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.

Overcast

41°F

5°C

Humidity 79%
Wind Speed W 8 mph
Barometer 30.05 in (1017.6 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 7 Mar 11:54 pm CDT
Extended Forecast for

Mount Zion IL

  • Tonight

    Tonight: Mostly cloudy, with a low around 35. West southwest wind 6 to 9 mph, with gusts as high as 15 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 62. Southwest wind 8 to 17 mph, with gusts as high as 24 mph.

    High: 62 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 44. South southwest wind 11 to 14 mph, with gusts as high as 21 mph.

    Low: 44 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73. South southwest wind 13 to 18 mph, with gusts as high as 25 mph.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 58. South wind 11 to 14 mph, with gusts as high as 22 mph.

    Low: 58 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 30 mph.

    High: 78 °F

    Partly Sunny
    then Chance
    T-storms and
    Breezy

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm. Low around 51. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 51 °F

    Showers and
    Breezy

  • Wednesday

    Wednesday: Showers. High near 64. Breezy. Chance of precipitation is 100%.

    High: 64 °F

    Breezy.
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 30. Blustery.

    Low: 30 °F

    Partly Cloudy
    and Blustery

Detailed Forecast

Tonight
Mostly cloudy, with a low around 35. West southwest wind 6 to 9 mph, with gusts as high as 15 mph.
Sunday
Sunny, with a high near 62. Southwest wind 8 to 17 mph, with gusts as high as 24 mph.
Sunday Night
Clear, with a low around 44. South southwest wind 11 to 14 mph, with gusts as high as 21 mph.
Monday
Sunny, with a high near 73. South southwest wind 13 to 18 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 58. South wind 11 to 14 mph, with gusts as high as 22 mph.
Tuesday
A 50 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 78. Breezy, with a south southwest wind 11 to 20 mph, with gusts as high as 30 mph.
Tuesday Night
Showers and possibly a thunderstorm. Low around 51. Breezy, with a south southwest wind 18 to 23 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Showers. High near 64. Breezy. Chance of precipitation is 100%.
Wednesday Night
Partly cloudy, with a low around 30. Blustery.
Thursday
Mostly sunny, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 39. Breezy.
Friday
Mostly cloudy, with a high near 61. Breezy.
Friday Night
Mostly cloudy, with a low around 34.
Saturday
Mostly cloudy, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Zion IL
 39.77°N 88.89°W (Elev. 650 ft)
Last Update:
10:46 pm CST Mar 7, 2026
Forecast Valid:
10pm CST Mar 7, 2026-6pm CDT Mar 14, 2026
 
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