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.

Thunderstorm Heavy Rain Fog/Mist

48°F

9°C

Humidity 100%
Wind Speed S 6 mph
Barometer 30.07 in (1018.3 mb)
Dewpoint 48°F (9°C)
Visibility 0.75 mi
Wind Chill45°F (7°C)
Last update 4 Mar 11:54 am CST
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely, mainly between 1pm and 3pm. Patchy fog before 3pm. High near 56. Calm wind. Chance of precipitation is 80%.

    High: 56 °F

    T-storms and
    Patchy Fog

  • Tonight

    Tonight: Showers and thunderstorms likely before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then scattered showers and thunderstorms after 5am. Patchy fog after 8pm. Otherwise, cloudy, with a low around 51. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 70%.

    Low: 51 °F

    T-storms
    Likely and
    Patchy Fog

  • Thursday

    Thursday: Scattered showers, mainly before 7am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 65. West wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 30%.

    High: 65 °F

    Scattered
    Showers and
    Patchy Fog
    then Partly
    Sunny

  • Thursday Night

    Thursday Night: Scattered showers before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 55. Calm wind becoming southeast 5 to 9 mph in the evening. Chance of precipitation is 60%.

    Low: 55 °F

    Scattered
    Showers then
    Showers
    Likely

  • Friday

    Friday: A 50 percent chance of showers. Partly sunny, with a high near 76. South wind 10 to 14 mph, with gusts as high as 28 mph.

    High: 76 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 51. Chance of precipitation is 100%.

    Low: 51 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers before noon. Partly sunny, with a high near 60.

    High: 60 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

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

    Low: 39 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm before 1pm, then showers and thunderstorms likely, mainly between 1pm and 3pm. Patchy fog before 3pm. High near 56. Calm wind. Chance of precipitation is 80%.
Tonight
Showers and thunderstorms likely before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then scattered showers and thunderstorms after 5am. Patchy fog after 8pm. Otherwise, cloudy, with a low around 51. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 70%.
Thursday
Scattered showers, mainly before 7am. Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 65. West wind around 6 mph becoming calm in the afternoon. Chance of precipitation is 30%.
Thursday Night
Scattered showers before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 55. Calm wind becoming southeast 5 to 9 mph in the evening. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 76. South wind 10 to 14 mph, with gusts as high as 28 mph.
Friday Night
Showers and possibly a thunderstorm. Low around 51. Chance of precipitation is 100%.
Saturday
A 30 percent chance of showers before noon. Partly sunny, with a high near 60.
Saturday Night
Mostly clear, with a low around 39.
Sunday
Sunny, with a high near 65.
Sunday Night
Mostly clear, with a low around 47.
Monday
Sunny, with a high near 76.
Monday Night
A 40 percent chance of showers and thunderstorms. Mostly clear, with a low around 60.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
Basemap Options
Click map to change the forecast location
Loading map...
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:
10:26 am CST Mar 4, 2026
Forecast Valid:
12pm CST Mar 4, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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