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

84°F

29°C

Humidity 49%
Wind Speed NW 7 mph
Barometer 30.00 in (1015.3 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 19 Jun 6:54 pm CDT
Extended Forecast for

Winfield MO

  • Tonight

    Tonight: Mostly clear, with a low around 65. Light and variable wind.

    Low: 65 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92. Heat index values as high as 101. South wind 5 to 11 mph.

    High: 92 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 75. South wind 8 to 10 mph, with gusts as high as 21 mph.

    Low: 75 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 107. Southwest wind 9 to 14 mph, with gusts as high as 25 mph.

    High: 95 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 75. South wind 6 to 10 mph, with gusts as high as 22 mph.

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 95.

    High: 95 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 75.

    Low: 75 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 65. Light and variable wind.
Friday
Sunny, with a high near 92. Heat index values as high as 101. South wind 5 to 11 mph.
Friday Night
Clear, with a low around 75. South wind 8 to 10 mph, with gusts as high as 21 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 107. Southwest wind 9 to 14 mph, with gusts as high as 25 mph.
Saturday Night
Clear, with a low around 75. South wind 6 to 10 mph, with gusts as high as 22 mph.
Sunday
Sunny, with a high near 95.
Sunday Night
Mostly clear, with a low around 75.
Monday
Sunny, with a high near 96.
Monday Night
Mostly clear, with a low around 75.
Tuesday
A 20 percent chance of showers and thunderstorms before 1pm. Sunny, with a high near 95.
Tuesday Night
Partly cloudy, with a low around 74.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
A 30 percent chance of showers and thunderstorms. Sunny, with a high near 91.
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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:
5:52 pm CDT Jun 19, 2025
Forecast Valid:
7pm CDT Jun 19, 2025-6pm CDT Jun 26, 2025
 
Forecast Discussion
 
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Additional Resources

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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