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.

Fair

29°F

-2°C

Humidity 75%
Wind Speed N 9 mph
Barometer 30.31 in (1026.7 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 7 Feb 3:54 am CST
Extended Forecast for

Rockbridge IL

  • Today

    Today: Sunny, with a high near 34. Northeast wind around 6 mph becoming southeast in the afternoon.

    High: 34 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 24. Southeast wind 6 to 10 mph.

    Low: 24 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, then gradually becoming sunny, with a high near 43. Southeast wind 7 to 10 mph.

    High: 43 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. East wind around 6 mph becoming calm after midnight.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 55. Calm wind becoming south around 6 mph in the morning.

    High: 55 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 34.

    Low: 34 °F

    Chance Rain

  • Wednesday

    Wednesday: A 20 percent chance of rain. Mostly cloudy, with a high near 48.

    High: 48 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 34. Northeast wind around 6 mph becoming southeast in the afternoon.
Tonight
Mostly cloudy, with a low around 24. Southeast wind 6 to 10 mph.
Sunday
Mostly cloudy, then gradually becoming sunny, with a high near 43. Southeast wind 7 to 10 mph.
Sunday Night
Mostly clear, with a low around 26. East wind around 6 mph becoming calm after midnight.
Monday
Sunny, with a high near 55. Calm wind becoming south around 6 mph in the morning.
Monday Night
Mostly clear, with a low around 39.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 34.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 48.
Wednesday Night
A 30 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 29.
Thursday
A 30 percent chance of rain. Mostly cloudy, with a high near 46.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 29.
Friday
A 30 percent chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.28°N 90.2°W (Elev. 531 ft)
Last Update:
3:52 am CST Feb 7, 2026
Forecast Valid:
4am CST Feb 7, 2026-6pm CST Feb 13, 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