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

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Partly Cloudy

31°F

-1°C

Humidity 61%
Wind Speed E 6 mph
Barometer 30.39 in (1029.5 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 4 Feb 2:54 pm CST
Extended Forecast for

Rockbridge IL

  • Tonight

    Tonight: Increasing clouds, with a low around 11. North wind around 5 mph becoming calm in the evening.

    Low: 11 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, with a high near 38. Light south wind becoming southwest 6 to 11 mph in the morning.

    High: 38 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 25. West wind 5 to 9 mph.

    Low: 25 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 47. Breezy, with a west wind 11 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph.

    High: 47 °F

    Sunny then
    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 22. North wind 5 to 11 mph, with gusts as high as 21 mph.

    Low: 22 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 27.

    Low: 27 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 11. North wind around 5 mph becoming calm in the evening.
Thursday
Mostly cloudy, with a high near 38. Light south wind becoming southwest 6 to 11 mph in the morning.
Thursday Night
Partly cloudy, with a low around 25. West wind 5 to 9 mph.
Friday
Mostly sunny, with a high near 47. Breezy, with a west wind 11 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph.
Friday Night
Partly cloudy, with a low around 22. North wind 5 to 11 mph, with gusts as high as 21 mph.
Saturday
Mostly sunny, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 24.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 27.
Monday
Sunny, with a high near 55.
Monday Night
Mostly clear, with a low around 36.
Tuesday
A 20 percent chance of rain. Partly sunny, with a high near 58.
Tuesday Night
A 30 percent chance of rain. Partly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain. Mostly sunny, with a high near 53.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
2:37 pm CST Feb 4, 2026
Forecast Valid:
3pm CST Feb 4, 2026-6pm CST Feb 11, 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