Hazardous Weather Conditions
Current conditions at
Decatur Airport (KDEC)
Lat: 39.83°NLon: 88.87°WElev: 670ft.
Fog/Mist
26°F
-3°C
| Humidity | 92% |
| Wind Speed | E 8 mph |
| Barometer | 29.97 in (1015.5 mb) |
| Dewpoint | 24°F (-4°C) |
| Visibility | 5.00 mi |
| Wind Chill | 18°F (-8°C) |
| Last update | 6 Dec 7:54 pm CST |
Extended Forecast for
Decatur Airport IL
Winter Weather Advisory December 6, 09:00pm until December 7, 06:00am
Tonight
Low: 26 °F⇑
Chance Wintry
Mix and
Patchy FogSunday
High: 33 °F⇓
Chance
Rain/Snow and
Patchy Fog
then CloudySunday Night

Low: 12 °F
Mostly Cloudy
Monday

High: 26 °F
Mostly Sunny
Monday Night

Low: 19 °F⇑
Mostly Cloudy
Tuesday

High: 41 °F
Partly Sunny
Tuesday Night
Low: 34 °F
Mostly Cloudy
then Chance
RainWednesday

High: 39 °F
Mostly Cloudy
Wednesday Night
Low: 20 °F
Mostly Cloudy
then Chance
Snow
Detailed Forecast
Tonight
A chance of freezing rain before 3am, then a chance of snow and freezing rain between 3am and 5am, then a slight chance of freezing rain after 5am. Patchy fog after 1am. Otherwise, cloudy, with a temperature rising to around 33 by 3am. South southeast wind around 8 mph. Chance of precipitation is 40%.
Sunday
A chance of rain and snow before 8am, then a chance of rain between 8am and noon. Patchy fog before 11am. Otherwise, cloudy, with a temperature rising to near 33 by 9am, then falling to around 26 during the remainder of the day. South wind 7 to 15 mph becoming north in the afternoon. Winds could gust as high as 23 mph. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 12. Wind chill values between 4 and 9. North northeast wind 6 to 13 mph, with gusts as high as 17 mph.
Monday
Mostly sunny, with a high near 26. Wind chill values between 5 and 15. North northeast wind around 6 mph becoming south in the afternoon.
Monday Night
Mostly cloudy, with a temperature falling to near 19 by 8pm, then rising to around 27 during the remainder of the night. South wind 6 to 15 mph, with gusts as high as 23 mph.
Tuesday
Partly sunny, with a high near 41. South southwest wind around 15 mph, with gusts as high as 23 mph.
Tuesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 34. Southwest wind 14 to 18 mph, with gusts as high as 28 mph.
Wednesday
Mostly cloudy, with a high near 39.
Wednesday Night
A 30 percent chance of snow after midnight. Mostly cloudy, with a low around 20.
Thursday
A 30 percent chance of snow before noon. Mostly cloudy, with a high near 31.
Thursday Night
Mostly cloudy, with a low around 13.
Friday
Partly sunny, with a high near 20.
Friday Night
Mostly cloudy, with a low around 3.
Saturday
Mostly sunny, with a high near 15.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Decatur Airport IL
39.84°N 88.88°W (Elev. 650 ft)
39.84°N 88.88°W (Elev. 650 ft)
6:36 pm CST Dec 6, 2025
8pm CST Dec 6, 2025-6pm CST Dec 13, 2025



