Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
63°F
17°C
| Humidity | 73% |
| Wind Speed | NE 5 mph |
| Barometer | 30.16 in (1020.6 mb) |
| Dewpoint | 54°F (12°C) |
| Visibility | 10.00 mi |
| Last update | 30 Sep 3:54 am CDT |
Extended Forecast for
Illiopolis IL
Today
High: 88 °F
Sunny
Tonight
Low: 56 °F
Partly Cloudy
Wednesday
High: 86 °F
Partly Sunny
Wednesday Night
Low: 59 °F
Mostly Cloudy
Thursday
High: 87 °F
Mostly Sunny
Thursday Night
Low: 60 °F
Mostly Clear
Friday
High: 88 °F
Sunny
Friday Night
Low: 60 °F
Clear
Saturday
High: 86 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 88. Northeast wind 5 to 10 mph.
Tonight
Partly cloudy, with a low around 56. East northeast wind around 7 mph.
Wednesday
Partly sunny, with a high near 86. East southeast wind around 7 mph.
Wednesday Night
Mostly cloudy, with a low around 59. East southeast wind around 6 mph.
Thursday
Mostly sunny, with a high near 87. South southeast wind around 7 mph.
Thursday Night
Mostly clear, with a low around 60. Southeast wind 3 to 6 mph.
Friday
Sunny, with a high near 88. South southwest wind 3 to 8 mph.
Friday Night
Clear, with a low around 60.
Saturday
Sunny, with a high near 86.
Saturday Night
Mostly clear, with a low around 59.
Sunday
Sunny, with a high near 86.
Sunday Night
Mostly clear, with a low around 62.
Monday
Sunny, with a high near 85.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Illiopolis IL
39.85°N 89.26°W (Elev. 607 ft)
39.85°N 89.26°W (Elev. 607 ft)
4:24 am CDT Sep 30, 2025
4am CDT Sep 30, 2025-6pm CDT Oct 6, 2025
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