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.

Overcast

76°F

24°C

Humidity 94%
Wind Speed Calm
Barometer 30.01 in (1015.7 mb)
Dewpoint 74°F (23°C)
Visibility 9.00 mi
Heat Index76°F (24°C)
Last update 31 Jul 2:54 am CDT
Extended Forecast for

Mount Zion IL

  • Overnight

    Overnight: A 20 percent chance of showers. Cloudy, with a low around 71. North wind around 7 mph.

    Low: 71 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 77. North northeast wind 10 to 17 mph, with gusts as high as 24 mph.

    High: 77 °F

    Chance
    Showers then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Patchy smoke before 10pm. Partly cloudy, with a low around 60. North northeast wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 60 °F

    Patchy Smoke
    then Partly
    Cloudy

  • Friday

    Friday: Sunny, with a high near 78. Northeast wind 8 to 13 mph, with gusts as high as 18 mph.

    High: 78 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. Northeast wind 6 to 10 mph.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 77. East northeast wind 6 to 9 mph.

    High: 77 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. East northeast wind around 6 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of showers. Cloudy, with a low around 71. North wind around 7 mph.
Thursday
A 30 percent chance of showers, mainly before 9am. Mostly cloudy, with a high near 77. North northeast wind 10 to 17 mph, with gusts as high as 24 mph.
Thursday Night
Patchy smoke before 10pm. Partly cloudy, with a low around 60. North northeast wind 7 to 13 mph, with gusts as high as 21 mph.
Friday
Sunny, with a high near 78. Northeast wind 8 to 13 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 57. Northeast wind 6 to 10 mph.
Saturday
Mostly sunny, with a high near 77. East northeast wind 6 to 9 mph.
Saturday Night
Partly cloudy, with a low around 57. East northeast wind around 6 mph.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 62.
Monday
Mostly sunny, with a high near 82.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
Mostly sunny, with a high near 85.
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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:
3:11 am CDT Jul 31, 2025
Forecast Valid:
3am CDT Jul 31, 2025-6pm CDT Aug 6, 2025
 
Forecast Discussion
 
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Additional Resources

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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