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.

Light Rain Fog/Mist

71°F

22°C

Humidity 96%
Wind Speed S 3 mph
Barometer 29.98 in (1014.7 mb)
Dewpoint 70°F (21°C)
Visibility 4.00 mi
Last update 15 Oct 11:54 am CDT
Extended Forecast for

4 Miles W Winfield MO

  • This Afternoon

    This Afternoon: A 50 percent chance of showers and thunderstorms, mainly after 5pm. Cloudy, then gradually becoming mostly sunny, with a high near 79. Southwest wind 7 to 10 mph.

    High: 79 °F

    Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and midnight. Mostly cloudy, with a low around 45. Northwest wind 9 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.

    Low: 45 °F

    Showers
    Likely then
    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 55. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 31 mph.

    High: 55 °F

    Breezy.
    Becoming
    Cloudy then
    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 37. North wind 6 to 15 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Decreasing
    Clouds

  • Saturday

    Saturday: Sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 50 percent chance of showers and thunderstorms, mainly after 5pm. Cloudy, then gradually becoming mostly sunny, with a high near 79. Southwest wind 7 to 10 mph.
Tonight
Showers and thunderstorms likely before 10pm, then a chance of showers between 10pm and midnight. Mostly cloudy, with a low around 45. Northwest wind 9 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%.
Friday
A 20 percent chance of showers after 4pm. Increasing clouds, with a high near 55. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 37. North wind 6 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 59. Light and variable wind.
Saturday Night
Clear, with a low around 36.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 40.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 42.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 46.
Wednesday
Sunny, with a high near 77.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles W Winfield MO
 38.99°N 90.81°W (Elev. 591 ft)
Last Update:
11:21 am CDT Oct 15, 2026
Forecast Valid:
12pm CDT Oct 15, 2026-6pm CDT Oct 21, 2026
 
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