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

43°F

6°C

Humidity 60%
Wind Speed E 3 mph
Barometer 30.30 in (1026.3 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 12 Feb 9:54 am CST
Extended Forecast for

4 Miles SSW Hardin IL

  • Today

    Today: Partly sunny, with a high near 53. South wind 6 to 8 mph.

    High: 53 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 34. Southeast wind 6 to 8 mph.

    Low: 34 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 58. South wind around 6 mph becoming calm in the afternoon.

    High: 58 °F

    Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 38. Light southeast wind.

    Low: 38 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Rain likely, mainly after noon. Cloudy, with a high near 50. Southeast wind 3 to 7 mph. Chance of precipitation is 60%.

    High: 50 °F

    Chance Rain
    then Rain
    Likely

  • Saturday Night

    Saturday Night: Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.

    Low: 42 °F

    Rain Likely
    then Chance
    Rain

  • Sunday

    Sunday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 56.

    High: 56 °F

    Slight Chance
    Rain then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 53. South wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 34. Southeast wind 6 to 8 mph.
Friday
Sunny, with a high near 58. South wind around 6 mph becoming calm in the afternoon.
Friday Night
Increasing clouds, with a low around 38. Light southeast wind.
Saturday
Rain likely, mainly after noon. Cloudy, with a high near 50. Southeast wind 3 to 7 mph. Chance of precipitation is 60%.
Saturday Night
Rain likely, mainly before midnight. Mostly cloudy, with a low around 42. Chance of precipitation is 70%.
Sunday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 56.
Sunday Night
Mostly clear, with a low around 35.
Washington's Birthday
Mostly sunny, with a high near 60.
Monday Night
Mostly cloudy, with a low around 45.
Tuesday
Mostly cloudy, with a high near 64.
Tuesday Night
Mostly cloudy, with a low around 53.
Wednesday
Partly sunny, with a high near 65.
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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:
6:36 am CST Feb 12, 2026
Forecast Valid:
10am CST Feb 12, 2026-6pm CST Feb 18, 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