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

28°F

-2°C

Humidity 69%
Wind Speed NE 9 mph
Barometer 30.34 in (1027.6 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill19°F (-7°C)
Last update 7 Feb 4:54 am CST
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: Sunny, with a high near 36. Northeast wind around 7 mph becoming southeast in the afternoon.

    High: 36 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 27. Southeast wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 27 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 46. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 46 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 30. East wind around 6 mph becoming calm after midnight.

    Low: 30 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 57. Calm wind becoming south around 6 mph in the afternoon.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

  • Wednesday

    Wednesday: A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 48.

    High: 48 °F

    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 36. Northeast wind around 7 mph becoming southeast in the afternoon.
Tonight
Mostly cloudy, with a low around 27. Southeast wind 7 to 11 mph, with gusts as high as 22 mph.
Sunday
Mostly sunny, with a high near 46. Southeast wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday Night
Mostly clear, with a low around 30. East wind around 6 mph becoming calm after midnight.
Monday
Sunny, with a high near 57. Calm wind becoming south around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 42.
Tuesday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 65.
Tuesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Wednesday
A 30 percent chance of rain, mainly before noon. Mostly cloudy, with a high near 48.
Wednesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 32.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 45.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 32.
Friday
A 30 percent chance of rain. Mostly cloudy, with a high near 44.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSW Hardin IL
 39.1°N 90.64°W (Elev. 758 ft)
Last Update:
5:06 am CST Feb 7, 2026
Forecast Valid:
5am CST Feb 7, 2026-6pm CST Feb 13, 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