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

19°F

-7°C

Humidity 71%
Wind Speed S 8 mph
Barometer 30.24 in (1024.5 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill9°F (-13°C)
Last update 24 Feb 1:54 am CST
Extended Forecast for

5 Miles NE Hardin IL

  • Overnight

    Overnight: Partly cloudy, with a low around 20. South wind 5 to 8 mph.

    Low: 20 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 57. Breezy, with a south wind 9 to 14 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 34 mph.

    High: 57 °F

    Mostly Cloudy
    then Cloudy
    and Breezy

  • Tuesday Night

    Tuesday Night: Cloudy, then gradually becoming partly cloudy, with a low around 31. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.

    Low: 31 °F

    Decreasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, with a high near 50. Calm wind becoming north around 5 mph in the afternoon.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 34. East wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 34 °F

    Rain Likely

  • Thursday

    Thursday: A slight chance of rain, mixing with snow after 9am, then gradually ending. Partly sunny, with a high near 49. Chance of precipitation is 20%.

    High: 49 °F

    Slight Chance
    Rain/Snow
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 20. South wind 5 to 8 mph.
Tuesday
Mostly cloudy, with a high near 57. Breezy, with a south wind 9 to 14 mph becoming southwest 15 to 20 mph in the afternoon. Winds could gust as high as 34 mph.
Tuesday Night
Cloudy, then gradually becoming partly cloudy, with a low around 31. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Wednesday
Partly sunny, with a high near 50. Calm wind becoming north around 5 mph in the afternoon.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 34. East wind 5 to 7 mph. Chance of precipitation is 60%.
Thursday
A slight chance of rain, mixing with snow after 9am, then gradually ending. Partly sunny, with a high near 49. Chance of precipitation is 20%.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 37.
Saturday
Sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 28.
Sunday
A chance of rain and snow. Partly sunny, with a high near 42. Chance of precipitation is 30%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 40%.
Monday
A chance of rain and snow. Partly sunny, with a high near 46. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NE Hardin IL
 39.18°N 90.55°W (Elev. 499 ft)
Last Update:
12:26 am CST Feb 24, 2026
Forecast Valid:
2am CST Feb 24, 2026-6pm CST Mar 2, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation