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.

Overcast

68°F

20°C

Humidity 85%
Wind Speed N 8 G 18 mph
Barometer 29.78 in
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 1 Aug 8:35 pm CDT
Extended Forecast for

Eureka IL

  • Tonight

    Tonight: A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Cloudy, with a low around 65. Breezy, with a north wind 15 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.

    Low: 65 °F

    Chance
    Showers and
    Breezy then
    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 79. North wind around 16 mph, with gusts as high as 25 mph.

    High: 79 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60. North northeast wind 5 to 10 mph, with gusts as high as 18 mph.

    Low: 60 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 81. Northeast wind around 6 mph.

    High: 81 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61. Light east southeast wind.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 83. Light southeast wind.

    High: 83 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Cloudy, with a low around 65. Breezy, with a north wind 15 to 21 mph, with gusts as high as 29 mph. Chance of precipitation is 50%.
Sunday
Partly sunny, with a high near 79. North wind around 16 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 60. North northeast wind 5 to 10 mph, with gusts as high as 18 mph.
Monday
Mostly sunny, with a high near 81. Northeast wind around 6 mph.
Monday Night
Mostly clear, with a low around 61. Light east southeast wind.
Tuesday
Sunny, with a high near 83. Light southeast wind.
Tuesday Night
Mostly clear, with a low around 64. Calm wind.
Wednesday
Mostly sunny, with a high near 82.
Wednesday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 64.
Thursday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 81.
Thursday Night
Partly cloudy, with a low around 66.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Eureka IL
 40.73°N 89.27°W (Elev. 774 ft)
Last Update:
8:36 pm CDT Aug 1, 2026
Forecast Valid:
8pm CDT Aug 1, 2026-6pm CDT Aug 8, 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