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 90%
Wind Speed NE 9 mph
Barometer 30.10 in (1019.1 mb)
Dewpoint 44°F (7°C)
Visibility 7.00 mi
Wind Chill43°F (6°C)
Last update 3 Mar 11:54 pm CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Cloudy, with a low around 45. Northeast wind 5 to 7 mph. Chance of precipitation is 60%.

    Low: 45 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. Patchy fog between 1pm and 2pm. High near 60. Northeast wind around 5 mph becoming light and variable. Chance of precipitation is 90%.

    High: 60 °F

    Chance
    T-storms and
    Patchy Fog
    then Showers
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after midnight. Low around 48. Northeast wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 80%.

    Low: 48 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: A chance of showers, mainly before noon, then a slight chance of rain after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 66. West wind 5 to 8 mph becoming light and variable in the afternoon. Chance of precipitation is 40%.

    High: 66 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of rain and thunderstorms before midnight, then rain likely and possibly a thunderstorm between midnight and 3am, then rain likely after 3am. Mostly cloudy, with a low around 52. Calm wind becoming south 5 to 9 mph in the evening. Chance of precipitation is 60%.

    Low: 52 °F

    Chance Rain
    then Rain
    Likely

  • Friday

    Friday: A 50 percent chance of rain. Partly sunny, with a high near 79.

    High: 79 °F

    Chance Rain

  • Friday Night

    Friday Night: Rain and possibly a thunderstorm. Low around 51. Chance of precipitation is 90%.

    Low: 51 °F

    Rain Likely
    then Rain

  • Saturday

    Saturday: A 40 percent chance of rain before noon. Mostly cloudy, with a high near 63.

    High: 63 °F

    Chance Rain
    then Partly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms between 1am and 3am, then showers likely and possibly a thunderstorm after 3am. Cloudy, with a low around 45. Northeast wind 5 to 7 mph. Chance of precipitation is 60%.
Wednesday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after noon. Patchy fog between 1pm and 2pm. High near 60. Northeast wind around 5 mph becoming light and variable. Chance of precipitation is 90%.
Wednesday Night
Showers and thunderstorms before 4am, then showers likely and possibly a thunderstorm between 4am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog after midnight. Low around 48. Northeast wind 5 to 7 mph becoming west after midnight. Chance of precipitation is 80%.
Thursday
A chance of showers, mainly before noon, then a slight chance of rain after 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 66. West wind 5 to 8 mph becoming light and variable in the afternoon. Chance of precipitation is 40%.
Thursday Night
A chance of rain and thunderstorms before midnight, then rain likely and possibly a thunderstorm between midnight and 3am, then rain likely after 3am. Mostly cloudy, with a low around 52. Calm wind becoming south 5 to 9 mph in the evening. Chance of precipitation is 60%.
Friday
A 50 percent chance of rain. Partly sunny, with a high near 79.
Friday Night
Rain and possibly a thunderstorm. Low around 51. Chance of precipitation is 90%.
Saturday
A 40 percent chance of rain before noon. Mostly cloudy, with a high near 63.
Saturday Night
Partly cloudy, with a low around 36.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 44.
Monday
Sunny, with a high near 77.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly clear, with a low around 55.
Tuesday
Rain and thunderstorms likely. Partly sunny, with a high near 75. Chance of precipitation is 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:
12:31 am CST Mar 4, 2026
Forecast Valid:
12am CST Mar 4, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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