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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fog/Mist

48°F

9°C

Humidity 89%
Wind Speed NE 9 mph
Barometer 30.06 in (1017.9 mb)
Dewpoint 45°F (7°C)
Visibility 6.00 mi
Wind Chill44°F (7°C)
Last update 3 Mar 6:54 pm CST
Extended Forecast for

Rockbridge IL

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly before 4am, then a chance of showers and thunderstorms after 4am. Patchy dense fog before 3am, then patchy dense fog after 4am. Low around 45. Northeast wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    Low: 45 °F

    Showers and
    Patchy Dense
    Fog

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy dense fog before 11am. Otherwise, cloudy, with a high near 58. Northeast wind 3 to 7 mph. Chance of precipitation is 70%.

    High: 58 °F

    Chance
    T-storms and
    Patchy Dense
    Fog then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm. Patchy fog between 11pm and 2am. Low around 50. Light and variable wind becoming southwest 5 to 8 mph after midnight. Chance of precipitation is 90%.

    Low: 50 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: A 50 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 66. West wind 5 to 9 mph becoming south in the afternoon.

    High: 66 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers, then showers likely and possibly a thunderstorm after midnight. Partly cloudy, with a low around 52. Light south wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 60%.

    Low: 52 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. Chance of precipitation is 60%.

    High: 78 °F

    Showers
    Likely then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 54. Chance of precipitation is 90%.

    Low: 54 °F

    Chance
    T-storms then
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers before noon. Mostly cloudy, with a high near 64.

    High: 64 °F

    Chance
    Showers then
    Partly Sunny

  • Saturday Night

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

    Low: 39 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers and possibly a thunderstorm, mainly before 4am, then a chance of showers and thunderstorms after 4am. Patchy dense fog before 3am, then patchy dense fog after 4am. Low around 45. Northeast wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Wednesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Patchy dense fog before 11am. Otherwise, cloudy, with a high near 58. Northeast wind 3 to 7 mph. Chance of precipitation is 70%.
Wednesday Night
Showers and possibly a thunderstorm. Patchy fog between 11pm and 2am. Low around 50. Light and variable wind becoming southwest 5 to 8 mph after midnight. Chance of precipitation is 90%.
Thursday
A 50 percent chance of showers. Cloudy, then gradually becoming mostly sunny, with a high near 66. West wind 5 to 9 mph becoming south in the afternoon.
Thursday Night
A chance of showers, then showers likely and possibly a thunderstorm after midnight. Partly cloudy, with a low around 52. Light south wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. Chance of precipitation is 60%.
Friday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after midnight. Low around 54. Chance of precipitation is 90%.
Saturday
A 40 percent chance of showers before noon. Mostly cloudy, with a high near 64.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 73.
Monday Night
A 30 percent chance of showers and thunderstorms. Mostly clear, with a low around 55.
Tuesday
Showers likely. Partly sunny, with a high near 74. Chance of precipitation is 60%.
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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:
4:56 pm CST Mar 3, 2026
Forecast Valid:
7pm CST Mar 3, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation