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

28°F

-2°C

Humidity 82%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 14 Feb 12:35 am CST
Extended Forecast for

4 Miles WNW Castleton IL

  • Overnight

    Overnight: Partly cloudy, with a low around 30. Calm wind.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 55. Calm wind becoming south around 5 mph.

    High: 55 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Slight Chance
    Rain then
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, sunny, with a high near 61. Calm wind becoming west northwest around 5 mph.

    High: 61 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 39. Calm wind becoming south southwest around 6 mph after midnight.

    Low: 39 °F

    Increasing
    Clouds

  • Washington's Birthday

    Washington's Birthday: Partly sunny, with a high near 63. South southwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 63 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. South wind around 6 mph, with gusts as high as 15 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 30. Calm wind.
Saturday
Mostly cloudy, with a high near 55. Calm wind becoming south around 5 mph.
Saturday Night
A 20 percent chance of rain before midnight. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 36. Calm wind.
Sunday
Patchy fog before 7am. Otherwise, sunny, with a high near 61. Calm wind becoming west northwest around 5 mph.
Sunday Night
Increasing clouds, with a low around 39. Calm wind becoming south southwest around 6 mph after midnight.
Washington's Birthday
Partly sunny, with a high near 63. South southwest wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 42. South wind around 6 mph, with gusts as high as 15 mph.
Tuesday
Mostly cloudy, with a high near 60.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 48.
Wednesday
Partly sunny, with a high near 64.
Wednesday Night
Partly cloudy, with a low around 36.
Thursday
A chance of rain. Partly sunny, with a high near 56.
Thursday Night
A chance of rain. Partly cloudy, with a low around 32.
Friday
Mostly sunny, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WNW Castleton IL
 41.14°N 89.77°W (Elev. 676 ft)
Last Update:
12:36 am CST Feb 14, 2026
Forecast Valid:
1am CST Feb 14, 2026-6pm CST Feb 20, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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