Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fair and Breezy
39°F
4°C
| Humidity | 38% |
| Wind Speed | W 23 G 40 mph |
| Barometer | 30.13 in (1020.7 mb) |
| Dewpoint | 15°F (-9°C) |
| Visibility | 10.00 mi |
| Wind Chill | 28°F (-2°C) |
| Last update | 26 Nov 3:54 pm CST |
Extended Forecast for
Harristown IL
Wind Advisory until November 26, 06:00pm
NOW until 6:00pm Wed
Wind Advisory
This Afternoon
High: 41 °F
Sunny and
BreezyTonight
Low: 24 °F
Mostly Clear
Thanksgiving Day
High: 37 °F
Sunny then
Sunny and
BreezyThursday Night
Low: 18 °F
Mostly Clear
Friday
High: 34 °F
Sunny
Friday Night
Low: 24 °F
Mostly Cloudy
then Chance
SnowSaturday
High: 35 °F
Snow then
Rain/Snow and
BreezySaturday Night
Low: 24 °F
Rain then
Chance Rain
Detailed Forecast
This Afternoon
Sunny, with a high near 41. Breezy, with a west northwest wind 22 to 25 mph, with gusts as high as 36 mph.
Tonight
Mostly clear, with a low around 24. West northwest wind 13 to 18 mph, with gusts as high as 30 mph.
Thanksgiving Day
Sunny, with a high near 37. Breezy, with a west northwest wind 13 to 20 mph, with gusts as high as 24 mph.
Thursday Night
Mostly clear, with a low around 18. West northwest wind 8 to 11 mph, with gusts as high as 17 mph.
Friday
Sunny, with a high near 34. West northwest wind 5 to 7 mph becoming calm in the afternoon.
Friday Night
A 50 percent chance of snow after midnight. Increasing clouds, with a low around 24. Light south southeast wind becoming southeast 9 to 14 mph after midnight. Winds could gust as high as 20 mph.
Saturday
Snow before noon, then rain and snow. High near 35. Breezy, with a south southeast wind 15 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 90%. New precipitation amounts between a half and three quarters of an inch possible.
Saturday Night
Rain, mainly before midnight. Low around 24. Chance of precipitation is 80%.
Sunday
Mostly cloudy, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 11.
Monday
Mostly cloudy, with a high near 23.
Monday Night
Mostly cloudy, with a low around 10.
Tuesday
Mostly sunny, with a high near 25.
Tuesday Night
Partly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 32.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
Harristown IL
39.85°N 89.08°W (Elev. 653 ft)
39.85°N 89.08°W (Elev. 653 ft)
3:36 pm CST Nov 26, 2025
4pm CST Nov 26, 2025-6pm CST Dec 3, 2025
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
