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

Hazardous Weather Conditions

Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Fair

76°F

24°C

Humidity 87%
Wind Speed SE 5 mph
Barometer 30.04 in
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index76°F (24°C)
Last update 18 Aug 8:15 am CDT
Extended Forecast for

4 Miles NNW Toulon IL

Heat Advisory August 18, 12:00pm until August 18, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 90. Heat index values as high as 100. Southeast wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 60%.

    High: 90 °F

    Mostly Sunny
    then Showers
    Likely

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind around 5 mph becoming west after midnight. New rainfall amounts between a quarter and half of an inch possible.

    Low: 71 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 86. West wind around 5 mph.

    High: 86 °F

    Chance
    T-storms and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 67. North wind around 5 mph.

    Low: 67 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Mostly sunny, with a high near 90. Heat index values as high as 100. Southeast wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 60%.
Tonight
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. South wind around 5 mph becoming west after midnight. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 86. West wind around 5 mph.
Tuesday Night
Partly cloudy, with a low around 67. North wind around 5 mph.
Wednesday
Mostly sunny, with a high near 81.
Wednesday Night
Mostly clear, with a low around 60.
Thursday
Sunny, with a high near 83.
Thursday Night
Clear, with a low around 59.
Friday
Sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 64.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Sunny, with a high near 74.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Toulon IL
 41.15°N 89.88°W (Elev. 722 ft)
Last Update:
7:05 am CDT Aug 18, 2025
Forecast Valid:
8am CDT Aug 18, 2025-6pm CDT Aug 24, 2025
 
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