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

47°F

8°C

Humidity 66%
Wind Speed NE 5 mph
Barometer 29.62 in (1002.8 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 18 Feb 10:54 pm CST
Extended Forecast for

Winfield MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before noon. Partly sunny, with a high near 71. Light and variable wind becoming southwest 12 to 17 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 60%.

    High: 71 °F

    Showers
    Likely then
    Isolated
    T-storms

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 33. West wind 10 to 17 mph, with gusts as high as 30 mph.

    Low: 33 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 48. West wind 6 to 15 mph, with gusts as high as 26 mph.

    High: 48 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 28. Northwest wind 3 to 6 mph.

    Low: 28 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of rain and snow after noon. Mostly sunny, with a high near 44. Chance of precipitation is 20%.

    High: 44 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 23.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 39.

    High: 39 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 18.

    Low: 18 °F

    Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 45. Calm wind.
Thursday
Showers and thunderstorms likely, mainly before noon. Partly sunny, with a high near 71. Light and variable wind becoming southwest 12 to 17 mph in the morning. Winds could gust as high as 30 mph. Chance of precipitation is 60%.
Thursday Night
Mostly clear, with a low around 33. West wind 10 to 17 mph, with gusts as high as 30 mph.
Friday
Sunny, with a high near 48. West wind 6 to 15 mph, with gusts as high as 26 mph.
Friday Night
Partly cloudy, with a low around 28. Northwest wind 3 to 6 mph.
Saturday
A slight chance of rain and snow after noon. Mostly sunny, with a high near 44. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 23.
Sunday
Sunny, with a high near 39.
Sunday Night
Clear, with a low around 18.
Monday
Sunny, with a high near 38.
Monday Night
Mostly clear, with a low around 21.
Tuesday
Mostly sunny, with a high near 51.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 57.
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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:
9:36 pm CST Feb 18, 2026
Forecast Valid:
11pm CST Feb 18, 2026-6pm CST Feb 25, 2026
 
Forecast Discussion
 
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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