Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Mostly Cloudy
62°F
17°C
| Humidity | 78% |
| Wind Speed | SW 7 mph |
| Barometer | 30.15 in (1020.6 mb) |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 28 Aug 7:54 am CDT |
Extended Forecast for
Illiopolis IL
Today
High: 82 °F
Sunny
Tonight
Low: 58 °F
Mostly Clear
Friday
High: 79 °F
Sunny
Friday Night
Low: 54 °F
Partly Cloudy
Saturday
High: 79 °F
Sunny
Saturday Night
Low: 56 °F
Partly Cloudy
Sunday
High: 79 °F
Mostly Sunny
Sunday Night
Low: 56 °F
Partly Cloudy
Labor Day
High: 80 °F
Mostly Sunny
Detailed Forecast
Today
Sunny, with a high near 82. West wind 6 to 9 mph.
Tonight
Mostly clear, with a low around 58. Calm wind becoming northeast around 5 mph after midnight.
Friday
Sunny, with a high near 79. East wind around 6 mph.
Friday Night
Partly cloudy, with a low around 54. East northeast wind around 6 mph.
Saturday
Sunny, with a high near 79. East northeast wind around 7 mph.
Saturday Night
Partly cloudy, with a low around 56. East wind around 6 mph.
Sunday
Mostly sunny, with a high near 79. East wind 6 to 8 mph.
Sunday Night
Partly cloudy, with a low around 56.
Labor Day
Mostly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 82.
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)
7:39 am CDT Aug 28, 2025
8am CDT Aug 28, 2025-6pm CDT Sep 3, 2025
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