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

57°F

14°C

Humidity 72%
Wind Speed S 7 mph
Barometer 30.15 in (1020.6 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 28 Oct 11:54 pm CDT
Extended Forecast for

Mount Zion IL

  • Overnight

    Overnight: Partly cloudy, with a low around 54. South wind around 9 mph, with gusts as high as 15 mph.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 78. South southwest wind around 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.

    High: 78 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming clear, with a low around 50. North wind 5 to 7 mph becoming east northeast after midnight.

    Low: 50 °F

    Decreasing
    Clouds

  • Friday

    Friday: Increasing clouds, with a high near 74. East southeast wind 8 to 10 mph, with gusts as high as 15 mph.

    High: 74 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 53. East southeast wind around 7 mph.

    Low: 53 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 72. Southeast wind around 6 mph.

    High: 72 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 53. East wind 3 to 6 mph.

    Low: 53 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 40 percent chance of showers. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 54. South wind around 9 mph, with gusts as high as 15 mph.
Thursday
Mostly sunny, with a high near 78. South southwest wind around 10 mph becoming west northwest in the afternoon. Winds could gust as high as 18 mph.
Thursday Night
Mostly cloudy, then gradually becoming clear, with a low around 50. North wind 5 to 7 mph becoming east northeast after midnight.
Friday
Increasing clouds, with a high near 74. East southeast wind 8 to 10 mph, with gusts as high as 15 mph.
Friday Night
Mostly cloudy, with a low around 53. East southeast wind around 7 mph.
Saturday
Mostly cloudy, with a high near 72. Southeast wind around 6 mph.
Saturday Night
Mostly cloudy, with a low around 53. East wind 3 to 6 mph.
Sunday
A 40 percent chance of showers. Mostly cloudy, with a high near 69.
Sunday Night
Mostly cloudy, with a low around 53.
Monday
A 30 percent chance of showers after 1pm. Partly sunny, with a high near 69.
Monday Night
A chance of showers. Mostly cloudy, with a low around 56. Breezy.
Tuesday
A chance of showers. Partly sunny, with a high near 72. Breezy.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 54.
Wednesday
Showers likely. Partly sunny, with a high near 69.
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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:
11:41 pm CDT Oct 28, 2026
Forecast Valid:
12am CDT Oct 29, 2026-6pm CST Nov 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation