Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair
23°F
-5°C
| Humidity | 60% |
| Wind Speed | W 9 mph |
| Barometer | 30.24 in (1024.8 mb) |
| Dewpoint | 11°F (-12°C) |
| Visibility | 10.00 mi |
| Wind Chill | 13°F (-11°C) |
| Last update | 22 Jan 1:54 am CST |
Extended Forecast for
2 Miles ENE Harristown IL
Cold Weather Advisory January 23, 03:00am until January 24, 12:00pm
Overnight

Low: 19 °F
Clear
Thursday

High: 33 °F
Increasing
CloudsThursday Night

Low: 0 °F
Mostly Cloudy
Friday

High: 7 °F
Cold
Friday Night

Low: 0 °F
Mostly Cloudy
Saturday
High: 11 °F
Cloudy then
Snow LikelySaturday Night

Low: 7 °F
Snow
Sunday

High: 15 °F
Chance Snow
Sunday Night

Low: -2 °F
Mostly Cloudy
Detailed Forecast
Overnight
Clear, with a low around 19. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.
Thursday
Increasing clouds, with a high near 33. West wind 8 to 14 mph, with gusts as high as 22 mph.
Thursday Night
Mostly cloudy, with a low around 0. Wind chill values between -3 and -13. West wind 7 to 12 mph becoming north northwest 13 to 18 mph after midnight. Winds could gust as high as 30 mph.
Friday
Partly sunny and cold, with a high near 7. Wind chill values between -11 and -21. North northwest wind 13 to 18 mph, with gusts as high as 26 mph.
Friday Night
Mostly cloudy, with a low around 0. Northeast wind around 11 mph, with gusts as high as 17 mph.
Saturday
Snow likely after noon. Cloudy, with a high near 11. East northeast wind around 10 mph, with gusts as high as 17 mph. Chance of precipitation is 60%.
Saturday Night
Snow. Low around 7. North northeast wind around 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%.
Sunday
A 40 percent chance of snow. Mostly cloudy, with a high near 15.
Sunday Night
Mostly cloudy, with a low around -2.
Monday
Sunny, with a high near 15.
Monday Night
Mostly clear, with a low around 6.
Tuesday
Mostly sunny, with a high near 26.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 24.
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)
2:11 am CST Jan 22, 2026
2am CST Jan 22, 2026-6pm CST Jan 28, 2026



