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.

A Few Clouds

64°F

18°C

Humidity 93%
Wind Speed Calm
Barometer 29.88 in (1011.4 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 31 Mar 8:54 pm CDT
Extended Forecast for

3 Miles WNW Carrollton IL

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 51. Southwest wind 7 to 9 mph becoming northeast after midnight. Chance of precipitation is 90%.

    Low: 51 °F

    T-storms then
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 66. East wind around 10 mph. Chance of precipitation is 70%.

    High: 66 °F

    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 59. East wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.

    Low: 59 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 76. Breezy, with a south wind 17 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 90%.

    High: 76 °F

    Breezy.
    Showers
    Likely then
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 57. Southwest wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    Low: 57 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%.

    Low: 48 °F

    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.

    High: 61 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 51. Southwest wind 7 to 9 mph becoming northeast after midnight. Chance of precipitation is 90%.
Wednesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 66. East wind around 10 mph. Chance of precipitation is 70%.
Wednesday Night
A chance of showers and thunderstorms before 10pm, then a chance of showers between 10pm and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 59. East wind 10 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 40%.
Thursday
Showers and possibly a thunderstorm. High near 76. Breezy, with a south wind 17 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57. Southwest wind 7 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms before 10am, then a chance of showers between 10am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Friday Night
Showers and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers before 1am. Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 33.
Monday
Sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Mostly sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Carrollton IL
 39.29°N 90.46°W (Elev. 607 ft)
Last Update:
8:16 pm CDT Mar 31, 2026
Forecast Valid:
9pm CDT Mar 31, 2026-6pm CDT Apr 7, 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