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.

Mostly Cloudy

75°F

24°C

Humidity 58%
Wind Speed NW 9 mph
Barometer 29.83 in (1009.6 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 31 Mar 3:54 pm CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southwest wind around 10 mph, with gusts as high as 24 mph.

    High: 81 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 54. Southwest wind around 6 mph becoming northeast after midnight. Chance of precipitation is 90%.

    Low: 54 °F

    T-storms

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms after 4pm. Cloudy, with a high near 67. East wind around 7 mph. Chance of precipitation is 70%.

    High: 67 °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 62. Southeast wind 9 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.

    Low: 62 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 75. South wind around 17 mph, with gusts as high as 34 mph. Chance of precipitation is 90%.

    High: 75 °F

    Showers

  • Thursday Night

    Thursday 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. Partly cloudy, with a low around 58. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 50%.

    High: 80 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 50. Chance of precipitation is 90%.

    Low: 50 °F

    Showers

  • Saturday

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

    High: 60 °F

    Showers
    Likely

Detailed Forecast

This Afternoon
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 81. Southwest wind around 10 mph, with gusts as high as 24 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 10pm. Low around 54. Southwest wind around 6 mph becoming northeast after midnight. Chance of precipitation is 90%.
Wednesday
Showers likely and possibly a thunderstorm before 4pm, then a chance of showers and thunderstorms after 4pm. Cloudy, with a high near 67. East wind around 7 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 62. Southeast wind 9 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Thursday
Showers and possibly a thunderstorm. High near 75. South wind around 17 mph, with gusts as high as 34 mph. Chance of precipitation is 90%.
Thursday 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. Partly cloudy, with a low around 58. Chance of precipitation is 50%.
Friday
A chance of showers and thunderstorms before 7am, then a chance of showers between 7am and 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 50%.
Friday Night
Showers and possibly a thunderstorm. Low around 50. 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 60. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 36.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Mostly clear, with a low around 34.
Monday
Sunny, with a high near 63.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
2:56 pm CDT Mar 31, 2026
Forecast Valid:
4pm 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