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.

Light Snow and Breezy

22°F

-6°C

Humidity 66%
Wind Speed W 25 G 40 mph
Barometer 29.99 in (1015.9 mb)
Dewpoint 12°F (-11°C)
Visibility 9.00 mi
Wind Chill5°F (-15°C)
Last update 16 Mar 11:54 am CDT
Extended Forecast for

4 Miles SSW Hardin IL

  • This Afternoon

    This Afternoon: A chance of flurries. Mostly cloudy, with a high near 27. Blustery, with a northwest wind 14 to 21 mph, with gusts as high as 34 mph.

    High: 27 °F

    Chance
    Flurries and
    Blustery

  • Tonight

    Tonight: Mostly cloudy, with a low around 13. Northwest wind 11 to 15 mph, with gusts as high as 25 mph.

    Low: 13 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 34. Northwest wind around 7 mph becoming south in the afternoon.

    High: 34 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: A chance of snow before 2am, then a slight chance of rain and snow between 2am and 4am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 30. Southeast wind 7 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    Low: 30 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 61. South wind 7 to 10 mph becoming west in the afternoon.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of flurries. Mostly cloudy, with a high near 27. Blustery, with a northwest wind 14 to 21 mph, with gusts as high as 34 mph.
Tonight
Mostly cloudy, with a low around 13. Northwest wind 11 to 15 mph, with gusts as high as 25 mph.
Tuesday
Increasing clouds, with a high near 34. Northwest wind around 7 mph becoming south in the afternoon.
Tuesday Night
A chance of snow before 2am, then a slight chance of rain and snow between 2am and 4am, then a slight chance of snow after 4am. Mostly cloudy, with a low around 30. Southeast wind 7 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Wednesday
Mostly sunny, with a high near 61. South wind 7 to 10 mph becoming west in the afternoon.
Wednesday Night
Partly cloudy, with a low around 41.
Thursday
Sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Mostly sunny, with a high near 73.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Sunny, with a high near 68.
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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:
12:11 pm CDT Mar 16, 2026
Forecast Valid:
12pm CDT Mar 16, 2026-6pm CDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation