Illiopolis Weather in April
Average highs run from 58°F on April 1 to 68°F on April 30, and lows from 38°F to 49°F. Normal precipitation for the month is 4.12 in over about 11 wet days.
April day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
April at a glance
- Average high
- 63°F
- Average low
- 43°F
- Precipitation
- 4.12 in
- Snowfall
- 0.4 in
- Record high
- 88°FApr 30, 2007
- Record low
- 12°FApr 2, 2018
- Chance of a freeze
- 90%
- Daylight
- 12 h 40 min to 13 h 53 min
- Cloud cover
- 65%
- Humidity
- 75%
- Dew point
- 44°F
- Wind
- 12.8 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.
| Date | Normal high | Normal low | Record high | Record low | Chance wet | Chance of snow |
|---|---|---|---|---|---|---|
| Apr 1 | 58°F | 38°F | 86°F 2012 | 21°F 2018 | 35% | 2% |
| Apr 2 | 58°F | 38°F | 81°F 2012 | 12°F 2018 | 35% | 1% |
| Apr 3 | 59°F | 39°F | 87°F 2012 | 25°F 2013 | 35% | 1% |
| Apr 4 | 59°F | 39°F | 84°F 2023 | 24°F 2018 | 35% | 1% |
| Apr 5 | 60°F | 39°F | 79°F 2023 | 22°F 2016 | 36% | 1% |
| Apr 6 | 60°F | 40°F | 82°F 2010 | 24°F 2002 | 36% | 1% |
| Apr 7 | 60°F | 40°F | 80°F 2001 | 21°F 2007 | 36% | 1% |
| Apr 8 | 61°F | 41°F | 84°F 2020 | 23°F 2018 | 36% | 1% |
| Apr 9 | 61°F | 41°F | 84°F 2001 | 25°F 2007 | 37% | 1% |
| Apr 10 | 62°F | 41°F | 84°F 2011 | 25°F 2007 | 37% | 1% |
| Apr 11 | 62°F | 42°F | 78°F 2010 | 27°F 2012 | 37% | 1% |
| Apr 12 | 62°F | 42°F | 80°F 2006 | 28°F 2009 | 37% | 1% |
| Apr 13 | 63°F | 42°F | 85°F 2006 | 29°F 2003 | 38% | 1% |
| Apr 14 | 63°F | 43°F | 87°F 2006 | 28°F 2008 | 38% | 1% |
| Apr 15 | 63°F | 43°F | 85°F 2002 | 25°F 2020 | 38% | 1% |
| Apr 16 | 64°F | 44°F | 86°F 2002 | 25°F 2020 | 38% | 1% |
| Apr 17 | 64°F | 44°F | 86°F 2004 | 30°F 2001 | 39% | 1% |
| Apr 18 | 65°F | 44°F | 86°F 2002 | 28°F 2001 | 39% | 1% |
| Apr 19 | 65°F | 45°F | 84°F 2002 | 31°F 2022 | 39% | 0% |
| Apr 20 | 65°F | 45°F | 82°F 2005 | 26°F 2018 | 40% | 0% |
| Apr 21 | 66°F | 45°F | 78°F 2001 | 29°F 2021 | 40% | 0% |
| Apr 22 | 66°F | 46°F | 82°F 2001 | 32°F 2021 | 40% | 0% |
| Apr 23 | 66°F | 46°F | 83°F 2022 | 31°F 2003 | 40% | 0% |
| Apr 24 | 67°F | 46°F | 83°F 2025 | 29°F 2023 | 41% | 0% |
| Apr 25 | 67°F | 47°F | 82°F 2009 | 31°F 2024 | 41% | 0% |
| Apr 26 | 67°F | 47°F | 83°F 2009 | 32°F 2018 | 41% | 0% |
| Apr 27 | 68°F | 48°F | 83°F 2021 | 34°F 2022 | 41% | 0% |
| Apr 28 | 68°F | 48°F | 85°F 2025 | 33°F 2010 | 41% | 0% |
| Apr 29 | 68°F | 48°F | 84°F 2007 | 25°F 2018 | 42% | 0% |
| Apr 30 | 68°F | 49°F | 88°F 2007 | 32°F 2018 | 42% | 0% |
Chance of rain
- Chance of a wet day
- Chance of snowfall
Sunrise and sunset
Times for 2026, local time (CDT).
- April 1
- sunrise 6:41 AM, sunset 7:21 PM
- April 30
- sunrise 5:58 AM, sunset 7:51 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00112193 (Decatur Wtp), public domain. Records: NOAA GHCN-Daily, station USW00003887, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.