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

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

66°F

19°C

Humidity 70%
Wind Speed E 3 mph
Barometer 30.21 in (1022.7 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 14 Oct 9:54 pm CDT
Extended Forecast for

4 Miles WSW Hardin IL

  • Tonight

    Tonight: Partly cloudy, with a low around 59. East wind 3 to 5 mph.

    Low: 59 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 59. East wind around 6 mph.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 81. Southeast wind 3 to 8 mph.

    High: 81 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 60. Southeast wind around 6 mph.

    Low: 60 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. Chance of precipitation is 70%.

    High: 75 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 49. Chance of precipitation is 50%.

    Low: 49 °F

    Chance
    Showers

Detailed Forecast

Tonight
Partly cloudy, with a low around 59. East wind 3 to 5 mph.
Wednesday
Mostly sunny, with a high near 81. Calm wind becoming northeast around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 59. East wind around 6 mph.
Thursday
Sunny, with a high near 81. Southeast wind 3 to 8 mph.
Thursday Night
Partly cloudy, with a low around 60. Southeast wind around 6 mph.
Friday
Partly sunny, with a high near 84.
Friday Night
A 40 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 61.
Saturday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 75. Chance of precipitation is 70%.
Saturday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 49. Chance of precipitation is 50%.
Sunday
A 20 percent chance of showers before 1pm. Sunny, with a high near 66.
Sunday Night
Clear, with a low around 46.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 52.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Hardin IL
 39.14°N 90.69°W (Elev. 430 ft)
Last Update:
9:36 pm CDT Oct 14, 2025
Forecast Valid:
10pm CDT Oct 14, 2025-6pm CDT Oct 21, 2025
 
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