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

23°F

-5°C

Humidity 81%
Wind Speed E 5 mph
Barometer 30.16 in (1021.6 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 9 Feb 6:54 am CST
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: Sunny, with a high near 54. Calm wind becoming south around 6 mph in the afternoon.

    High: 54 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 46. South wind 6 to 9 mph becoming west after midnight.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 55. Northwest wind around 8 mph.

    High: 55 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 30. North wind around 7 mph.

    Low: 30 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 48. North wind 3 to 6 mph.

    High: 48 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain after noon. Cloudy, with a high near 44.

    High: 44 °F

    Cloudy then
    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Cloudy, with a low around 33.

    Low: 33 °F

    Chance Rain

  • Friday

    Friday: A 20 percent chance of rain. Mostly cloudy, with a high near 43.

    High: 43 °F

    Slight Chance
    Rain

Detailed Forecast

Today
Sunny, with a high near 54. Calm wind becoming south around 6 mph in the afternoon.
Tonight
Mostly clear, with a low around 46. South wind 6 to 9 mph becoming west after midnight.
Tuesday
Sunny, with a high near 55. Northwest wind around 8 mph.
Tuesday Night
Partly cloudy, with a low around 30. North wind around 7 mph.
Wednesday
Mostly sunny, with a high near 48. North wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 32.
Thursday
A 30 percent chance of rain after noon. Cloudy, with a high near 44.
Thursday Night
A 40 percent chance of rain. Cloudy, with a low around 33.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 43.
Friday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 31.
Saturday
A 40 percent chance of rain. Mostly cloudy, with a high near 43.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 32.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 45.
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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:
5:11 am CST Feb 9, 2026
Forecast Valid:
7am CST Feb 9, 2026-6pm CST Feb 15, 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