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Joliet, IL Weather on April 12
April 12th in Joliet, IL typically brings mild spring weather, with average highs around 60°F and lows near 39°F. Over 54 years of records, the warmest April 12th was in 1971 (72°F average), while the coldest was 1990 (33°F) — a 39°F range across recorded history. Rain or other precipitation has occurred on about 39% of April 12th dates historically, with the wettest April 12th recording 5.59" of rain. The last decade has been 1.5°F cooler on this date compared to 20-30 years ago.
What to Expect on April 12
Planning for April 12th in Joliet, IL? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
April 12 Weather Records for Joliet
- •The all-time record high for April 12th in Joliet, IL is 85°F, set in 1971.
- •The coldest April 12th on record dropped to 25°F in 1990.
- •A freeze (32°F or below) has occurred on April 12th in 13 of the last 54 years.
- •Last year (1971), April 12th was 25°F warmer than the long-term average.
Frequently Asked Questions
What was the warmest April 12 ever in Joliet?
The warmest April 12 in Joliet, IL reached 85°F in 1971. That is 25°F above the long-term average high of 60°F.
What was the coldest April 12 ever in Joliet?
The coldest April 12 in Joliet, IL dropped to 25°F in 1990. That is 14°F below the long-term average low of 39°F.
What is the average temperature on April 12 in Joliet?
On April 12, Joliet averages a high of 60°F and a low of 39°F based on 54 years of NOAA weather observations from JOLIET.
How many years of weather data are available for April 12 in Joliet?
We have 54 years of weather records for April 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.
April 12 Weather History in Joliet
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 63°F | 30°F | 0" | -- |
| 2024 | 59°F | 47°F | 0.03" | -- |
| 2023 | 78°F | 42°F | 0" | -- |
| 2022 | 62°F | 38°F | 0" | -- |
| 2021 | 56°F | 44°F | 0.05" | -- |
| 2020 | 65°F | 44°F | 1.07" | -- |
| 2019 | 73°F | 39°F | 0.69" | -- |
| 2018 | 67°F | 37°F | 0" | -- |
| 2017 | 53°F | 36°F | 0" | -- |
| 2016 | 50°F | 29°F | 0" | -- |
| 2015 | 63°F | 36°F | 0" | -- |
| 2014 | 70°F | 38°F | 0" | -- |
| 2013 | 52°F | 37°F | 0.13" | -- |
| 2012 | 54°F | 30°F | 0" | -- |
| 2011 | 64°F | 41°F | 0" | -- |
| 2010 | 70°F | 45°F | 0" | -- |
| 2009 | 50°F | 31°F | 0" | -- |
| 2008 | 62°F | 38°F | 0.2" | -- |
| 2007 | 42°F | 33°F | 1.96" | -- |
| 2006 | 75°F | 40°F | 0.23" | -- |
| 2005 | 78°F | 50°F | 0.15" | -- |
| 2004 | 48°F | 32°F | 0" | -- |
| 2003 | 78°F | 44°F | 0" | -- |
| 2002 | 69°F | 60°F | 0" | -- |
| 2001 | 77°F | 47°F | 0.84" | -- |
| 2000 | 43°F | 30°F | 0" | -- |
| 1999 | 51°F | 37°F | 0" | -- |
| 1998 | 65°F | 37°F | 0" | -- |
| 1997 | 38°F | 32°F | 1.78" | -- |
| 1996 | 78°F | 44°F | 0" | -- |
| 1995 | 61°F | 33°F | 1.88" | -- |
| 1994 | 51°F | 41°F | 3.02" | -- |
| 1993 | 54°F | 38°F | 0" | -- |
| 1992 | 57°F | 38°F | 0" | -- |
| 1991 | 47°F | 35°F | 0.13" | -- |
| 1990 | 42°F | 25°F | 0" | -- |
| 1989 | 50°F | 29°F | 0.08" | -- |
| 1988 | 59°F | 41°F | 0" | -- |
| 1987 | 59°F | 42°F | 1.14" | -- |
| 1986 | 71°F | 34°F | 0" | -- |
| 1985 | 60°F | 40°F | 0" | -- |
| 1984 | 65°F | 37°F | 0" | -- |
| 1983 | 47°F | 36°F | 0" | -- |
| 1982 | 46°F | 29°F | 0" | -- |
| 1981 | 70°F | 44°F | 1.98" | -- |
| 1980 | 42°F | 31°F | 0.86" | -- |
| 1979 | 60°F | 36°F | 5.59" | -- |
| 1978 | 59°F | 41°F | 0" | -- |
| 1977 | 83°F | 56°F | 0" | -- |
| 1976 | 44°F | 26°F | 0" | -- |
| 1974 | 73°F | 54°F | -- | -- |
| 1973 | 48°F | 32°F | 1.14" | -- |
| 1972 | 64°F | 42°F | 0.3" | -- |
| 1971 | 85°F | 60°F | 0" | -- |
Based on 54 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.