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

37°F

3°C

Humidity 65%
Wind Speed NW 6 mph
Barometer 30.30 in (1026.1 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 12 Mar 2:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

Wind Advisory March 12, 10:00pm until March 13, 11:00am
Click here for hazard details and duration
Wind Advisory

  • Overnight

    Overnight: Clear, with a low around 31. Northwest wind around 6 mph.

    Low: 31 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 54. West wind 5 to 13 mph, with gusts as high as 21 mph.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45. Breezy, with a south wind 13 to 21 mph, with gusts as high as 38 mph.

    Low: 45 °F

    Partly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Friday

    Friday: Partly sunny, with a high near 57. West wind 16 to 18 mph, with gusts as high as 30 mph.

    High: 57 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 35. Northwest wind 5 to 7 mph becoming east after midnight.

    Low: 35 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Sunday

    Sunday: Rain and possibly a thunderstorm. High near 65. Chance of precipitation is 90%.

    High: 65 °F

    Rain

  • Sunday Night

    Sunday Night: Rain and snow likely before 1am, then a chance of snow. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 60%.

    Low: 21 °F

    Rain/Snow
    Likely and
    Blustery

Detailed Forecast

Overnight
Clear, with a low around 31. Northwest wind around 6 mph.
Thursday
Sunny, with a high near 54. West wind 5 to 13 mph, with gusts as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 45. Breezy, with a south wind 13 to 21 mph, with gusts as high as 38 mph.
Friday
Partly sunny, with a high near 57. West wind 16 to 18 mph, with gusts as high as 30 mph.
Friday Night
Mostly cloudy, with a low around 35. Northwest wind 5 to 7 mph becoming east after midnight.
Saturday
Partly sunny, with a high near 61.
Saturday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 53.
Sunday
Rain and possibly a thunderstorm. High near 65. Chance of precipitation is 90%.
Sunday Night
Rain and snow likely before 1am, then a chance of snow. Mostly cloudy, with a low around 21. Blustery. Chance of precipitation is 60%.
Monday
Mostly sunny, with a high near 31. Blustery.
Monday Night
Mostly clear, with a low around 14.
Tuesday
Partly sunny, with a high near 37.
Tuesday Night
A slight chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 20%.
Wednesday
Mostly cloudy, with a high near 57.
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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:
3:06 am CDT Mar 12, 2026
Forecast Valid:
3am CDT Mar 12, 2026-6pm CDT Mar 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