Weather on August 9
Naperville, IL
55 Years of Data
Avg High
85°F
Avg Low
62°F
Warmest
2001
85°F avg
Coldest
1972
60°F avg
About This Date
August 9th in Naperville, IL typically brings warm summer weather, with average highs around 85°F and lows near 62°F. Over 54 years of records, the warmest August 9th was in 2001 (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 31% of August 9th dates historically, with the wettest August 9th recording 1.45" 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 Naperville, IL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 90° | 72° | 81° | — | — |
| 2024 | 82° | 56° | 69° | — | — |
| 2023 | 84° | 60° | 72° | — | — |
| 2022 | 79° | 59° | 69° | 1.17" | — |
| 2021 | 91° | 69° | 80° | 0.76" | — |
| 2020 | 86° | 65° | 75° | — | — |
| 2019 | 87° | 54° | 70° | — | — |
| 2018 | 84° | 63° | 73° | — | — |
| 2017 | 83° | 55° | 69° | — | — |
| 2016 | 85° | 63° | 74° | — | — |
| 2015 | 81° | 64° | 72° | — | — |
| 2014 | 82° | 59° | 71° | — | — |
| 2013 | 79° | 55° | 67° | — | — |
| 2012 | 85° | 60° | 72° | — | — |
| 2011 | 83° | 63° | 73° | 1.42" | — |
| 2010 | 87° | 70° | 78° | 0.13" | — |
| 2009 | 91° | 69° | 80° | — | — |
| 2008 | 68° | 51° | 60° | — | — |
| 2007 | 89° | 70° | 79° | 0.64" | — |
| 2006 | 83° | 63° | 73° | — | — |
| 2005 | 94° | 62° | 78° | — | — |
| 2004 | 84° | 51° | 68° | — | — |
| 2003 | 77° | 59° | 68° | 0.56" | — |
| 2002 | 88° | 55° | 71° | — | — |
| 2001warmest | 96° | 73° | 85° | — | — |
| 2000 | 90° | 70° | 80° | — | — |
| 1999 | 80° | 50° | 65° | — | — |
| 1998 | 89° | 69° | 79° | 0.13" | — |
| 1997 | 86° | 60° | 73° | 0.1" | — |
| 1996 | 83° | 65° | 74° | — | — |
| 1995 | 87° | 66° | 77° | — | — |
| 1994 | 86° | 58° | 72° | — | — |
| 1993 | 82° | 57° | 70° | — | — |
| 1992 | 92° | 65° | 78° | — | — |
| 1991 | 82° | 63° | 72° | 0.74" | — |
| 1990 | 83° | 54° | 68° | — | — |
| 1989 | 83° | 59° | 71° | 0.69" | — |
| 1988 | 97° | 72° | 84° | 1.45" | — |
| 1987 | 78° | 71° | 75° | 0.43" | — |
| 1985 | 88° | 58° | 73° | — | — |
| 1984 | 96° | 65° | 80° | — | — |
| 1983 | 97° | 65° | 81° | — | — |
| 1982 | 85° | 58° | 71° | — | — |
| 1981 | 82° | 59° | 71° | — | — |
| 1980 | — | 75° | — | 1.14" | — |
| 1979 | 89° | 65° | 77° | 0.2" | — |
| 1978 | 86° | 65° | 75° | 0.99" | — |
| 1977 | 78° | 65° | 71° | 0.3" | — |
| 1976 | 83° | 47° | 65° | — | — |
| 1975 | 89° | 57° | 73° | — | — |
| 1974 | 85° | 63° | 74° | — | — |
| 1973 | 91° | 67° | 79° | — | — |
| 1972coldest | 72° | 48° | 60° | — | — |
| 1971 | 93° | 66° | 80° | 0.05" | — |
54 years of data from WHEATON 3 SE