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

77°F

25°C

Humidity 88%
Wind Speed SW 7 mph
Barometer 30.11 in (1019.0 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 15 Aug 10:54 am CDT
Extended Forecast for

Warrensburg IL

  • Today

    Today: A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 86. South southwest wind 7 to 10 mph.

    High: 86 °F

    Chance
    Showers

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 74. South southwest wind 6 to 9 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.

    Low: 74 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 86. West northwest wind 6 to 10 mph, with gusts as high as 15 mph.

    High: 86 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68. North northwest wind 6 to 10 mph, with gusts as high as 16 mph.

    Low: 68 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 82. North wind 6 to 8 mph.

    High: 82 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the morning.

    High: 84 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.

    Low: 70 °F

    Mostly Clear
    then Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84.

    High: 84 °F

    Chance
    T-storms

Detailed Forecast

Today
A 30 percent chance of showers, mainly before noon. Partly sunny, with a high near 86. South southwest wind 7 to 10 mph.
Tonight
A 30 percent chance of showers and thunderstorms, mainly after 3am. Mostly cloudy, with a low around 74. South southwest wind 6 to 9 mph becoming west northwest after midnight. Winds could gust as high as 17 mph.
Sunday
A 30 percent chance of showers and thunderstorms, mainly before 3pm. Partly sunny, with a high near 86. West northwest wind 6 to 10 mph, with gusts as high as 15 mph.
Sunday Night
Partly cloudy, with a low around 68. North northwest wind 6 to 10 mph, with gusts as high as 16 mph.
Monday
Mostly sunny, with a high near 82. North wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 63. North wind around 6 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 84. Calm wind becoming south 5 to 7 mph in the morning.
Tuesday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70.
Wednesday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
Mostly sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 59.
Friday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Warrensburg IL
 39.93°N 89.05°W (Elev. 699 ft)
Last Update:
11:01 am CDT Aug 15, 2026
Forecast Valid:
11am CDT Aug 15, 2026-6pm CDT Aug 21, 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