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

82°F

28°C

Humidity 43%
Wind Speed S 6 mph
Barometer 29.92 in (1012.8 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 11 Oct 5:54 pm CDT
Extended Forecast for

Winfield MO

  • Tonight

    Tonight: Partly cloudy, with a low around 64. Southeast wind 3 to 5 mph.

    Low: 64 °F

    Partly Cloudy

  • Columbus Day

    Columbus Day: Sunny, with a high near 94. Southwest wind 6 to 14 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 71. South wind around 8 mph.

    Low: 71 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92. Southwest wind 6 to 9 mph.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Light and variable wind becoming southwest around 5 mph. Chance of precipitation is 60%.

    Low: 70 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.

    High: 82 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Cloudy, with a low around 63. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 53.

    Low: 53 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Partly cloudy, with a low around 64. Southeast wind 3 to 5 mph.
Columbus Day
Sunny, with a high near 94. Southwest wind 6 to 14 mph, with gusts as high as 21 mph.
Monday Night
Mostly clear, with a low around 71. South wind around 8 mph.
Tuesday
Sunny, with a high near 92. Southwest wind 6 to 9 mph.
Tuesday Night
A slight chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 70. Light and variable wind becoming southwest around 5 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.
Wednesday Night
Showers likely and possibly a thunderstorm. Cloudy, with a low around 63. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 53.
Friday
Partly sunny, with a high near 66. Breezy.
Friday Night
Partly cloudy, with a low around 39.
Saturday
Sunny, with a high near 62.
Saturday Night
Clear, with a low around 37.
Sunday
Sunny, with a high near 69.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Winfield MO
 38.99°N 90.73°W (Elev. 433 ft)
Last Update:
5:41 pm CDT Oct 11, 2026
Forecast Valid:
6pm CDT Oct 11, 2026-6pm CDT Oct 18, 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