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

32°F

0°C

Humidity 100%
Wind Speed Calm
Barometer 30.04 in (1017.5 mb)
Dewpoint 32°F (0°C)
Visibility 3.00 mi
Last update 16 Feb 6:54 am CST
Extended Forecast for

Winfield MO

  • Washington's Birthday

    Washington's Birthday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 66. Light and variable wind becoming south 5 to 10 mph in the morning.

    High: 66 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 43. South wind around 6 mph.

    Low: 43 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 66. South wind 6 to 14 mph, with gusts as high as 25 mph.

    High: 66 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 55. South wind 13 to 17 mph, with gusts as high as 31 mph.

    Low: 55 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Sunny, with a high near 71. West wind 7 to 15 mph, with gusts as high as 26 mph.

    High: 71 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71. Chance of precipitation is 30%.

    High: 71 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 35.

    Low: 35 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of showers after noon. Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

Detailed Forecast

Washington's Birthday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 66. Light and variable wind becoming south 5 to 10 mph in the morning.
Tonight
Partly cloudy, with a low around 43. South wind around 6 mph.
Tuesday
Mostly cloudy, with a high near 66. South wind 6 to 14 mph, with gusts as high as 25 mph.
Tuesday Night
A 20 percent chance of showers after midnight. Mostly cloudy, then gradually becoming mostly clear, with a low around 55. South wind 13 to 17 mph, with gusts as high as 31 mph.
Wednesday
Sunny, with a high near 71. West wind 7 to 15 mph, with gusts as high as 26 mph.
Wednesday Night
Partly cloudy, with a low around 43.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after noon. Mostly sunny, with a high near 71. Chance of precipitation is 30%.
Thursday Night
Mostly clear, with a low around 35.
Friday
A 20 percent chance of showers after noon. Mostly sunny, with a high near 49.
Friday Night
A 20 percent chance of showers. Partly cloudy, with a low around 30.
Saturday
A 30 percent chance of showers. Mostly sunny, with a high near 49.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 27.
Sunday
Sunny, with a high near 42.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winfield MO
 38.99°N 90.73°W (Elev. 433 ft)
Last Update:
6:01 am CST Feb 16, 2026
Forecast Valid:
6am CST Feb 16, 2026-6pm CST Feb 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation