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Current conditions at
Marshall County Airport (KC75)
Lat: 41.02°NLon: 89.39°WElev: 545ft.
Fair
42°F
6°C
| Humidity | 72% |
| Wind Speed | S 3 mph |
| Barometer | 30.43 in |
| Dewpoint | 33°F (1°C) |
| Visibility | 10.00 mi |
| Last update | 18 Oct 2:15 am CDT |
Extended Forecast for
Castleton IL
Overnight
Low: 37 °F
Patchy Frost
Sunday
High: 65 °F
Areas Frost
then SunnySunday Night
Low: 40 °F
Clear
Monday
High: 69 °F
Sunny
Monday Night
Low: 41 °F
Mostly Clear
Tuesday
High: 70 °F
Sunny
Tuesday Night
Low: 45 °F
Mostly Clear
Wednesday
High: 73 °F
Sunny
Wednesday Night
Low: 49 °F
Mostly Clear
Detailed Forecast
Overnight
Patchy frost after 3am. Otherwise, clear, with a low around 37. South wind around 7 mph, with gusts as high as 15 mph.
Sunday
Areas of frost before 9am. Otherwise, sunny, with a high near 65. South wind 8 to 14 mph, with gusts as high as 21 mph.
Sunday Night
Clear, with a low around 40. South wind 3 to 6 mph.
Monday
Sunny, with a high near 69. Light south wind.
Monday Night
Mostly clear, with a low around 41. Calm wind.
Tuesday
Sunny, with a high near 70. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 45. Calm wind.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 49.
Friday
Sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 51.
Saturday
Mostly sunny, with a high near 75.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Castleton IL
41.12°N 89.71°W (Elev. 768 ft)
41.12°N 89.71°W (Elev. 768 ft)
1:51 am CDT Oct 18, 2026
2am CDT Oct 18, 2026-6pm CDT Oct 24, 2026
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