Weather on August 15
Chicago, IL
55 Years of Data
Avg High
80°F
Avg Low
67°F
Warmest
1988
85°F avg
Coldest
2004
64°F avg
About This Date
August 15th in Chicago, IL typically brings warm summer weather, with average highs around 80°F and lows near 67°F. Over 53 years of records, the warmest August 15th was in 1988 (85°F average), while the coldest was 2004 (64°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 15% of August 15th dates historically, with the wettest August 15th recording 2.06" 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 August 15th in Chicago, IL? Stay hydrated and seek shade during peak afternoon hours.
Warming Trend
0.5°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 86° | 71° | 79° | — | — |
| 2024 | 74° | 67° | 70° | — | — |
| 2023 | 78° | 63° | 70° | 0.15" | — |
| 2022 | 76° | 67° | 71° | — | — |
| 2021 | 77° | 68° | 73° | — | — |
| 2020 | 83° | 71° | 77° | — | — |
| 2019 | 77° | 67° | 72° | — | — |
| 2018 | 83° | 71° | 77° | — | — |
| 2017 | 79° | 70° | 74° | — | — |
| 2016 | 75° | 70° | 72° | — | — |
| 2015 | 87° | 69° | 78° | — | — |
| 2014 | 77° | 59° | 68° | — | — |
| 2013 | 75° | 61° | 68° | — | — |
| 2012 | 88° | 70° | 79° | — | — |
| 2011 | 80° | 66° | 73° | — | — |
| 2010 | 87° | 73° | 80° | — | — |
| 2009 | 89° | 73° | 81° | — | — |
| 2008 | 77° | 69° | 73° | — | — |
| 2007 | 83° | 76° | 79° | — | — |
| 2006 | 79° | 67° | 73° | — | — |
| 2005 | 79° | 68° | 73° | — | — |
| 2004coldest | 74° | 54° | 64° | — | — |
| 2003 | 90° | 73° | 81° | — | — |
| 2002 | 88° | 65° | 76° | — | — |
| 2001 | 78° | 63° | 70° | 0.25" | — |
| 2000 | 93° | 74° | 83° | — | — |
| 1999 | 81° | 58° | 69° | — | — |
| 1998 | 81° | 68° | 74° | 0.18" | — |
| 1997 | 84° | 71° | 78° | — | — |
| 1994 | 74° | 60° | 67° | 0.13" | — |
| 1993 | 83° | 74° | 78° | 0.71" | — |
| 1992 | 71° | 62° | 67° | — | — |
| 1991 | 88° | 68° | 78° | — | — |
| 1990 | 83° | 65° | 74° | — | — |
| 1989 | 83° | 64° | 73° | 0.2" | — |
| 1988warmest | 94° | 76° | 85° | — | — |
| 1987 | 83° | 74° | 78° | — | — |
| 1986 | 83° | 72° | 77° | — | — |
| 1985 | 78° | 64° | 71° | 2.06" | — |
| 1984 | 90° | 65° | 77° | — | — |
| 1983 | 89° | 72° | 80° | — | — |
| 1982 | 82° | 63° | 72° | — | — |
| 1981 | 76° | 66° | 71° | 0.81" | — |
| 1980 | 79° | 68° | 73° | — | — |
| 1979 | 71° | 59° | 65° | — | — |
| 1978 | 89° | 72° | 80° | — | — |
| 1977 | 75° | 64° | 70° | — | — |
| 1976 | 69° | 66° | 68° | — | — |
| 1975 | 72° | 66° | 69° | — | — |
| 1974 | 76° | 67° | 71° | — | — |
| 1973 | 76° | 66° | 71° | — | — |
| 1972 | 69° | 64° | 67° | — | — |
| 1971 | 73° | 65° | 69° | — | — |
53 years of data from CHICAGO GRANT PARK