National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Fair

69°F

21°C

Humidity 41%
Wind Speed NW 17 G 28 mph
Barometer 29.68 in (1004.7 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Last update 15 Nov 4:54 pm CST
Extended Forecast for

Mount Zion IL

  • Tonight

    Tonight: Clear, with a low around 37. North northwest wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 37 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 54. Northwest wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 54 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30. West northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 55. Calm wind becoming southeast 5 to 9 mph in the morning.

    High: 55 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Rain likely. Mostly cloudy, with a low around 42. Southeast wind 9 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 42 °F

    Rain Likely

  • Tuesday

    Tuesday: A 40 percent chance of rain. Mostly cloudy, with a high near 60. South southeast wind 10 to 14 mph, with gusts as high as 18 mph.

    High: 60 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. East northeast wind 7 to 9 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 57.

    High: 57 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Clear, with a low around 37. North northwest wind 10 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 54. Northwest wind 8 to 13 mph, with gusts as high as 18 mph.
Sunday Night
Mostly clear, with a low around 30. West northwest wind 5 to 7 mph becoming calm in the evening.
Monday
Mostly sunny, with a high near 55. Calm wind becoming southeast 5 to 9 mph in the morning.
Monday Night
Rain likely. Mostly cloudy, with a low around 42. Southeast wind 9 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Tuesday
A 40 percent chance of rain. Mostly cloudy, with a high near 60. South southeast wind 10 to 14 mph, with gusts as high as 18 mph.
Tuesday Night
Mostly cloudy, with a low around 39. East northeast wind 7 to 9 mph.
Wednesday
Mostly cloudy, with a high near 57.
Wednesday Night
A 40 percent chance of rain after midnight. Mostly cloudy, with a low around 44.
Thursday
Rain. High near 60. Chance of precipitation is 80%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 50.
Friday
Rain likely. Mostly cloudy, with a high near 60.
Friday Night
A chance of rain. Mostly cloudy, with a low around 39.
Saturday
Partly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Zion IL
 39.77°N 88.89°W (Elev. 650 ft)
Last Update:
4:26 pm CST Nov 15, 2025
Forecast Valid:
5pm CST Nov 15, 2025-6pm CST Nov 22, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation