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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

48°F

9°C

Humidity 41%
Wind Speed S 13 mph
Barometer 29.95 in (1014.1 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 12 Mar 9:54 pm CDT
Extended Forecast for

4 Miles SSW Hardin IL

Wind Advisory until March 13, 11:00am
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory until March 13, 11:00am

    NOW until 11:00am Fri

    Wind Advisory

  • Tonight

    Low: 45 °F

    Partly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 57. West wind 10 to 17 mph, with gusts as high as 30 mph.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 36. Northwest wind around 6 mph becoming light and variable.

    Low: 36 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 63. East wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 63 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 53. Southeast wind 10 to 13 mph, with gusts as high as 24 mph.

    Low: 53 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 90%.

    High: 66 °F

    Rain Likely
    then Rain

  • Sunday Night

    Sunday Night: Rain and snow before 1am, then a chance of snow. Some thunder is also possible. Low around 20. Blustery. Chance of precipitation is 80%.

    Low: 20 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: A 20 percent chance of snow before 1pm. Partly sunny, with a high near 26. Blustery.

    High: 26 °F

    Slight Chance
    Snow and
    Blustery

Detailed Forecast

Tonight
Mostly cloudy, with a low around 45. Breezy, with a light and variable wind becoming southwest 16 to 21 mph after midnight. Winds could gust as high as 38 mph.
Friday
Mostly sunny, with a high near 57. West wind 10 to 17 mph, with gusts as high as 30 mph.
Friday Night
Partly cloudy, with a low around 36. Northwest wind around 6 mph becoming light and variable.
Saturday
Partly sunny, with a high near 63. East wind 7 to 10 mph, with gusts as high as 21 mph.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 53. Southeast wind 10 to 13 mph, with gusts as high as 24 mph.
Sunday
Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 90%.
Sunday Night
Rain and snow before 1am, then a chance of snow. Some thunder is also possible. Low around 20. Blustery. Chance of precipitation is 80%.
Monday
A 20 percent chance of snow before 1pm. Partly sunny, with a high near 26. Blustery.
Monday Night
Mostly clear, with a low around 11.
Tuesday
Mostly sunny, with a high near 32.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 53.
Wednesday Night
Partly cloudy, with a low around 37.
Thursday
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:
10:36 pm CDT Mar 12, 2026
Forecast Valid:
10pm CDT Mar 12, 2026-6pm CDT Mar 19, 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