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

67°F

19°C

Humidity 41%
Wind Speed E 7 mph
Barometer 30.19 in
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 20 May 3:35 pm CDT
Extended Forecast for

4 Miles WNW Castleton IL

  • This Afternoon

    This Afternoon: Sunny, with a high near 68. North northeast wind around 10 mph, with gusts as high as 15 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. East northeast wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 45 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 70. East wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 70 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 49. East northeast wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 49 °F

    Mostly Cloudy

  • Friday

    Friday: Showers likely after 1pm. Mostly cloudy, with a high near 68. East wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 68 °F

    Mostly Cloudy
    then Showers
    Likely

  • Friday Night

    Friday Night: Showers likely before 1am. Mostly cloudy, with a low around 54. East northeast wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Showers
    Likely

  • Saturday

    Saturday: Partly sunny, with a high near 76. Light and variable wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 15 mph.

    High: 76 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 79.

    High: 79 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 68. North northeast wind around 10 mph, with gusts as high as 15 mph.
Tonight
Mostly clear, with a low around 45. East northeast wind 7 to 10 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 70. East wind 8 to 13 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 49. East northeast wind 9 to 13 mph, with gusts as high as 22 mph.
Friday
Showers likely after 1pm. Mostly cloudy, with a high near 68. East wind 11 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers likely before 1am. Mostly cloudy, with a low around 54. East northeast wind 6 to 11 mph becoming light after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, with a high near 76. Light and variable wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 15 mph.
Saturday Night
A 30 percent chance of showers before 1am. Mostly cloudy, with a low around 55.
Sunday
Partly sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 56.
Memorial Day
Partly sunny, with a high near 83.
Monday Night
Mostly cloudy, with a low around 59.
Tuesday
Partly sunny, with a high near 83.
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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:
3:36 pm CDT May 20, 2026
Forecast Valid:
3pm CDT May 20, 2026-6pm CDT May 26, 2026
 
Forecast Discussion
 
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Additional Resources

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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