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

40°F

4°C

Humidity 60%
Wind Speed E 8 mph
Barometer 30.09 in (1019.0 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 14 Mar 4:54 am CDT
Extended Forecast for

Hardin IL

  • Today

    Today: Mostly sunny, with a high near 62. East wind 6 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 24 mph.

    High: 62 °F

    Mostly Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 53. Southeast wind 9 to 14 mph, with gusts as high as 26 mph.

    Low: 53 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 68. Breezy, with a south wind 15 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 90%.

    High: 68 °F

    Chance Rain
    then Rain and
    Breezy

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then snow likely after 1am. Low around 19. Blustery, with a northwest wind 20 to 25 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 27. Blustery, with a northwest wind 20 to 23 mph, with gusts as high as 43 mph.

    High: 27 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 11.

    Low: 11 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.

    Low: 28 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 62. East wind 6 to 13 mph becoming southeast in the afternoon. Winds could gust as high as 24 mph.
Tonight
Increasing clouds, with a low around 53. Southeast wind 9 to 14 mph, with gusts as high as 26 mph.
Sunday
Rain, mainly after 1pm. High near 68. Breezy, with a south wind 15 to 21 mph, with gusts as high as 38 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then snow likely after 1am. Low around 19. Blustery, with a northwest wind 20 to 25 mph, with gusts as high as 46 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Monday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 27. Blustery, with a northwest wind 20 to 23 mph, with gusts as high as 43 mph.
Monday Night
Partly cloudy, with a low around 11.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
A chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Wednesday
Mostly sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 37.
Thursday
Sunny, with a high near 71.
Thursday Night
Partly cloudy, with a low around 46.
Friday
Sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hardin IL
 39.16°N 90.61°W (Elev. 427 ft)
Last Update:
4:41 am CDT Mar 14, 2026
Forecast Valid:
5am CDT Mar 14, 2026-6pm CDT Mar 20, 2026
 
Forecast Discussion
 
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Additional Resources

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