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

50°F

10°C

Humidity 50%
Wind Speed S 12 mph
Barometer 29.89 in (1012.2 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 26 Feb 10:54 am CST
Extended Forecast for

Rockbridge IL

  • Today

    Today: Sunny, with a high near 54. West wind around 6 mph becoming light and variable in the afternoon.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 33. Calm wind becoming southwest around 5 mph after midnight.

    Low: 33 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 68. Southwest wind 5 to 15 mph, with gusts as high as 22 mph.

    High: 68 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 35. Southwest wind 6 to 9 mph becoming northeast after midnight.

    Low: 35 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 59. East wind 6 to 13 mph.

    High: 59 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Partly cloudy, with a low around 26.

    Low: 26 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: A slight chance of snow and freezing rain before noon, then a chance of rain and snow. Cloudy, with a high near 37. Chance of precipitation is 50%.

    High: 37 °F

    Slight Chance
    Wintry Mix
    then Chance
    Rain/Snow

  • Sunday Night

    Sunday Night: Snow likely, possibly mixed with rain before midnight, then a chance of snow. Cloudy, with a low around 24. Chance of precipitation is 70%.

    Low: 24 °F

    Rain/Snow
    Likely then
    Chance Snow

  • Monday

    Monday: A slight chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 37. Chance of precipitation is 20%.

    High: 37 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 54. West wind around 6 mph becoming light and variable in the afternoon.
Tonight
Clear, with a low around 33. Calm wind becoming southwest around 5 mph after midnight.
Friday
Sunny, with a high near 68. Southwest wind 5 to 15 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 35. Southwest wind 6 to 9 mph becoming northeast after midnight.
Saturday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 59. East wind 6 to 13 mph.
Saturday Night
A 20 percent chance of rain before midnight. Partly cloudy, with a low around 26.
Sunday
A slight chance of snow and freezing rain before noon, then a chance of rain and snow. Cloudy, with a high near 37. Chance of precipitation is 50%.
Sunday Night
Snow likely, possibly mixed with rain before midnight, then a chance of snow. Cloudy, with a low around 24. Chance of precipitation is 70%.
Monday
A slight chance of rain and snow before noon, then a slight chance of rain. Mostly cloudy, with a high near 37. Chance of precipitation is 20%.
Monday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 23.
Tuesday
A 40 percent chance of rain. Cloudy, with a high near 41.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 26.
Wednesday
A 40 percent chance of rain. Mostly cloudy, with a high near 48.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rockbridge IL
 39.26°N 90.2°W (Elev. 509 ft)
Last Update:
11:11 am CST Feb 26, 2026
Forecast Valid:
11am CST Feb 26, 2026-6pm CST Mar 4, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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