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

40°F

4°C

Humidity 93%
Wind Speed Calm
Barometer 30.07 in
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Last update 10 Nov 7:15 am CST
Extended Forecast for

Castleton IL

  • Today

    Today: Sunny, with a high near 64. North northwest wind 3 to 5 mph.

    High: 64 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 41. Light and variable wind.

    Low: 41 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 3pm. Partly sunny, with a high near 58. Light and variable wind becoming north northwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 30%.

    High: 58 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 37. North northwest wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 46. North wind 11 to 15 mph, with gusts as high as 23 mph.

    High: 46 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 28. North northwest wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 28 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 42. North northwest wind 7 to 11 mph, with gusts as high as 18 mph.

    High: 42 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 45.

    High: 45 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 64. North northwest wind 3 to 5 mph.
Tonight
Partly cloudy, with a low around 41. Light and variable wind.
Veterans Day
A chance of showers before 1pm, then a slight chance of showers and thunderstorms between 1pm and 3pm. Partly sunny, with a high near 58. Light and variable wind becoming north northwest 8 to 13 mph in the morning. Winds could gust as high as 21 mph. Chance of precipitation is 30%.
Wednesday Night
Partly cloudy, with a low around 37. North northwest wind 9 to 13 mph, with gusts as high as 22 mph.
Thursday
Partly sunny, with a high near 46. North wind 11 to 15 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 28. North northwest wind 7 to 11 mph, with gusts as high as 18 mph.
Friday
Sunny, with a high near 42. North northwest wind 7 to 11 mph, with gusts as high as 18 mph.
Friday Night
Mostly clear, with a low around 23.
Saturday
Sunny, with a high near 45.
Saturday Night
Mostly clear, with a low around 28.
Sunday
Mostly sunny, with a high near 50.
Sunday Night
Partly cloudy, with a low around 34.
Monday
Mostly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castleton IL
 41.12°N 89.71°W (Elev. 768 ft)
Last Update:
5:16 am CST Nov 10, 2026
Forecast Valid:
7am CST Nov 10, 2026-6pm CST Nov 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation