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

33°F

1°C

Humidity 85%
Wind Speed NE 3 mph
Barometer 30.22 in (1023.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 13 Nov 5:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Today

    Today: Mostly sunny, with a high near 66. Calm wind becoming south 5 to 9 mph in the morning.

    High: 66 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 46. South wind around 7 mph.

    Low: 46 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 76. Southwest wind 5 to 11 mph, with gusts as high as 20 mph.

    High: 76 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 55. Southwest wind 6 to 9 mph.

    Low: 55 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 77. Southwest wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.

    High: 77 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Sunday Night

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

    Low: 37 °F

    Mostly Clear

  • Monday

    Monday: A 30 percent chance of rain after noon. Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny
    then Chance
    Rain

Detailed Forecast

Today
Mostly sunny, with a high near 66. Calm wind becoming south 5 to 9 mph in the morning.
Tonight
Partly cloudy, with a low around 46. South wind around 7 mph.
Friday
Sunny, with a high near 76. Southwest wind 5 to 11 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 55. Southwest wind 6 to 9 mph.
Saturday
Partly sunny, with a high near 77. Southwest wind 9 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 60.
Sunday Night
Mostly clear, with a low around 37.
Monday
A 30 percent chance of rain after noon. Mostly sunny, with a high near 60.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 42.
Tuesday
A 20 percent chance of rain. Mostly sunny, with a high near 61.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 40.
Wednesday
A 30 percent chance of rain. Partly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.94°N 90.45°W (Elev. 427 ft)
Last Update:
5:11 am CST Nov 13, 2025
Forecast Valid:
7am CST Nov 13, 2025-6pm CST Nov 19, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation