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.

Fog/Mist

51°F

11°C

Humidity 92%
Wind Speed SE 6 mph
Barometer 29.86 in (1011.0 mb)
Dewpoint 49°F (9°C)
Visibility 6.00 mi
Wind Chill49°F (9°C)
Last update 24 Nov 8:54 pm CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Tonight

    Tonight: Rain, mainly before 2am. Patchy fog after 10pm. Low around 50. Southeast wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 100%.

    Low: 50 °F

    Rain and
    Patchy Fog

  • Tuesday

    Tuesday: Patchy fog before 11am. Otherwise, cloudy, with a high near 58. Calm wind becoming west 5 to 9 mph in the morning.

    High: 58 °F

    Patchy Fog
    then Cloudy

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 34. West wind 8 to 17 mph, with gusts as high as 33 mph.

    Low: 34 °F

    Chance Rain
    then Partly
    Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 45. Breezy, with a west wind 13 to 20 mph, with gusts as high as 31 mph.

    High: 45 °F

    Mostly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 26. West wind 7 to 10 mph.

    Low: 26 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Sunny, with a high near 41.

    High: 41 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of snow before midnight, then snow likely, possibly mixed with rain. Cloudy, with a low around 30. Chance of precipitation is 60%.

    Low: 30 °F

    Chance Snow
    then
    Rain/Snow
    Likely

Detailed Forecast

Tonight
Rain, mainly before 2am. Patchy fog after 10pm. Low around 50. Southeast wind 5 to 8 mph becoming calm after midnight. Chance of precipitation is 100%.
Tuesday
Patchy fog before 11am. Otherwise, cloudy, with a high near 58. Calm wind becoming west 5 to 9 mph in the morning.
Tuesday Night
A 30 percent chance of rain, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 34. West wind 8 to 17 mph, with gusts as high as 33 mph.
Wednesday
Mostly sunny, with a high near 45. Breezy, with a west wind 13 to 20 mph, with gusts as high as 31 mph.
Wednesday Night
Partly cloudy, with a low around 26. West wind 7 to 10 mph.
Thanksgiving Day
Sunny, with a high near 41.
Thursday Night
Mostly clear, with a low around 21.
Friday
Partly sunny, with a high near 39.
Friday Night
A chance of snow before midnight, then snow likely, possibly mixed with rain. Cloudy, with a low around 30. Chance of precipitation is 60%.
Saturday
Rain likely, possibly mixed with snow. Cloudy, with a high near 40. Chance of precipitation is 70%.
Saturday Night
A 50 percent chance of rain. Cloudy, with a low around 30.
Sunday
A 50 percent chance of rain. Cloudy, with a high near 43.
Sunday Night
A 50 percent chance of rain. Cloudy, with a low around 31.
Monday
A 40 percent chance of rain. Mostly cloudy, with a high near 45.
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
 38.93°N 90.42°W (Elev. 427 ft)
Last Update:
7:36 pm CST Nov 24, 2025
Forecast Valid:
9pm CST Nov 24, 2025-6pm CST Dec 1, 2025
 
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