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

81°F

27°C

Humidity 27%
Wind Speed SW 8 mph
Barometer 29.69 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 21 Mar 5:55 pm CDT
Extended Forecast for

4 Miles WNW Castleton IL

  • Tonight

    Tonight: Mostly clear, with a low around 54. South southwest wind around 10 mph, with gusts as high as 21 mph.

    Low: 54 °F

    Mostly Clear

  • Sunday

    Sunday: A slight chance of showers between 1pm and 4pm. Mostly cloudy, with a high near 62. Breezy, with a north northwest wind 8 to 13 mph becoming north 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    High: 62 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 30. North northeast wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 29 mph.

    Low: 30 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 52. North northeast wind around 6 mph.

    High: 52 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 34. Calm wind becoming southeast around 5 mph after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 61. South wind 6 to 10 mph, with gusts as high as 17 mph.

    High: 61 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 43. South southeast wind around 7 mph, with gusts as high as 16 mph.

    Low: 43 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 64.

    High: 64 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 54. South southwest wind around 10 mph, with gusts as high as 21 mph.
Sunday
A slight chance of showers between 1pm and 4pm. Mostly cloudy, with a high near 62. Breezy, with a north northwest wind 8 to 13 mph becoming north 16 to 21 mph in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 30. North northeast wind 13 to 18 mph decreasing to 6 to 11 mph after midnight. Winds could gust as high as 29 mph.
Monday
Mostly sunny, with a high near 52. North northeast wind around 6 mph.
Monday Night
Mostly cloudy, with a low around 34. Calm wind becoming southeast around 5 mph after midnight.
Tuesday
Partly sunny, with a high near 61. South wind 6 to 10 mph, with gusts as high as 17 mph.
Tuesday Night
Mostly cloudy, with a low around 43. South southeast wind around 7 mph, with gusts as high as 16 mph.
Wednesday
Mostly cloudy, with a high near 64.
Wednesday Night
Mostly cloudy, with a low around 48.
Thursday
Mostly sunny, with a high near 71.
Thursday Night
Mostly cloudy, with a low around 35.
Friday
Partly sunny, with a high near 51.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Mostly sunny, with a high near 53.
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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:
5:46 pm CDT Mar 21, 2026
Forecast Valid:
6pm CDT Mar 21, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation