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

71°F

22°C

Humidity 94%
Wind Speed E 5 mph
Barometer 29.88 in (1011.1 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 17 Jun 12:54 am CDT
Extended Forecast for

Winfield MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 89 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly before 10pm. Increasing clouds, with a low around 71. South wind 3 to 6 mph.

    Low: 71 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 83. Southwest wind 7 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    High: 83 °F

    T-storms
    Likely

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 7pm. Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.

    Low: 66 °F

    T-storms
    Likely then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 69. Calm wind.
Tuesday
Mostly sunny, with a high near 89. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
A 40 percent chance of showers and thunderstorms, mainly before 10pm. Increasing clouds, with a low around 71. South wind 3 to 6 mph.
Wednesday
A chance of showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 4pm, then showers and thunderstorms likely after 4pm. Mostly cloudy, with a high near 83. Southwest wind 7 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Wednesday Night
Showers and thunderstorms likely, mainly before 7pm. Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%.
Juneteenth
Sunny, with a high near 84.
Thursday Night
Mostly clear, with a low around 66.
Friday
Sunny, with a high near 90.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 94.
Saturday Night
Mostly clear, with a low around 75.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 74.
Monday
A 20 percent chance of showers. Sunny, with a high near 93.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Winfield MO
 38.99°N 90.76°W (Elev. 502 ft)
Last Update:
10:21 pm CDT Jun 16, 2025
Forecast Valid:
1am CDT Jun 17, 2025-6pm CDT Jun 23, 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