Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Overcast
29°F
-2°C
| Humidity | 72% |
| Wind Speed | S 17 mph |
| Barometer | 29.90 in (1013.6 mb) |
| Dewpoint | 21°F (-6°C) |
| Visibility | 10.00 mi |
| Wind Chill | 17°F (-8°C) |
| Last update | 5 Feb 6:54 pm CST |
Extended Forecast for
2 Miles ENE Harristown IL
Tonight

Low: 24 °F
Decreasing
CloudsFriday

High: 39 °F
Mostly Cloudy
Friday Night

Low: 14 °F
Decreasing
CloudsSaturday

High: 27 °F
Sunny
Saturday Night

Low: 20 °F
Mostly Cloudy
Sunday

High: 39 °F
Decreasing
CloudsSunday Night

Low: 24 °F
Partly Cloudy
Monday

High: 48 °F
Sunny
Monday Night

Low: 33 °F
Mostly Clear
Detailed Forecast
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 24. West southwest wind 7 to 9 mph, with gusts as high as 16 mph.
Friday
Mostly cloudy, with a high near 39. West southwest wind 8 to 18 mph becoming north northwest in the morning. Winds could gust as high as 30 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 14. Wind chill values between 3 and 8. North wind 9 to 15 mph, with gusts as high as 23 mph.
Saturday
Sunny, with a high near 27. Wind chill values between 3 and 13. North northeast wind 5 to 8 mph becoming southeast in the afternoon.
Saturday Night
Mostly cloudy, with a low around 20. South southeast wind 6 to 11 mph, with gusts as high as 17 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 39. South southeast wind 8 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Partly cloudy, with a low around 24. Southeast wind around 7 mph.
Monday
Sunny, with a high near 48.
Monday Night
Mostly clear, with a low around 33.
Tuesday
Mostly sunny, with a high near 58.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 37.
Wednesday
A chance of rain. Cloudy, with a high near 49.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 32.
Thursday
A chance of rain. Mostly cloudy, with a high near 44.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
2 Miles ENE Harristown IL
39.84°N 89.03°W (Elev. 666 ft)
39.84°N 89.03°W (Elev. 666 ft)
6:37 pm CST Feb 5, 2026
7pm CST Feb 5, 2026-6pm CST Feb 12, 2026


