Weather on August 31
Joliet, IL
55 Years of Data
About This Date
August 31st in Joliet, IL typically brings warm summer weather, with average highs around 81°F and lows near 61°F. Over 53 years of records, the warmest August 31st was in 1995 (81°F average), while the coldest was 2009 (57°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 23% of August 31st dates historically, with the wettest August 31st recording 5.84" of rain. The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
The last decade has been 1.7°F cooler on this date compared to 20-30 years ago.
Planning for August 31st in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours.
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 75° | 56° | 65° | — | — |
| 2024 | 85° | 62° | 73° | — | — |
| 2023 | 72° | 52° | 62° | — | — |
| 2022 | 78° | 57° | 68° | — | — |
| 2021 | 84° | 65° | 74° | — | — |
| 2020 | 79° | 60° | 69° | — | — |
| 2019 | 80° | — | — | — | — |
| 2018 | 74° | 60° | 67° | — | — |
| 2017 | 79° | 59° | 69° | — | — |
| 2016 | 82° | 68° | 75° | 0.76" | — |
| 2015 | 79° | 63° | 71° | — | — |
| 2014 | 83° | 66° | 74° | — | — |
| 2013 | 95° | 65° | 80° | 1.09" | — |
| 2012 | 89° | 63° | 76° | — | — |
| 2011 | 84° | 60° | 72° | 0.33" | — |
| 2010 | 85° | 68° | 76° | 0.05" | — |
| 2009coldest | 67° | 47° | 57° | — | — |
| 2008 | 86° | 57° | 72° | — | — |
| 2007 | 75° | 55° | 65° | — | — |
| 2006 | 75° | 63° | 69° | 0.03" | — |
| 2005 | 82° | 63° | 72° | — | — |
| 2004 | 83° | 54° | 68° | — | — |
| 2003 | 74° | 64° | 69° | — | — |
| 2002 | 84° | 65° | 74° | — | — |
| 2001 | 84° | 68° | 76° | 1.91" | — |
| 2000 | 90° | 65° | 77° | — | — |
| 1999 | 73° | 55° | 64° | — | — |
| 1998 | 81° | 59° | 70° | — | — |
| 1997 | 74° | 60° | 67° | — | — |
| 1996 | 83° | 59° | 71° | — | — |
| 1995warmest | 90° | 73° | 81° | — | — |
| 1994 | 65° | 58° | 61° | 1.98" | — |
| 1993 | 72° | 68° | 70° | 1.52" | — |
| 1992 | 74° | 52° | 63° | — | — |
| 1991 | 83° | 61° | 72° | — | — |
| 1990 | 81° | 59° | 70° | — | — |
| 1989 | 83° | 57° | 70° | 4.45" | — |
| 1988 | 77° | 53° | 65° | — | — |
| 1986 | 78° | 56° | 67° | — | — |
| 1985 | 76° | 56° | 66° | — | — |
| 1984 | 85° | 52° | 68° | — | — |
| 1983 | 82° | 66° | 74° | — | — |
| 1982 | 82° | 62° | 72° | 0.15" | — |
| 1981 | 84° | 64° | 74° | 0.08" | — |
| 1980 | 87° | 64° | 76° | 5.84" | — |
| 1979 | 87° | 63° | 75° | — | — |
| 1978 | 82° | 53° | 68° | — | — |
| 1977 | 83° | 61° | 72° | — | — |
| 1976 | 78° | 54° | 66° | — | — |
| 1974 | 84° | 63° | 73° | — | — |
| 1973 | 91° | 69° | 80° | — | — |
| 1972 | 90° | 68° | 79° | — | — |
| 1971 | 86° | 62° | 74° | — | — |
Joliet, IL Temperature Range by Month
Average monthly highs and lows. The shaded band shows the typical daily temperature range.
Joliet, IL Monthly Precipitation
Average rainfall and snowfall per month, in inches.
Joliet, IL Daily Temperature Calendar
Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.
Best Time to Visit Joliet, IL
Joliet, IL has no months that meet our "pleasant" threshold — every season has tradeoffs.