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.

Fog/Mist

37°F

3°C

Humidity 96%
Wind Speed SE 8 mph
Barometer 30.17 in (1022.2 mb)
Dewpoint 36°F (2°C)
Visibility 3.00 mi
Wind Chill31°F (-1°C)
Last update 2 Mar 11:54 pm CST
Extended Forecast for

Mount Zion IL

  • Overnight

    Overnight: Rain likely, mainly after 5am. Patchy fog after 5am. Otherwise, cloudy, with a low around 35. East wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 35 °F

    Rain Likely
    and Patchy
    Fog

  • Tuesday

    Tuesday: Rain and thunderstorms before 3pm, then rain and possibly a thunderstorm, mainly after 3pm. High near 50. East wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 50 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm, mainly before 5am, then a chance of rain and thunderstorms after 5am. Patchy fog. Low around 43. East wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 43 °F

    Rain and
    Patchy Fog

  • Wednesday

    Wednesday: Rain before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Patchy fog before 7am. High near 59. East wind 6 to 10 mph becoming south southeast in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Low around 52. South wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 52 °F

    Showers

  • Thursday

    Thursday: Showers, mainly before noon. High near 65. South southwest wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 50. West southwest wind 7 to 9 mph becoming south southeast after midnight. Winds could gust as high as 15 mph.

    Low: 50 °F

    Chance
    Showers

  • Friday

    Friday: Showers likely, mainly before noon. Mostly cloudy, with a high near 75. Breezy. Chance of precipitation is 60%.

    High: 75 °F

    Showers
    Likely and
    Breezy

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 58. Chance of precipitation is 80%.

    Low: 58 °F

    Chance
    T-storms then
    Showers

Detailed Forecast

Overnight
Rain likely, mainly after 5am. Patchy fog after 5am. Otherwise, cloudy, with a low around 35. East wind 5 to 7 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain and thunderstorms before 3pm, then rain and possibly a thunderstorm, mainly after 3pm. High near 50. East wind around 6 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday Night
Rain and possibly a thunderstorm, mainly before 5am, then a chance of rain and thunderstorms after 5am. Patchy fog. Low around 43. East wind 6 to 9 mph, with gusts as high as 15 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday
Rain before noon, then showers likely between noon and 3pm, then showers likely and possibly a thunderstorm after 3pm. Patchy fog before 7am. High near 59. East wind 6 to 10 mph becoming south southeast in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm. Low around 52. South wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 80%. New precipitation amounts between a half and three quarters of an inch possible.
Thursday
Showers, mainly before noon. High near 65. South southwest wind 9 to 14 mph, with gusts as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 50. West southwest wind 7 to 9 mph becoming south southeast after midnight. Winds could gust as high as 15 mph.
Friday
Showers likely, mainly before noon. Mostly cloudy, with a high near 75. Breezy. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 58. Chance of precipitation is 80%.
Saturday
Showers likely, mainly before noon. Cloudy, with a high near 67. Chance of precipitation is 70%.
Saturday Night
Mostly cloudy, with a low around 45.
Sunday
Partly sunny, with a high near 62.
Sunday Night
Mostly cloudy, with a low around 47.
Monday
Mostly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Zion IL
 39.77°N 88.89°W (Elev. 650 ft)
Last Update:
9:46 pm CST Mar 2, 2026
Forecast Valid:
12am CST Mar 3, 2026-6pm CDT Mar 9, 2026
 
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