National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Marshall County Airport (KC75)

Lat: 41.02°NLon: 89.39°WElev: 545ft.

Fair

72°F

22°C

Humidity 71%
Wind Speed SW 8 mph
Barometer 29.70 in
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 15 Apr 1:35 am CDT
Extended Forecast for

Castleton IL

  • Overnight

    Overnight: Showers and thunderstorms likely, mainly after 4am. Mostly cloudy, with a low around 64. Southwest wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    T-storms
    Likely

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 7am, then showers likely and possibly a thunderstorm after 7am. Cloudy, with a high near 76. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    T-storms
    Likely then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 3am. Mostly cloudy, with a low around 59. South southwest wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 59 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday

    Thursday: A 40 percent chance of showers after 7am. Mostly cloudy, then gradually becoming sunny, with a high near 76. West wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 76 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 55. West wind around 6 mph becoming light and variable.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 83. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 83 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers, with thunderstorms also possible after 7pm. Low around 48. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

    Low: 48 °F

    Showers

  • Saturday

    Saturday: A 30 percent chance of showers. Partly sunny, with a high near 60. Breezy.

    High: 60 °F

    Chance
    Showers and
    Breezy

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers and thunderstorms likely, mainly after 4am. Mostly cloudy, with a low around 64. Southwest wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms likely before 7am, then showers likely and possibly a thunderstorm after 7am. Cloudy, with a high near 76. South southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
Showers and thunderstorms likely, mainly before 3am. Mostly cloudy, with a low around 59. South southwest wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Thursday
A 40 percent chance of showers after 7am. Mostly cloudy, then gradually becoming sunny, with a high near 76. West wind 10 to 14 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 55. West wind around 6 mph becoming light and variable.
Friday
A 30 percent chance of showers after 1pm. Mostly sunny, with a high near 83. South wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Showers, with thunderstorms also possible after 7pm. Low around 48. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.
Saturday
A 30 percent chance of showers. Partly sunny, with a high near 60. Breezy.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Sunny, with a high near 54.
Sunday Night
Mostly clear, with a low around 36.
Monday
Sunny, with a high near 65.
Monday Night
Mostly clear, with a low around 48.
Tuesday
Sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castleton IL
 41.12°N 89.71°W (Elev. 768 ft)
Last Update:
1:26 am CDT Apr 15, 2026
Forecast Valid:
1am CDT Apr 15, 2026-6pm CDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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