Weather on August 9
Joliet, IL
55 Years of Data
Avg High
84°F
Avg Low
63°F
Warmest
1973
85°F avg
Coldest
1972
60°F avg
About This Date
August 9th in Joliet, IL typically brings warm summer weather, with average highs around 84°F and lows near 63°F. Over 53 years of records, the warmest August 9th was in 1973 (85°F average), while the coldest was 1972 (60°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 28% of August 9th dates historically, with the wettest August 9th recording 3.94" 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 9th in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 74° | 82° | — | — |
| 2024 | 82° | 51° | 67° | — | — |
| 2023 | 82° | 60° | 71° | — | — |
| 2022 | 80° | 61° | 70° | 0.51" | — |
| 2021 | 88° | 68° | 78° | 0.25" | — |
| 2020 | 84° | 63° | 73° | — | — |
| 2019 | 86° | 60° | 73° | — | — |
| 2018 | 83° | 65° | 74° | — | — |
| 2017 | 80° | 53° | 67° | — | — |
| 2016 | 83° | 67° | 75° | — | — |
| 2015 | 84° | 64° | 74° | 0.03" | — |
| 2014 | 81° | 66° | 73° | — | — |
| 2013 | 79° | 59° | 69° | — | — |
| 2012 | — | 60° | — | 0.13" | — |
| 2011 | 84° | 65° | 74° | 2.39" | — |
| 2010 | 88° | 68° | 78° | — | — |
| 2009 | 88° | 71° | 79° | 0.03" | — |
| 2008 | 77° | 61° | 69° | — | — |
| 2007 | 86° | 72° | 79° | 0.53" | — |
| 2006 | 78° | 68° | 73° | — | — |
| 2005 | 88° | 67° | 77° | — | — |
| 2004 | 80° | 58° | 69° | — | — |
| 2003 | 78° | 64° | 71° | — | — |
| 2002 | 83° | 62° | 72° | — | — |
| 2001 | 94° | 72° | 83° | — | — |
| 2000 | 84° | 71° | 78° | — | — |
| 1999 | 74° | 55° | 64° | 0.03" | — |
| 1998 | 82° | 71° | 77° | — | — |
| 1997 | 82° | 60° | 71° | 0.05" | — |
| 1996 | 92° | 61° | 76° | — | — |
| 1995 | 84° | 67° | 75° | — | — |
| 1994 | 86° | 59° | 73° | — | — |
| 1993 | 79° | 59° | 69° | — | — |
| 1992 | 85° | 67° | 76° | — | — |
| 1991 | 80° | 59° | 70° | — | — |
| 1990 | 80° | 53° | 67° | — | — |
| 1989 | 78° | 52° | 65° | — | — |
| 1988 | 99° | 71° | 85° | 3.94" | — |
| 1986 | 81° | 55° | 68° | 0.05" | — |
| 1985 | 86° | 59° | 73° | — | — |
| 1984 | 90° | 69° | 79° | — | — |
| 1983 | 94° | 66° | 80° | — | — |
| 1982 | 86° | 58° | 72° | — | — |
| 1981 | 78° | 61° | 69° | — | — |
| 1980 | 93° | 71° | 82° | 0.18" | — |
| 1979 | 90° | 63° | 76° | 2.49" | — |
| 1978 | 87° | 60° | 74° | 0.84" | — |
| 1977 | 79° | 64° | 71° | 0.66" | — |
| 1976 | 79° | 53° | 66° | — | — |
| 1974 | 87° | 64° | 76° | — | — |
| 1973warmest | 91° | 78° | 85° | — | — |
| 1972coldest | 72° | 48° | 60° | — | — |
| 1971 | 92° | 71° | 81° | — | — |
53 years of data from JOLIET