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

76°F

24°C

Humidity 40%
Wind Speed NW 10 G 16 mph
Barometer 29.85 in
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 16 Apr 3:35 pm CDT
Extended Forecast for

Eureka IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 76. West northwest wind around 14 mph, with gusts as high as 21 mph.

    High: 76 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 55. Calm wind becoming southeast around 6 mph after midnight.

    Low: 55 °F

    Clear

  • Friday

    Friday: A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 83. Breezy, with a south wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

  • Friday Night

    Friday Night: Showers and thunderstorms. Low around 44. South wind around 18 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    Low: 44 °F

    T-storms then
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 53. Breezy, with a west northwest wind 17 to 20 mph, with gusts as high as 28 mph.

    High: 53 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Patchy frost after 3am. Otherwise, mostly clear, with a low around 34. West wind 8 to 17 mph, with gusts as high as 26 mph.

    Low: 34 °F

    Mostly Clear
    then Patchy
    Frost

  • Sunday

    Sunday: Patchy frost before 8am. Otherwise, sunny, with a high near 55. West northwest wind 8 to 18 mph, with gusts as high as 26 mph.

    High: 55 °F

    Patchy Frost
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Areas of frost after 3am. Otherwise, mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear
    then Areas
    Frost

  • Monday

    Monday: Areas of frost before 8am. Otherwise, sunny, with a high near 64.

    High: 64 °F

    Areas Frost
    then Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 76. West northwest wind around 14 mph, with gusts as high as 21 mph.
Tonight
Clear, with a low around 55. Calm wind becoming southeast around 6 mph after midnight.
Friday
A 10 percent chance of showers and thunderstorms after 5pm. Mostly sunny, with a high near 83. Breezy, with a south wind 8 to 13 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph.
Friday Night
Showers and thunderstorms. Low around 44. South wind around 18 mph becoming west after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Saturday
A 40 percent chance of showers before 1pm. Mostly cloudy, then gradually becoming sunny, with a high near 53. Breezy, with a west northwest wind 17 to 20 mph, with gusts as high as 28 mph.
Saturday Night
Patchy frost after 3am. Otherwise, mostly clear, with a low around 34. West wind 8 to 17 mph, with gusts as high as 26 mph.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 55. West northwest wind 8 to 18 mph, with gusts as high as 26 mph.
Sunday Night
Areas of frost after 3am. Otherwise, mostly clear, with a low around 35.
Monday
Areas of frost before 8am. Otherwise, sunny, with a high near 64.
Monday Night
Mostly clear, with a low around 50.
Tuesday
Mostly sunny, with a high near 75. Breezy.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 76.
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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:
3:36 pm CDT Apr 16, 2026
Forecast Valid:
3pm CDT Apr 16, 2026-6pm CDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation