Weather on July 18
Joliet, IL
55 Years of Data
Avg High
86°F
Avg Low
65°F
Warmest
2012
88°F avg
Coldest
2009
62°F avg
About This Date
July 18th in Joliet, IL typically brings warm summer weather, with average highs around 86°F and lows near 65°F. Over 54 years of records, the warmest July 18th was in 2012 (88°F average), while the coldest was 2009 (62°F) — a 26°F range across recorded history. Rain or other precipitation has occurred on about 17% of July 18th dates historically, with the wettest July 18th recording 34.54" 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 July 18th in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 83° | 60° | 71° | — | — |
| 2024 | 82° | 62° | 72° | — | — |
| 2023 | 82° | 59° | 71° | — | — |
| 2022 | 77° | 69° | 73° | — | — |
| 2021 | 80° | 66° | 73° | — | — |
| 2020 | 84° | 66° | 75° | — | — |
| 2019 | 89° | 73° | 81° | — | — |
| 2018 | 85° | 61° | 73° | — | — |
| 2017 | 82° | 57° | 70° | — | — |
| 2016 | 83° | 65° | 74° | 2.79" | — |
| 2015 | 91° | 71° | 81° | 1.68" | — |
| 2014 | 77° | 56° | 66° | — | — |
| 2013 | 92° | 73° | 82° | — | — |
| 2012warmest | 99° | 77° | 88° | — | — |
| 2011 | 93° | 70° | 81° | 0.08" | — |
| 2010 | 91° | 69° | 80° | — | — |
| 2009coldest | 69° | 56° | 62° | — | — |
| 2008 | 87° | 71° | 79° | — | — |
| 2007 | 82° | 63° | 72° | 0.99" | — |
| 2006 | 92° | 73° | 82° | — | — |
| 2005 | 93° | 55° | 74° | — | — |
| 2004 | 78° | 62° | 70° | — | — |
| 2003 | 86° | 65° | 75° | 1.93" | — |
| 2002 | 89° | 71° | 80° | — | — |
| 2001 | 89° | 74° | 81° | — | — |
| 2000 | 85° | 56° | 70° | — | — |
| 1999 | 79° | 69° | 74° | 2.54" | — |
| 1998 | 86° | 66° | 76° | — | — |
| 1997 | 94° | 69° | 81° | — | — |
| 1996 | 81° | 67° | 74° | 34.54" | — |
| 1995 | 87° | 65° | 76° | — | — |
| 1994 | 82° | 62° | 72° | — | — |
| 1993 | 80° | 72° | 76° | — | — |
| 1992 | 82° | 61° | 71° | — | — |
| 1991 | 94° | 64° | 79° | — | — |
| 1990 | 83° | 59° | 71° | — | — |
| 1989 | 84° | 60° | 72° | — | — |
| 1988 | 92° | 70° | 81° | — | — |
| 1987 | 89° | 63° | 76° | — | — |
| 1986 | 96° | 71° | 84° | — | — |
| 1985 | 83° | 59° | 71° | — | — |
| 1984 | 81° | 52° | 66° | — | — |
| 1983 | 92° | 71° | 81° | — | — |
| 1982 | 90° | 75° | 82° | 0.05" | — |
| 1981 | 87° | 64° | 76° | — | — |
| 1980 | 90° | 67° | 78° | — | — |
| 1979 | 75° | 50° | 63° | — | — |
| 1978 | 86° | 65° | 75° | — | — |
| 1977 | 90° | 67° | 78° | — | — |
| 1976 | 83° | 59° | 71° | — | — |
| 1974 | 93° | 75° | 84° | — | — |
| 1973 | 89° | 63° | 76° | — | — |
| 1972 | 85° | 62° | 73° | 4.83" | — |
| 1971 | 81° | 56° | 68° | — | — |
54 years of data from JOLIET