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.

Fair

58°F

14°C

Humidity 32%
Wind Speed W 20 G 31 mph
Barometer 29.92 in (1012.9 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 13 Mar 11:54 am CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 60. West wind 15 to 18 mph, with gusts as high as 26 mph.

    High: 60 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 33. Northwest wind 5 to 7 mph becoming light and variable.

    Low: 33 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 62. East wind 7 to 15 mph, with gusts as high as 22 mph.

    High: 62 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 51. Southeast wind around 14 mph, with gusts as high as 23 mph.

    Low: 51 °F

    Mostly Cloudy

  • Sunday

    Sunday: Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 69. Breezy, with a south wind 17 to 22 mph, with gusts as high as 39 mph. Chance of precipitation is 90%.

    High: 69 °F

    Breezy.
    Chance Rain
    then Showers

  • Sunday Night

    Sunday Night: Rain before 10pm, then snow, possibly mixed with rain between 10pm and 1am, then a chance of snow after 1am. Some thunder is also possible. Low around 19. Breezy. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 19 °F

    Rain/Snow and
    Breezy

  • Monday

    Monday: A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery.

    High: 29 °F

    Chance Snow
    and Blustery

  • Monday Night

    Monday Night: Mostly clear, with a low around 12. Blustery.

    Low: 12 °F

    Mostly Clear
    and Blustery
    then Mostly
    Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 60. West wind 15 to 18 mph, with gusts as high as 26 mph.
Tonight
Partly cloudy, with a low around 33. Northwest wind 5 to 7 mph becoming light and variable.
Saturday
Mostly sunny, with a high near 62. East wind 7 to 15 mph, with gusts as high as 22 mph.
Saturday Night
Mostly cloudy, with a low around 51. Southeast wind around 14 mph, with gusts as high as 23 mph.
Sunday
Rain, mainly between 1pm and 4pm, then showers and possibly a thunderstorm after 4pm. High near 69. Breezy, with a south wind 17 to 22 mph, with gusts as high as 39 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. Some thunder is also possible. Low around 19. Breezy. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Monday
A 30 percent chance of snow before 1pm. Mostly cloudy, with a high near 29. Blustery.
Monday Night
Mostly clear, with a low around 12. Blustery.
Tuesday
Mostly sunny, with a high near 36.
Tuesday Night
A slight chance of rain and snow after 1am. Mostly cloudy, with a low around 26. Chance of precipitation is 20%.
Wednesday
Partly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 38.
Thursday
Sunny, with a high near 70.
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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:
11:41 am CDT Mar 13, 2026
Forecast Valid:
12pm CDT Mar 13, 2026-6pm CDT Mar 19, 2026
 
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