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

58°F

14°C

Humidity 90%
Wind Speed NE 3 mph
Barometer 30.19 in (1022.0 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 3 Aug 1:54 am CDT
Extended Forecast for

Mount Zion IL

  • Overnight

    Overnight: Mostly clear, with a low around 54. Northeast wind around 6 mph.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80. East northeast wind 6 to 9 mph.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 60. East northeast wind around 7 mph.

    Low: 60 °F

    Partly Cloudy

  • Monday

    Monday: A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 81. East wind 6 to 8 mph. Chance of precipitation is 30%.

    High: 81 °F

    Partly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A chance of thunderstorms before 7pm. Mostly cloudy, with a low around 64. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. East southeast wind 3 to 6 mph.

    High: 83 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 65. East southeast wind around 5 mph becoming calm in the evening.

    Low: 65 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 54. Northeast wind around 6 mph.
Sunday
Sunny, with a high near 80. East northeast wind 6 to 9 mph.
Sunday Night
Partly cloudy, with a low around 60. East northeast wind around 7 mph.
Monday
A chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 81. East wind 6 to 8 mph. Chance of precipitation is 30%.
Monday Night
A chance of thunderstorms before 7pm. Mostly cloudy, with a low around 64. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 83. East southeast wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 65. East southeast wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 85.
Wednesday Night
Mostly clear, with a low around 67.
Thursday
Sunny, with a high near 86.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 70.
Saturday
Sunny, with a high near 89.
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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:
1:40 am CDT Aug 3, 2025
Forecast Valid:
2am CDT Aug 3, 2025-6pm CDT Aug 9, 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