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

Hazardous Weather Conditions

Current conditions at

Decatur Airport (KDEC)

Lat: 39.83°NLon: 88.87°WElev: 670ft.

A Few Clouds

79°F

26°C

Humidity 52%
Wind Speed E 8 mph
Barometer 30.01 in (1015.8 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 26 May 1:54 pm CDT
Extended Forecast for

Mount Zion IL

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 82. East wind around 7 mph.

    High: 82 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 61. East southeast wind around 6 mph becoming light and variable after midnight.

    Low: 61 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm. Mostly sunny, with a high near 82. North northeast wind 5 to 9 mph. Chance of precipitation is 30%.

    High: 82 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. Northeast wind around 6 mph becoming light and variable.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 82. Northeast wind 8 to 13 mph, with gusts as high as 17 mph.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57. East northeast wind 8 to 10 mph, with gusts as high as 15 mph.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 78. East wind around 8 mph.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 82. East wind around 7 mph.
Tonight
A 30 percent chance of showers, mainly after 4am. Mostly cloudy, with a low around 61. East southeast wind around 6 mph becoming light and variable after midnight.
Wednesday
A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 4pm. Mostly sunny, with a high near 82. North northeast wind 5 to 9 mph. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 59. Northeast wind around 6 mph becoming light and variable.
Thursday
Mostly sunny, with a high near 82. Northeast wind 8 to 13 mph, with gusts as high as 17 mph.
Thursday Night
Partly cloudy, with a low around 57. East northeast wind 8 to 10 mph, with gusts as high as 15 mph.
Friday
Mostly sunny, with a high near 78. East wind around 8 mph.
Friday Night
Mostly cloudy, with a low around 58.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 78.
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:
1:26 pm CDT May 26, 2026
Forecast Valid:
2pm CDT May 26, 2026-6pm CDT Jun 1, 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