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.

Light Rain

47°F

8°C

Humidity 97%
Wind Speed E 8 mph
Barometer 30.07 in (1018.3 mb)
Dewpoint 46°F (8°C)
Visibility 8.00 mi
Wind Chill43°F (6°C)
Last update 4 Mar 3:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Overnight

    Overnight: A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 45. Northeast wind around 5 mph.

    Low: 45 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms before 4pm, then showers likely. Patchy fog between 1pm and 2pm. High near 61. East wind 3 to 6 mph. Chance of precipitation is 90%.

    High: 61 °F

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

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Patchy fog after midnight. Low around 48. East wind around 6 mph becoming west after midnight. Chance of precipitation is 80%.

    Low: 48 °F

    Showers and
    Patchy Fog

  • Thursday

    Thursday: A 40 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 67. West wind 5 to 8 mph becoming light and variable in the afternoon.

    High: 67 °F

    Chance
    Showers

  • Thursday Night

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

    Low: 52 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

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

    High: 79 °F

    Chance
    Showers

  • Friday Night

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

    Low: 51 °F

    Showers
    Likely then
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers before noon. Partly sunny, with a high near 63.

    High: 63 °F

    Chance
    Showers then
    Mostly Sunny

  • Saturday Night

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

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Overnight
A 50 percent chance of showers and thunderstorms. Cloudy, with a low around 45. Northeast wind around 5 mph.
Wednesday
Showers and thunderstorms before 4pm, then showers likely. Patchy fog between 1pm and 2pm. High near 61. East wind 3 to 6 mph. Chance of precipitation is 90%.
Wednesday Night
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Patchy fog after midnight. Low around 48. East wind around 6 mph becoming west after midnight. Chance of precipitation is 80%.
Thursday
A 40 percent chance of showers, mainly before noon. Mostly cloudy, with a high near 67. West wind 5 to 8 mph becoming light and variable in the afternoon.
Thursday Night
A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Mostly cloudy, with a low around 52. Light south wind increasing to 5 to 9 mph in the evening. Chance of precipitation is 60%.
Friday
A 50 percent chance of showers. Partly sunny, with a high near 79.
Friday Night
Showers and possibly a thunderstorm. Low around 51. Chance of precipitation is 90%.
Saturday
A 40 percent chance of showers before noon. Partly sunny, 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 showers and thunderstorms. Mostly clear, with a low around 55.
Tuesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 75. Chance of precipitation is 70%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.94°N 90.45°W (Elev. 427 ft)
Last Update:
12:51 am CST Mar 4, 2026
Forecast Valid:
4am CST Mar 4, 2026-6pm CDT Mar 10, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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