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Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
68°F
20°C
| Humidity | 45% |
| Wind Speed | S 12 mph |
| Barometer | 30.15 in (1020.9 mb) |
| Dewpoint | 46°F (8°C) |
| Visibility | 10.00 mi |
| Last update | 6 Oct 10:54 am CDT |
Extended Forecast for
3 Miles SSW Illiopolis IL
Today
High: 77 °F
Sunny
Tonight
Low: 55 °F
Mostly Clear
Wednesday
High: 84 °F
Sunny
Wednesday Night
Low: 52 °F
Mostly Clear
Thursday
High: 77 °F
Sunny
Thursday Night
Low: 48 °F
Mostly Clear
Friday
High: 79 °F
Sunny
Friday Night
Low: 53 °F
Mostly Clear
Saturday
High: 84 °F
Sunny
Detailed Forecast
Today
Sunny, with a high near 77. South wind around 10 mph, with gusts as high as 17 mph.
Tonight
Mostly clear, with a low around 55. South wind 6 to 8 mph, with gusts as high as 15 mph.
Wednesday
Sunny, with a high near 84. Southwest wind 7 to 10 mph, with gusts as high as 15 mph.
Wednesday Night
Mostly clear, with a low around 52. Northwest wind around 6 mph becoming calm in the evening.
Thursday
Sunny, with a high near 77. Calm wind becoming north northwest 5 to 8 mph in the morning.
Thursday Night
Mostly clear, with a low around 48. North wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 79. Calm wind becoming southeast around 6 mph in the morning.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Mostly clear, with a low around 58.
Columbus Day
Sunny, with a high near 84.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles SSW Illiopolis IL
39.81°N 89.29°W (Elev. 597 ft)
39.81°N 89.29°W (Elev. 597 ft)
10:36 am CDT Oct 6, 2026
11am CDT Oct 6, 2026-6pm CDT Oct 12, 2026
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