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.

Partly Cloudy

78°F

26°C

Humidity 90%
Wind Speed NW 5 mph
Barometer 30.02 in (1016.0 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 30 Jul 10:54 pm CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. North wind around 6 mph.

    Low: 71 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Cloudy, with a high near 78. Northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    High: 78 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 63. North wind 8 to 13 mph.

    Low: 63 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 80. Northeast wind 8 to 13 mph, with gusts as high as 20 mph.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 59. Northeast wind 6 to 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 71. North wind around 6 mph.
Thursday
A chance of showers and thunderstorms. Cloudy, with a high near 78. Northeast wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Thursday Night
Partly cloudy, with a low around 63. North wind 8 to 13 mph.
Friday
Mostly sunny, with a high near 80. Northeast wind 8 to 13 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 59. Northeast wind 6 to 10 mph.
Saturday
Sunny, with a high near 79.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Sunny, with a high near 82.
Sunday Night
Partly cloudy, with a low around 64.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 67.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Mostly sunny, with a high near 88.
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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:
10:26 pm CDT Jul 30, 2025
Forecast Valid:
11pm CDT Jul 30, 2025-6pm CDT Aug 6, 2025
 
Forecast Discussion
 
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Additional Resources

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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