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

39°F

4°C

Humidity 60%
Wind Speed E 7 mph
Barometer 30.11 in (1019.4 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 14 Mar 3:54 am CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • Today

    Today: Mostly sunny, with a high near 62. Southeast wind 7 to 15 mph, with gusts as high as 23 mph.

    High: 62 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 51. Southeast wind 13 to 15 mph, with gusts as high as 24 mph.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: Rain, mainly after 1pm. High near 69. Breezy, with a south wind 17 to 24 mph, with gusts as high as 38 mph. Chance of precipitation is 90%.

    High: 69 °F

    Breezy.
    Chance Rain
    then Rain

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Low around 18. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 18 °F

    Rain/Snow and
    Blustery

  • Monday

    Monday: A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 27. Blustery, with a northwest wind 23 to 26 mph, with gusts as high as 41 mph.

    High: 27 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Partly cloudy, with a low around 11.

    Low: 11 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.

    Low: 28 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday

    Wednesday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 62. Southeast wind 7 to 15 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 51. Southeast wind 13 to 15 mph, with gusts as high as 24 mph.
Sunday
Rain, mainly after 1pm. High near 69. Breezy, with a south wind 17 to 24 mph, with gusts as high as 38 mph. Chance of precipitation is 90%.
Sunday Night
Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Low around 18. Blustery, with a northwest wind 22 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Monday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 27. Blustery, with a northwest wind 23 to 26 mph, with gusts as high as 41 mph.
Monday Night
Partly cloudy, with a low around 11.
Tuesday
Mostly sunny, with a high near 37.
Tuesday Night
A chance of snow before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 28. Chance of precipitation is 30%.
Wednesday
Partly sunny, with a high near 64.
Wednesday Night
Mostly clear, with a low around 37.
Thursday
Sunny, with a high near 70.
Thursday Night
Partly cloudy, with a low around 44.
Friday
Sunny, with a high near 71.
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:
4:41 am CDT Mar 14, 2026
Forecast Valid:
4am CDT Mar 14, 2026-6pm CDT Mar 20, 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