Weather on July 15
Joliet, IL
55 Years of Data
Avg High
85°F
Avg Low
64°F
Warmest
1995
90°F avg
Coldest
1989
60°F avg
About This Date
July 15th in Joliet, IL typically brings warm summer weather, with average highs around 85°F and lows near 64°F. Over 54 years of records, the warmest July 15th was in 1995 (90°F average), while the coldest was 1989 (60°F) — a 30°F range across recorded history. Rain or other precipitation has occurred on about 35% of July 15th dates historically, with the wettest July 15th recording 4.06" 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 July 15th in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
Cooling Trend
0.7°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 91° | 66° | 79° | — | — |
| 2024 | 88° | 50° | 69° | 4.06" | — |
| 2023 | 88° | 68° | 78° | 0.46" | — |
| 2022 | 70° | 64° | 67° | 2.44" | — |
| 2021 | 82° | 65° | 73° | 0.61" | — |
| 2020 | 85° | 64° | 74° | — | — |
| 2019 | 91° | 55° | 73° | — | — |
| 2018 | 83° | 71° | 77° | — | — |
| 2017 | — | 58° | — | — | — |
| 2016 | 85° | 64° | 74° | — | — |
| 2015 | 83° | 59° | 71° | — | — |
| 2014 | 79° | 53° | 66° | 0.03" | — |
| 2013 | 89° | 70° | 79° | — | — |
| 2012 | 90° | 69° | 79° | — | — |
| 2011 | 82° | 64° | 73° | — | — |
| 2010 | 89° | 72° | 80° | — | — |
| 2009 | 78° | 58° | 68° | 0.74" | — |
| 2008 | 83° | 60° | 71° | — | — |
| 2007 | 85° | 62° | 73° | — | — |
| 2006 | 86° | 67° | 76° | 0.13" | — |
| 2005 | 89° | 57° | 73° | — | — |
| 2004 | 80° | 62° | 71° | — | — |
| 2003 | 84° | 62° | 73° | 2.92" | — |
| 2002 | 88° | 60° | 74° | — | — |
| 2001 | 89° | 62° | 76° | — | — |
| 2000 | 73° | 68° | 71° | — | — |
| 1999 | 84° | 63° | 73° | — | — |
| 1998 | 88° | 67° | 77° | — | — |
| 1997 | 92° | 65° | 78° | — | — |
| 1996 | 74° | 60° | 67° | 0.05" | — |
| 1995warmest | 101° | 79° | 90° | — | — |
| 1994 | 83° | 65° | 74° | — | — |
| 1993 | 79° | 66° | 72° | 0.03" | — |
| 1992 | 73° | 61° | 67° | 1.02" | — |
| 1991 | 85° | 64° | 74° | — | — |
| 1990 | 69° | 59° | 64° | — | — |
| 1989coldest | 69° | 52° | 60° | — | — |
| 1988 | 100° | 70° | 85° | — | — |
| 1987 | 77° | 59° | 68° | 0.71" | — |
| 1986 | 85° | 64° | 74° | — | — |
| 1985 | 87° | 65° | 76° | 0.1" | — |
| 1984 | 91° | 64° | 78° | 0.08" | — |
| 1983 | 93° | 71° | 82° | — | — |
| 1982 | 84° | 66° | 75° | 1.78" | — |
| 1981 | 84° | 68° | 76° | 0.08" | — |
| 1980 | 93° | 68° | 81° | — | — |
| 1979 | 76° | 67° | 71° | 1.09" | — |
| 1978 | 86° | 63° | 74° | — | — |
| 1977 | 97° | 76° | 86° | — | — |
| 1976 | 101° | 72° | 86° | 0.3" | — |
| 1974 | 91° | 71° | 81° | — | — |
| 1973 | 79° | 55° | 67° | — | — |
| 1972 | 88° | 69° | 78° | 3.48" | — |
| 1971 | 83° | 61° | 72° | — | — |
54 years of data from JOLIET