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.

Fair

74°F

23°C

Humidity 26%
Wind Speed N 12 G 22 mph
Barometer 30.01 in (1016.0 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Last update 13 May 4:54 pm CDT
Extended Forecast for

2 Miles NW Rockbridge IL

  • Tonight

    Tonight: Clear, with a low around 42. North wind 8 to 13 mph becoming light and variable in the evening. Winds could gust as high as 21 mph.

    Low: 42 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 73. Calm wind becoming southeast 5 to 9 mph in the morning.

    High: 73 °F

    Sunny

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Increasing clouds, with a low around 53. Southeast wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 53 °F

    Partly Cloudy
    then Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. South wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 81 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61. South wind 6 to 11 mph, with gusts as high as 20 mph.

    Low: 61 °F

    Chance
    T-storms

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Chance of precipitation is 70%.

    High: 84 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.

    Low: 60 °F

    Chance
    T-storms

  • Sunday

    Sunday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 42. North wind 8 to 13 mph becoming light and variable in the evening. Winds could gust as high as 21 mph.
Thursday
Sunny, with a high near 73. Calm wind becoming southeast 5 to 9 mph in the morning.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4am. Increasing clouds, with a low around 53. Southeast wind 9 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Friday
Showers likely and possibly a thunderstorm before 10am, then a chance of showers and thunderstorms between 10am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 81. South wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Friday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 61. South wind 6 to 11 mph, with gusts as high as 20 mph.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 84. Chance of precipitation is 70%.
Saturday Night
A 40 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 60.
Sunday
Mostly sunny, with a high near 85.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 66.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 88. Breezy.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 65. Chance of precipitation is 60%.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 80. Chance of precipitation is 70%.
Tuesday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 58.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NW Rockbridge IL
 39.28°N 90.23°W (Elev. 499 ft)
Last Update:
4:51 pm CDT May 13, 2026
Forecast Valid:
5pm CDT May 13, 2026-6pm CDT May 20, 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