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

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Fair

33°F

1°C

Humidity 79%
Wind Speed SE 3 mph
Barometer 30.22 in
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 12 Feb 8:35 pm CST
Extended Forecast for

Eureka IL

  • Tonight

    Tonight: Mostly clear, with a low around 29. South southeast wind 5 to 7 mph, with gusts as high as 15 mph.

    Low: 29 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 55. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.

    High: 55 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32. South southwest wind around 5 mph becoming calm in the evening.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 53. Calm wind becoming south southeast around 6 mph in the morning.

    High: 53 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 37. Southeast wind around 6 mph becoming northeast after midnight.

    Low: 37 °F

    Chance Rain

  • Sunday

    Sunday: Sunny, with a high near 57. North northeast wind around 6 mph.

    High: 57 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. Light and variable wind becoming south around 6 mph after midnight.

    Low: 34 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 59.

    High: 59 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 29. South southeast wind 5 to 7 mph, with gusts as high as 15 mph.
Friday
Sunny, with a high near 55. South southwest wind 6 to 13 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 32. South southwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly cloudy, with a high near 53. Calm wind becoming south southeast around 6 mph in the morning.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 37. Southeast wind around 6 mph becoming northeast after midnight.
Sunday
Sunny, with a high near 57. North northeast wind around 6 mph.
Sunday Night
Mostly clear, with a low around 34. Light and variable wind becoming south around 6 mph after midnight.
Washington's Birthday
Partly sunny, with a high near 59.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Mostly cloudy, with a high near 61.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 50.
Wednesday
Partly sunny, with a high near 65. Breezy.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
Mostly sunny, with a high near 55.
Basemap Options
Click map to change the forecast location
Loading map...
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 CST Feb 12, 2026
Forecast Valid:
8pm CST Feb 12, 2026-6pm CST Feb 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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