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.

Overcast

66°F

19°C

Humidity 65%
Wind Speed NW 16 G 29 mph
Barometer 29.72 in (1006.0 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 20 May 8:54 pm CDT
Extended Forecast for

Rockbridge IL

  • Tonight

    Tonight: Partly cloudy, with a low around 53. West wind 10 to 13 mph, with gusts as high as 26 mph.

    Low: 53 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 67. Breezy, with a west wind 16 to 20 mph, with gusts as high as 29 mph.

    High: 67 °F

    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48. Northwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 63. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 63 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly after 1pm. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.

    High: 64 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.

    Low: 53 °F

    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 53. West wind 10 to 13 mph, with gusts as high as 26 mph.
Wednesday
Partly sunny, with a high near 67. Breezy, with a west wind 16 to 20 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly clear, with a low around 48. Northwest wind 7 to 13 mph, with gusts as high as 21 mph.
Thursday
Mostly sunny, with a high near 63. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Thursday Night
Mostly clear, with a low around 44. Northwest wind 5 to 10 mph becoming light after midnight.
Friday
Mostly sunny, with a high near 67.
Friday Night
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 51.
Saturday
Showers likely, mainly after 1pm. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Sunday
Showers likely, mainly before 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 60%.
Sunday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 52.
Memorial Day
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 67.
Monday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 52.
Tuesday
A 30 percent chance of showers. Mostly sunny, with a high near 69.
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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:
9:52 pm CDT May 20, 2025
Forecast Valid:
9pm CDT May 20, 2025-6pm CDT May 27, 2025
 
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