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

82°F

28°C

Humidity 44%
Wind Speed SE 13 mph
Barometer 30.00 in (1015.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 16 Oct 3:54 pm CDT
Extended Forecast for

3 Miles SW Hardin IL

  • Tonight

    Tonight: Increasing clouds, with a low around 62. Southeast wind 5 to 7 mph.

    Low: 62 °F

    Increasing
    Clouds

  • Friday

    Friday: Partly sunny, with a high near 83. South wind 6 to 10 mph, with gusts as high as 21 mph.

    High: 83 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 65. South wind around 8 mph. Chance of precipitation is 30%.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 77. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    High: 77 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 49. Southwest wind 7 to 13 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Sunday

    Sunday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 45.

    Low: 45 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Monday Night

    Monday Night: A 40 percent chance of showers. Partly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 62. Southeast wind 5 to 7 mph.
Friday
Partly sunny, with a high near 83. South wind 6 to 10 mph, with gusts as high as 21 mph.
Friday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 65. South wind around 8 mph. Chance of precipitation is 30%.
Saturday
Showers and possibly a thunderstorm. High near 77. Southwest wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Saturday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 4am, then a chance of showers after 4am. Mostly cloudy, with a low around 49. Southwest wind 7 to 13 mph becoming northwest after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 70%.
Sunday
Sunny, with a high near 64.
Sunday Night
Clear, with a low around 45.
Monday
Sunny, with a high near 73.
Monday Night
A 40 percent chance of showers. Partly cloudy, with a low around 49.
Tuesday
A 20 percent chance of showers before 1pm. Sunny, with a high near 63.
Tuesday Night
Mostly clear, with a low around 41.
Wednesday
Sunny, with a high near 65.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Mostly sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SW Hardin IL
 39.12°N 90.67°W (Elev. 525 ft)
Last Update:
4:36 pm CDT Oct 16, 2025
Forecast Valid:
4pm CDT Oct 16, 2025-6pm CDT Oct 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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