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

74°F

23°C

Humidity 91%
Wind Speed NW 5 mph
Barometer 29.96 in (1014.1 mb)
Dewpoint 71°F (22°C)
Visibility 9.00 mi
Last update 5 Jul 7:54 am CDT
Extended Forecast for

3 Miles WNW Winfield MO

  • Today

    Today: A slight chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. North wind 3 to 7 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 68. North wind 3 to 6 mph.

    Low: 68 °F

    Slight Chance
    T-storms then
    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 85. North wind 6 to 8 mph.

    High: 85 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 66. Northeast wind 5 to 7 mph becoming calm in the evening.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 86. Light north wind.

    High: 86 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 9am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. North wind 3 to 7 mph. Chance of precipitation is 20%.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 68. North wind 3 to 6 mph.
Monday
Mostly sunny, with a high near 85. North wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 66. Northeast wind 5 to 7 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 86. Light north wind.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 90.
Wednesday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 72.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Thursday Night
Showers and thunderstorms likely, mainly after 1am. Mostly cloudy, with a low around 71. Chance of precipitation is 60%.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Friday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68.
Saturday
Mostly sunny, with a high near 88.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Winfield MO
 39.01°N 90.81°W (Elev. 600 ft)
Last Update:
6:06 am CDT Jul 5, 2026
Forecast Valid:
8am CDT Jul 5, 2026-6pm CDT Jul 11, 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