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Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Fair

62°F

17°C

Humidity 56%
Wind Speed S 6 mph
Barometer 29.92 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 6 Oct 8:35 pm CDT
Extended Forecast for

Castleton IL

  • Tonight

    Tonight: Mostly clear, with a low around 55. South southwest wind 7 to 9 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79. Southwest wind 6 to 8 mph becoming northwest in the afternoon. Winds could gust as high as 16 mph.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. Northwest wind 3 to 6 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 72. North northwest wind around 6 mph.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 75. Light southeast wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 75 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. South southeast wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 55. South southwest wind 7 to 9 mph, with gusts as high as 18 mph.
Wednesday
Sunny, with a high near 79. Southwest wind 6 to 8 mph becoming northwest in the afternoon. Winds could gust as high as 16 mph.
Wednesday Night
Mostly clear, with a low around 52. Northwest wind 3 to 6 mph.
Thursday
Sunny, with a high near 72. North northwest wind around 6 mph.
Thursday Night
Mostly clear, with a low around 49. Calm wind.
Friday
Sunny, with a high near 75. Light southeast wind becoming south southeast 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 57. South southeast wind 8 to 11 mph, with gusts as high as 20 mph.
Saturday
Sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 56.
Columbus Day
Mostly sunny, with a high near 78.
Monday Night
A chance of showers. Partly cloudy, with a low around 57.
Tuesday
A chance of showers. Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castleton IL
 41.1°N 89.68°W (Elev. 820 ft)
Last Update:
7:41 pm CDT Oct 6, 2026
Forecast Valid:
9pm CDT Oct 6, 2026-6pm CDT Oct 13, 2026
 
Forecast Discussion
 
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Additional Resources

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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