 1989warmest | 85° | 64° | 74° | — | — |
| 1988 | 74° | 56° | 65° | — | — |
| 1987 | 72° | 51° | 61° | — | — |
| 1986 | 53° | 37° | 45° | — | — |
| 1985 | 65° | 50° | 57° | 0.03" | — |
| 1984 | 71° | 61° | 66° | 1.65" | — |
| 1983 | 70° | 43° | 56° | — | — |
| 1982 | 63° | 50° | 56° | — | — |
| 1981 | 62° | 54° | 58° | 0.03" | — |
| 1980 | 65° | 49° | 57° | — | — |
| 1979 | 64° | 44° | 54° | — | — |
| 1978coldest | 51° | 37° | 44° | 0.08" | — |
| 1977 | 67° | 50° | 58° | — | — |
| 1976 | 70° | 52° | 61° | — | — |
| 1975 | 63° | 49° | 56° | — | — |
| 1974 | 50° | 44° | 47° | — | — |
| 1973 | 67° | 55° | 61° | — | — |
| 1972 | 51° | 41° | 46° | — | — |
| 1971 | 74° | 55° | 64° | — | — |
Chicago, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Chicago, IL Monthly Precipitation
Average rainfall per month, in inches.
Chicago, 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 Chicago, IL
Chicago, IL has no months that meet our "pleasant" threshold — every season has tradeoffs.