Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
59°F
15°C
| Humidity | 23% |
| Wind Speed | SE 9 mph |
| Barometer | 30.22 in (1023.8 mb) |
| Dewpoint | 21°F (-6°C) |
| Visibility | 10.00 mi |
| Last update | 24 Mar 3:54 pm CDT |
Extended Forecast for
2 Miles ENE Harristown IL
Tonight
Low: 40 °F
Mostly Cloudy
Wednesday
High: 72 °F
Mostly Sunny
Wednesday Night
Low: 58 °F
Slight Chance
T-stormsThursday
High: 86 °F
Mostly Sunny
then Chance
T-storms and
BreezyThursday Night
Low: 37 °F
Breezy.
T-storms then
ShowersFriday
High: 48 °F
Decreasing
CloudsFriday Night
Low: 28 °F
Mostly Clear
Saturday
High: 55 °F
Sunny
Saturday Night
Low: 37 °F
Partly Cloudy
Detailed Forecast
Tonight
Mostly cloudy, with a low around 40. South southeast wind 6 to 8 mph.
Wednesday
Mostly sunny, with a high near 72. South southwest wind 7 to 15 mph, with gusts as high as 24 mph.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58. South wind 11 to 14 mph, with gusts as high as 20 mph.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. Breezy, with a southwest wind 11 to 20 mph, with gusts as high as 29 mph.
Thursday Night
Showers and thunderstorms before 10pm, then showers and possibly a thunderstorm between 10pm and 1am, then showers likely after 1am. Low around 37. Breezy, with a west northwest wind 14 to 21 mph becoming north northeast after midnight. Winds could gust as high as 29 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 48. North northeast wind 15 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly clear, with a low around 28. North wind 6 to 10 mph, with gusts as high as 17 mph.
Saturday
Sunny, with a high near 55.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 61.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 76.
Monday Night
A chance of showers. Mostly cloudy, with a low around 54.
Tuesday
A chance of showers. Mostly cloudy, with a high near 73.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT 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)
1:56 pm CDT Mar 24, 2026
4pm CDT Mar 24, 2026-6pm CDT Mar 31, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
