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

67°F

19°C

Humidity 84%
Wind Speed NE 5 mph
Barometer 30.03 in (1016.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 30 Jul 5:54 am CDT
Extended Forecast for

Hardin ILSimilar City Names

  • Today

    Today: Sunny, with a high near 87. Calm wind becoming east around 6 mph in the morning.

    High: 87 °F

    Sunny

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 67. East wind 5 to 7 mph.

    Low: 67 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Showers and thunderstorms. High near 83. South wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.

    High: 83 °F

    Showers then
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm after 1am. Low around 67. Southeast wind 6 to 11 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.

    Low: 67 °F

    T-storms

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. North wind 9 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Partly cloudy, with a low around 64.

    Low: 64 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 87. Calm wind becoming east around 6 mph in the morning.
Tonight
A 20 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 67. East wind 5 to 7 mph.
Friday
Showers and thunderstorms. High near 83. South wind 8 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%.
Friday Night
Showers and thunderstorms before 1am, then showers likely and possibly a thunderstorm after 1am. Low around 67. Southeast wind 6 to 11 mph becoming west after midnight. Winds could gust as high as 23 mph. Chance of precipitation is 90%.
Saturday
Showers likely, with thunderstorms also possible after 1pm. Mostly cloudy, with a high near 79. North wind 9 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 60%.
Saturday Night
A 20 percent chance of showers before 1am. Partly cloudy, with a low around 64.
Sunday
Sunny, with a high near 83.
Sunday Night
Mostly clear, with a low around 64.
Monday
Sunny, with a high near 85.
Monday Night
Mostly clear, with a low around 65.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 87.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hardin ILSimilar City Names
 39.14°N 90.61°W (Elev. 427 ft)
Last Update:
6:06 am CDT Jul 30, 2026
Forecast Valid:
6am CDT Jul 30, 2026-6pm CDT Aug 5, 2026
 
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Additional Resources

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High Temperature

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Chance of Precipitation