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

53°F

12°C

Humidity 83%
Wind Speed E 8 mph
Barometer 30.04 in (1016.8 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 10 Oct 5:54 am CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • Today

    Today: Mostly cloudy, with a high near 83. East wind 5 to 9 mph.

    High: 83 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 53. East wind 5 to 8 mph becoming calm after midnight.

    Low: 53 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62. Southeast wind 5 to 7 mph becoming southwest after midnight.

    Low: 62 °F

    Mostly Clear

  • Columbus Day

    Columbus Day: Sunny, with a high near 94. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 61.

    Low: 61 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 80. Chance of precipitation is 70%.

    High: 80 °F

    Showers
    Likely

Detailed Forecast

Today
Mostly cloudy, with a high near 83. East wind 5 to 9 mph.
Tonight
Partly cloudy, with a low around 53. East wind 5 to 8 mph becoming calm after midnight.
Sunday
Sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 62. Southeast wind 5 to 7 mph becoming southwest after midnight.
Columbus Day
Sunny, with a high near 94. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny, with a high near 90.
Tuesday Night
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly clear, with a low around 61.
Wednesday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 80. Chance of precipitation is 70%.
Wednesday Night
A chance of showers, with thunderstorms also possible after 1am. Mostly cloudy, with a low around 58. Chance of precipitation is 50%.
Thursday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 78. Chance of precipitation is 60%.
Thursday Night
A 30 percent chance of showers. Partly cloudy, with a low around 52.
Friday
A 20 percent chance of showers. Mostly sunny, with a high near 70.
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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:
5:16 am CDT Oct 10, 2026
Forecast Valid:
6am CDT Oct 10, 2026-6pm CDT Oct 16, 2026
 
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