Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
46°F
8°C
| Humidity | 77% |
| Wind Speed | S 12 mph |
| Barometer | 29.97 in (1015.0 mb) |
| Dewpoint | 39°F (4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 40°F (4°C) |
| Last update | 17 Feb 1:54 am CST |
Extended Forecast for
2 Miles ENE Harristown IL
Overnight
Low: 41 °F
Partly Cloudy
Tuesday
High: 59 °F
Mostly Cloudy
then Slight
Chance
ShowersTuesday Night
Low: 53 °F
Chance
Showers and
BreezyWednesday
High: 67 °F
Sunny
Wednesday Night
Low: 45 °F
Partly Cloudy
then Chance
RainThursday
High: 67 °F
Partly Sunny
then Chance
T-stormsThursday Night
Low: 34 °F
Chance
Showers then
Mostly Clear
and BreezyFriday
High: 45 °F
Sunny and
BreezyFriday Night
Low: 27 °F
Mostly Clear
Detailed Forecast
Overnight
Partly cloudy, with a low around 41. South wind around 9 mph, with gusts as high as 17 mph.
Tuesday
A 20 percent chance of showers after 5pm. Cloudy, with a high near 59. South wind 8 to 17 mph, with gusts as high as 34 mph.
Tuesday Night
A 40 percent chance of showers, mainly between 9pm and 3am. Cloudy, then gradually becoming partly cloudy, with a low around 53. Breezy, with a south wind 18 to 22 mph, with gusts as high as 40 mph.
Wednesday
Sunny, with a high near 67. West southwest wind 10 to 18 mph, with gusts as high as 28 mph.
Wednesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 45. South southeast wind around 8 mph.
Thursday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 67. South southeast wind 9 to 17 mph, with gusts as high as 25 mph.
Thursday Night
A 40 percent chance of showers before midnight. Mostly clear, with a low around 34. Breezy, with a west wind 14 to 20 mph, with gusts as high as 26 mph.
Friday
Sunny, with a high near 45. Breezy.
Friday Night
Mostly clear, with a low around 27.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 17.
Monday
Sunny, with a high near 36.
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)
2:37 am CST Feb 17, 2026
2am CST Feb 17, 2026-6pm CST Feb 23, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
