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Joliet, IL Weather on October 12
October 12th in Joliet, IL typically brings mild fall weather, with average highs around 67°F and lows near 44°F. Over 55 years of records, the warmest October 12th was in 1973 (72°F average), while the coldest was 2009 (37°F) — a 35°F range across recorded history. Rain or other precipitation has occurred on about 24% of October 12th dates historically, with the wettest October 12th recording 1" of rain. The last decade has been 2.0°F cooler on this date compared to 20-30 years ago.
What to Expect on October 12
Planning for October 12th in Joliet, IL? Great weather for outdoor activities.
October 12 Weather Records for Joliet
- •The all-time record high for October 12th in Joliet, IL is 83°F, set in 2024.
- •The coldest October 12th on record dropped to 30°F in 2023.
- •A freeze (32°F or below) has occurred on October 12th in 6 of the last 55 years.
Frequently Asked Questions
What was the warmest October 12 ever in Joliet?
The warmest October 12 in Joliet, IL reached 83°F in 2024. That is 16°F above the long-term average high of 67°F.
What was the coldest October 12 ever in Joliet?
The coldest October 12 in Joliet, IL dropped to 30°F in 2023. That is 14°F below the long-term average low of 44°F.
What is the average temperature on October 12 in Joliet?
On October 12, Joliet averages a high of 67°F and a low of 44°F based on 55 years of NOAA weather observations from JOLIET.
How many years of weather data are available for October 12 in Joliet?
We have 55 years of weather records for October 12 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.
October 12 Weather History in Joliet
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 72°F | 46°F | 0" | -- |
| 2024 | 83°F | 49°F | 0" | -- |
| 2023 | 54°F | 30°F | 1" | -- |
| 2022 | 68°F | 51°F | 0.44" | -- |
| 2021 | 76°F | 60°F | 0.74" | -- |
| 2020 | 76°F | 46°F | 0" | -- |
| 2019 | 65°F | 35°F | 0.76" | -- |
| 2018 | 50°F | 33°F | 0" | -- |
| 2017 | 59°F | 56°F | 0" | -- |
| 2016 | 65°F | 45°F | 0.52" | -- |
| 2015 | 78°F | 51°F | 0" | -- |
| 2014 | 59°F | 38°F | 0" | -- |
| 2013 | 76°F | 54°F | 0" | -- |
| 2012 | 64°F | 39°F | 0" | -- |
| 2011 | 79°F | 56°F | 0" | -- |
| 2010 | 82°F | 55°F | 0" | -- |
| 2009 | 43°F | 31°F | 0" | -- |
| 2008 | 81°F | 54°F | 0" | -- |
| 2007 | 55°F | 43°F | 0" | -- |
| 2006 | 56°F | 32°F | 0.05" | -- |
| 2005 | 63°F | 56°F | 0.02" | -- |
| 2004 | 65°F | 47°F | 0" | -- |
| 2003 | 78°F | 47°F | 0.06" | -- |
| 2002 | 78°F | 52°F | 0" | -- |
| 2001 | 65°F | 52°F | 0.72" | -- |
| 2000 | 67°F | 38°F | 0" | -- |
| 1999 | 69°F | 49°F | 0" | -- |
| 1998 | 72°F | 47°F | 0" | -- |
| 1997 | 79°F | 49°F | 0" | -- |
| 1996 | 59°F | 33°F | 0" | -- |
| 1995 | 79°F | 45°F | 0" | -- |
| 1994 | 63°F | 37°F | 0" | -- |
| 1993 | 58°F | 36°F | 0" | -- |
| 1992 | 64°F | 43°F | 0" | -- |
| 1991 | 63°F | 41°F | 0" | -- |
| 1990 | 63°F | 35°F | 0" | -- |
| 1989 | 78°F | 40°F | 0" | -- |
| 1988 | 53°F | 31°F | 0" | -- |
| 1987 | 50°F | 30°F | 0" | -- |
| 1986 | 72°F | 45°F | 0.06" | -- |
| 1985 | 65°F | 44°F | 0.06" | -- |
| 1984 | 72°F | 56°F | 0" | -- |
| 1983 | 75°F | 48°F | 0.42" | -- |
| 1982 | 69°F | 44°F | 0" | -- |
| 1981 | 64°F | 42°F | 0" | -- |
| 1980 | 58°F | 33°F | 0" | -- |
| 1979 | 59°F | 43°F | 0" | -- |
| 1978 | 64°F | 48°F | 0" | -- |
| 1977 | 48°F | 31°F | 0" | -- |
| 1976 | 72°F | 42°F | 0" | -- |
| 1975 | 72°F | 42°F | 0" | -- |
| 1974 | 76°F | 53°F | 0" | -- |
| 1973 | 81°F | 64°F | 0" | -- |
| 1972 | 70°F | 53°F | 0.12" | -- |
| 1971 | 70°F | 35°F | 0" | -- |
Based on 55 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.