Weather on July 31
Joliet, IL
55 Years of Data
Avg High
83°F
Avg Low
63°F
Warmest
1999
90°F avg
Coldest
1992
61°F avg
About This Date
July 31st in Joliet, IL typically brings warm summer weather, with average highs around 83°F and lows near 63°F. Over 53 years of records, the warmest July 31st was in 1999 (90°F average), while the coldest was 1992 (61°F) — a 29°F range across recorded history. Rain or other precipitation has occurred on about 28% of July 31st dates historically, with the wettest July 31st recording 5.66" of rain. The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
Planning for July 31st in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 78° | 69° | 74° | — | — |
| 2024 | 88° | 69° | 78° | — | — |
| 2023 | 81° | 61° | 71° | — | — |
| 2022 | 82° | 60° | 71° | — | — |
| 2021 | 75° | 65° | 70° | — | — |
| 2020 | 87° | 65° | 76° | — | — |
| 2019 | 83° | 60° | 71° | — | — |
| 2018 | 79° | 60° | 69° | — | — |
| 2017 | 83° | 59° | 71° | — | — |
| 2016 | 79° | 64° | 71° | — | — |
| 2015 | 86° | 65° | 75° | — | — |
| 2014 | 79° | 59° | 69° | — | — |
| 2013 | 72° | 60° | 66° | 0.13" | — |
| 2012 | 92° | 66° | 79° | 1.35" | — |
| 2011 | 89° | 68° | 79° | — | — |
| 2010 | 77° | 66° | 72° | 1.07" | — |
| 2009 | 79° | 59° | 69° | 0.58" | — |
| 2008 | 86° | 69° | 78° | 2.72" | — |
| 2007 | 87° | 65° | 76° | — | — |
| 2006 | 92° | 76° | 84° | — | — |
| 2005 | 84° | 63° | 73° | — | — |
| 2004 | 77° | 65° | 71° | 0.36" | — |
| 2003 | 81° | 57° | 69° | — | — |
| 2002 | 91° | 68° | 80° | — | — |
| 2001 | 92° | 63° | 77° | — | — |
| 2000 | 75° | 63° | 69° | 4.06" | — |
| 1999warmest | 101° | 79° | 90° | — | — |
| 1998 | 79° | 68° | 73° | — | — |
| 1997 | 80° | 58° | 69° | — | — |
| 1996 | 75° | 58° | 66° | — | — |
| 1995 | 92° | 70° | 81° | — | — |
| 1994 | 81° | 58° | 69° | — | — |
| 1993 | 82° | 63° | 72° | — | — |
| 1992coldest | 65° | 57° | 61° | 2.49" | — |
| 1991 | 89° | 59° | 74° | — | — |
| 1990 | 82° | 58° | 70° | — | — |
| 1989 | 82° | 69° | 76° | — | — |
| 1988 | 96° | 67° | 81° | 0.71" | — |
| 1987 | 91° | 70° | 80° | 1.4" | — |
| 1986 | 88° | 63° | 75° | — | — |
| 1985 | 75° | 65° | 70° | 1.8" | — |
| 1984 | 83° | 55° | 69° | — | — |
| 1983 | 90° | 70° | 80° | 0.69" | — |
| 1982 | 81° | 58° | 69° | — | — |
| 1981 | 78° | 58° | 68° | — | — |
| 1980 | 84° | 61° | 72° | 0.15" | — |
| 1979 | 89° | 67° | 78° | 5.66" | — |
| 1978 | 71° | 55° | 63° | — | — |
| 1977 | 89° | 62° | 76° | 0.64" | — |
| 1976 | 87° | 65° | 76° | — | — |
| 1974 | 83° | 56° | 69° | — | — |
| 1973 | 81° | 66° | 73° | — | — |
| 1971 | 78° | 50° | 64° | — | — |
53 years of data from JOLIET