National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
News Headlines

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

Overcast

74°F

23°C

Humidity 82%
Wind Speed NW 3 mph
Barometer 30.04 in (1016.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 14 Oct 11:54 am CDT
Extended Forecast for

Mount Zion IL

  • This Afternoon

    This Afternoon: A 40 percent chance of showers before 2pm. Mostly cloudy, with a high near 77. North wind around 6 mph.

    High: 77 °F

    Chance
    Showers

  • Tonight

    Tonight: A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 59. East northeast wind 7 to 10 mph, with gusts as high as 16 mph.

    Low: 59 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms before 3pm, then showers and possibly a thunderstorm, mainly after 3pm. High near 76. East wind 7 to 10 mph becoming south in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers

  • Thursday Night

    Thursday Night: Showers, mainly before 1am. Low around 46. Breezy, with a west southwest wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 46 °F

    Showers and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 57. Breezy, with a northwest wind 23 to 26 mph, with gusts as high as 34 mph.

    High: 57 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Areas of frost after 5am. Otherwise, mostly clear, with a low around 36. North wind 6 to 14 mph, with gusts as high as 21 mph.

    Low: 36 °F

    Mostly Clear
    then Areas
    Frost

  • Saturday

    Saturday: Areas of frost before 8am. Otherwise, sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Areas Frost
    then Sunny

  • Saturday Night

    Saturday Night: Areas of frost after 5am. Otherwise, clear, with a low around 36.

    Low: 36 °F

    Clear then
    Areas Frost

  • Sunday

    Sunday: Areas of frost before 8am. Otherwise, sunny, with a high near 69.

    High: 69 °F

    Areas Frost
    then Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers before 2pm. Mostly cloudy, with a high near 77. North wind around 6 mph.
Tonight
A 20 percent chance of showers after 3am. Mostly cloudy, with a low around 59. East northeast wind 7 to 10 mph, with gusts as high as 16 mph.
Thursday
Showers and thunderstorms before 3pm, then showers and possibly a thunderstorm, mainly after 3pm. High near 76. East wind 7 to 10 mph becoming south in the afternoon. Winds could gust as high as 17 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
Showers, mainly before 1am. Low around 46. Breezy, with a west southwest wind 10 to 15 mph increasing to 17 to 22 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Partly sunny, with a high near 57. Breezy, with a northwest wind 23 to 26 mph, with gusts as high as 34 mph.
Friday Night
Areas of frost after 5am. Otherwise, mostly clear, with a low around 36. North wind 6 to 14 mph, with gusts as high as 21 mph.
Saturday
Areas of frost before 8am. Otherwise, sunny, with a high near 59. Light and variable wind.
Saturday Night
Areas of frost after 5am. Otherwise, clear, with a low around 36.
Sunday
Areas of frost before 8am. Otherwise, sunny, with a high near 69.
Sunday Night
Partly cloudy, with a low around 43.
Monday
Partly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 76.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Zion IL
 39.77°N 88.89°W (Elev. 650 ft)
Last Update:
12:06 pm CDT Oct 14, 2026
Forecast Valid:
12pm CDT Oct 14, 2026-6pm CDT Oct 20, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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