Michael D Beckwith / CC BY 2.0
Joliet, IL Weather on August 26
August 26th 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 August 26th was in 1973 (83°F average), while the coldest was 2017 (59°F) — a 24°F range across recorded history. Rain or other precipitation has occurred on about 30% of August 26th dates historically, with the wettest August 26th recording 2.6" of rain. The last decade has been 1.4°F cooler on this date compared to 20-30 years ago.
What to Expect on August 26
Planning for August 26th in Joliet, IL? Stay hydrated and seek shade during peak afternoon hours. Consider bringing rain gear or an umbrella.
August 26 Weather Records for Joliet
- •The all-time record high for August 26th in Joliet, IL is 95°F, set in 1991.
- •The coldest August 26th on record dropped to 47°F in 2017.
- •Temperatures have reached 90°F or higher on August 26th in 8 of the last 53 years.
Frequently Asked Questions
What was the warmest August 26 ever in Joliet?
The warmest August 26 in Joliet, IL reached 95°F in 1991. That is 12°F above the long-term average high of 83°F.
What was the coldest August 26 ever in Joliet?
The coldest August 26 in Joliet, IL dropped to 47°F in 2017. That is 16°F below the long-term average low of 63°F.
What is the average temperature on August 26 in Joliet?
On August 26, Joliet averages a high of 83°F and a low of 63°F based on 53 years of NOAA weather observations from JOLIET.
How many years of weather data are available for August 26 in Joliet?
We have 53 years of weather records for August 26 in Joliet, IL, sourced from NOAA's Global Historical Climatology Network. Records include daily high and low temperatures, precipitation, and snowfall data going back to 2025.
August 26 Weather History in Joliet
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 74°F | 49°F | 0" | -- |
| 2024 | 90°F | 70°F | 0" | -- |
| 2023 | 84°F | 66°F | 0" | -- |
| 2022 | 79°F | 64°F | 0.13" | -- |
| 2021 | 92°F | -- | 1.15" | -- |
| 2020 | 94°F | 71°F | 0" | -- |
| 2019 | 76°F | 59°F | -- | -- |
| 2018 | 85°F | 66°F | 0" | -- |
| 2017 | 72°F | 47°F | 0" | -- |
| 2016 | 83°F | 66°F | 0" | -- |
| 2015 | 70°F | 55°F | 0" | -- |
| 2014 | 80°F | 69°F | 1.1" | -- |
| 2013 | 86°F | 61°F | 0" | -- |
| 2012 | 91°F | 65°F | 0" | -- |
| 2011 | 81°F | 60°F | 0" | -- |
| 2010 | 79°F | 59°F | 0" | -- |
| 2009 | 80°F | 59°F | 0" | -- |
| 2008 | 75°F | 59°F | 0" | -- |
| 2007 | 80°F | 60°F | 0.05" | -- |
| 2006 | 82°F | 65°F | 0" | -- |
| 2005 | 78°F | 64°F | 0" | -- |
| 2004 | 75°F | 67°F | 1.06" | -- |
| 2003 | 91°F | 70°F | 0.09" | -- |
| 2002 | 85°F | 70°F | 0" | -- |
| 2001 | 82°F | 70°F | 0.2" | -- |
| 2000 | 84°F | 61°F | 0" | -- |
| 1999 | 75°F | 62°F | 0.07" | -- |
| 1998 | 87°F | 64°F | 0" | -- |
| 1997 | 75°F | 61°F | 0" | -- |
| 1996 | 83°F | 60°F | 0" | -- |
| 1995 | 86°F | 67°F | 0" | -- |
| 1994 | 87°F | 67°F | 0" | -- |
| 1993 | 87°F | 70°F | 0.01" | -- |
| 1992 | 89°F | 69°F | 0.57" | -- |
| 1991 | 95°F | 69°F | 0" | -- |
| 1990 | 83°F | 66°F | 0" | -- |
| 1989 | 80°F | 63°F | 0" | -- |
| 1988 | 83°F | 54°F | 0" | -- |
| 1986 | 86°F | 56°F | 0.35" | -- |
| 1985 | 70°F | 53°F | 0.13" | -- |
| 1984 | 84°F | 56°F | 0" | -- |
| 1983 | 86°F | 68°F | 0.04" | -- |
| 1982 | 78°F | 52°F | 0" | -- |
| 1981 | 81°F | 66°F | 0.43" | -- |
| 1980 | 85°F | 61°F | 0" | -- |
| 1979 | 81°F | 61°F | 0" | -- |
| 1978 | 82°F | 63°F | 0" | -- |
| 1977 | 78°F | 55°F | 0" | -- |
| 1976 | 83°F | 67°F | 0.15" | -- |
| 1974 | 94°F | 66°F | 0" | -- |
| 1973 | 95°F | 71°F | 0" | -- |
| 1972 | 81°F | 66°F | 2.6" | -- |
| 1971 | 87°F | 57°F | 0" | -- |
Based on 53 years of data from NOAA station: JOLIET
Monthly Climate Averages
Historical temperature and precipitation averages for Joliet, IL, based on 55+ years of weather data.
Temperatures in Fahrenheit. Precipitation and snowfall in inches.