Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fog/Mist

35°F

2°C

Humidity 93%
Wind Speed S 12 mph
Barometer 29.95 in (1014.9 mb)
Dewpoint 33°F (1°C)
Visibility 6.00 mi
Wind Chill27°F (-3°C)
Last update 7 Dec 2:54 am CST
Extended Forecast for

2 Miles SE Mount Zion IL

Winter Weather Advisory until December 7, 06:00am
Click here for hazard details and duration
Winter Weather Advisory
  •  
    Winter Weather Advisory until December 7, 06:00am

    NOW until 6:00am Sun

    Winter Weather Advisory

  • Overnight

    Low: 34 °F

    Slight Chance
    Rain and
    Areas Fog

  • Sunday

    Sunday: Areas of fog before 1pm.  Otherwise, cloudy, with a high near 33. South wind 5 to 15 mph becoming north in the morning. Winds could gust as high as 24 mph.

    High: 33 °F

    Areas Fog

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16. North wind 7 to 13 mph, with gusts as high as 20 mph.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 28. North northeast wind 5 to 7 mph becoming light and variable  in the afternoon.

    High: 28 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 17. South wind 5 to 10 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 24 mph.

    Low: 17 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 43. Southwest wind 14 to 18 mph, with gusts as high as 24 mph.

    High: 43 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain after midnight.  Mostly cloudy, with a low around 36. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 29 mph.

    Low: 36 °F

    Breezy.
    Cloudy then
    Chance Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 41. Breezy.

    High: 41 °F

    Mostly Cloudy
    and Breezy

Detailed Forecast

Overnight
A 20 percent chance of rain before 4am. Areas of fog. Otherwise, cloudy, with a steady temperature around 34. South wind around 7 mph.
Sunday
Areas of fog before 1pm. Otherwise, cloudy, with a high near 33. South wind 5 to 15 mph becoming north in the morning. Winds could gust as high as 24 mph.
Sunday Night
Mostly cloudy, with a low around 16. North wind 7 to 13 mph, with gusts as high as 20 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 28. North northeast wind 5 to 7 mph becoming light and variable in the afternoon.
Monday Night
Mostly cloudy, with a low around 17. South wind 5 to 10 mph increasing to 13 to 18 mph after midnight. Winds could gust as high as 24 mph.
Tuesday
Partly sunny, with a high near 43. Southwest wind 14 to 18 mph, with gusts as high as 24 mph.
Tuesday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 36. Breezy, with a southwest wind 15 to 22 mph, with gusts as high as 29 mph.
Wednesday
Mostly cloudy, with a high near 41. Breezy.
Wednesday Night
Mostly cloudy, with a low around 22.
Thursday
A 30 percent chance of snow. Mostly cloudy, with a high near 30.
Thursday Night
Mostly cloudy, with a low around 11.
Friday
Partly sunny, with a high near 20.
Friday Night
Mostly cloudy, with a low around 2.
Saturday
Partly sunny, with a high near 14.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SE Mount Zion IL
 39.75°N 88.86°W (Elev. 709 ft)
1:21 am CST Dec 7, 2025
3am CST Dec 7, 2025-6pm CST Dec 13, 2025
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database