Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

19°F

-7°C

Humidity 49%
Wind Speed NW 6 mph
Barometer 30.31 in (1026.7 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill11°F (-12°C)
Last update 17 Mar 9:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: Increasing clouds, with a high near 33. Northwest wind around 6 mph becoming south in the afternoon.

    High: 33 °F

    Increasing
    Clouds

  • Tonight

    Tonight: A chance of snow before 2am, then a chance of rain.  Cloudy, with a low around 29. Southeast wind 6 to 13 mph, with gusts as high as 22 mph.  Chance of precipitation is 40%.

    Low: 29 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 62. South wind 6 to 10 mph becoming west in the afternoon.

    High: 62 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 42. Calm wind becoming south around 5 mph after midnight.

    Low: 42 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 71. South wind around 6 mph becoming west in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 74.

    High: 74 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 33. Northwest wind around 6 mph becoming south in the afternoon.
Tonight
A chance of snow before 2am, then a chance of rain. Cloudy, with a low around 29. Southeast wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 62. South wind 6 to 10 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 42. Calm wind becoming south around 5 mph after midnight.
Thursday
Mostly sunny, with a high near 71. South wind around 6 mph becoming west in the afternoon.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Mostly sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 49.
Saturday
Sunny, with a high near 76.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Mostly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 40.
Monday
Partly sunny, with a high near 54.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
6:56 am CDT Mar 17, 2026
10am CDT Mar 17, 2026-6pm CDT Mar 23, 2026
 
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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