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.

Overcast

47°F

8°C

Humidity 83%
Wind Speed W 20 G 28 mph
Barometer 29.97 in (1014.8 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 7 Mar 12:54 pm CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • This Afternoon

    This Afternoon: Mostly cloudy, with a steady temperature around 47. West wind 13 to 15 mph, with gusts as high as 24 mph.

    High: 47 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 34. Northwest wind 5 to 10 mph becoming light west after midnight.

    Low: 34 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 67. Southwest wind 5 to 11 mph.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43. South wind around 9 mph.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 78. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 82. Chance of precipitation is 60%.

    High: 82 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%.

    Low: 48 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before noon, then a chance of rain. High near 62. Chance of precipitation is 90%.

    High: 62 °F

    Rain then
    Chance Rain

Detailed Forecast

This Afternoon
Mostly cloudy, with a steady temperature around 47. West wind 13 to 15 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 34. Northwest wind 5 to 10 mph becoming light west after midnight.
Sunday
Sunny, with a high near 67. Southwest wind 5 to 11 mph.
Sunday Night
Clear, with a low around 43. South wind around 9 mph.
Monday
Sunny, with a high near 78. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 56.
Tuesday
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm before noon, then a chance of rain. High near 62. Chance of precipitation is 90%.
Wednesday Night
A 20 percent chance of rain before midnight. Mostly clear, with a low around 30.
Thursday
Sunny, with a high near 55.
Thursday Night
Mostly cloudy, with a low around 41.
Friday
Partly sunny, with a high near 67.
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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:
12:25 pm CST Mar 7, 2026
Forecast Valid:
1pm CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation