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.

Fair

82°F

28°C

Humidity 55%
Wind Speed SE 5 mph
Barometer 30.08 in (1018.3 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 6 Oct 11:54 am CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • This Afternoon

    This Afternoon: A slight chance of showers between 2pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Southeast wind around 7 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 63. Southeast wind 5 to 7 mph becoming calm after midnight.

    Low: 63 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 74. North wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    T-storms then
    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50. North wind 6 to 10 mph.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 74. Northeast wind 6 to 10 mph.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 45.

    Low: 45 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers between 2pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 84. Southeast wind around 7 mph. Chance of precipitation is 20%.
Tonight
A 20 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 63. Southeast wind 5 to 7 mph becoming calm after midnight.
Tuesday
A slight chance of showers and thunderstorms before 10am, then a slight chance of showers between 10am and 1pm. Mostly cloudy, with a high near 74. North wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 50. North wind 6 to 10 mph.
Wednesday
Sunny, with a high near 74. Northeast wind 6 to 10 mph.
Wednesday Night
Clear, with a low around 45.
Thursday
Sunny, with a high near 74.
Thursday Night
Mostly clear, with a low around 46.
Friday
Mostly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 53.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.93°N 90.42°W (Elev. 427 ft)
Last Update:
12:06 pm CDT Oct 6, 2025
Forecast Valid:
12pm CDT Oct 6, 2025-6pm CDT Oct 12, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation