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

32°F

0°C

Humidity 75%
Wind Speed E 8 mph
Barometer 30.16 in (1021.8 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 8 Feb 6:54 pm CST
Extended Forecast for

Rockbridge IL

  • Tonight

    Tonight: Partly cloudy, with a low around 25. East wind 5 to 8 mph becoming calm after midnight.

    Low: 25 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 51. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37. South wind 6 to 9 mph becoming west after midnight.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 54. West wind 6 to 10 mph becoming north in the morning.

    High: 54 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 29. North wind around 6 mph.

    Low: 29 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A chance of rain and snow, mainly before midnight. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.

    Low: 28 °F

    Chance
    Rain/Snow

Detailed Forecast

Tonight
Partly cloudy, with a low around 25. East wind 5 to 8 mph becoming calm after midnight.
Monday
Mostly sunny, with a high near 51. Calm wind becoming south 5 to 7 mph in the afternoon.
Monday Night
Mostly clear, with a low around 37. South wind 6 to 9 mph becoming west after midnight.
Tuesday
Sunny, with a high near 54. West wind 6 to 10 mph becoming north in the morning.
Tuesday Night
Partly cloudy, with a low around 29. North wind around 6 mph.
Wednesday
Mostly sunny, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
A 30 percent chance of rain after noon. Mostly cloudy, with a high near 43.
Thursday Night
A chance of rain and snow, mainly before midnight. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Friday
A 20 percent chance of rain after noon. Partly sunny, with a high near 42.
Friday Night
A 30 percent chance of rain. Partly cloudy, with a low around 28.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 43.
Saturday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 30.
Sunday
A slight chance of rain and snow. Mostly sunny, with a high near 48. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
4:31 pm CST Feb 8, 2026
Forecast Valid:
7pm CST Feb 8, 2026-6pm CST Feb 15, 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