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

35°F

2°C

Humidity 76%
Wind Speed Calm
Barometer 30.05 in (1017.5 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 17 Nov 1:54 am CST
Extended Forecast for

3 Miles E Winfield MO

  • Overnight

    Overnight: Mostly clear, with a low around 36. Light and variable wind.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Scattered showers, mainly after 5pm. Increasing clouds, with a high near 59. Light east wind becoming southeast 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 30%.

    High: 59 °F

    Sunny then
    Scattered
    Showers

  • Monday Night

    Monday Night: Scattered showers and thunderstorms before 1am, then isolated showers between 1am and 5am. Mostly cloudy, with a low around 47. Southeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    Low: 47 °F

    Scattered
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 71. Southeast wind 6 to 8 mph becoming northwest in the afternoon.

    High: 71 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 45. North wind around 6 mph becoming calm in the evening.

    Low: 45 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 63.

    High: 63 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Slight Chance
    Rain then
    Chance Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 90%.

    High: 66 °F

    Rain

  • Thursday Night

    Thursday Night: Rain likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.

    Low: 54 °F

    Rain Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 36. Light and variable wind.
Monday
Scattered showers, mainly after 5pm. Increasing clouds, with a high near 59. Light east wind becoming southeast 8 to 13 mph in the morning. Winds could gust as high as 22 mph. Chance of precipitation is 30%.
Monday Night
Scattered showers and thunderstorms before 1am, then isolated showers between 1am and 5am. Mostly cloudy, with a low around 47. Southeast wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Tuesday
Partly sunny, with a high near 71. Southeast wind 6 to 8 mph becoming northwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 45. North wind around 6 mph becoming calm in the evening.
Wednesday
Mostly cloudy, with a high near 63.
Wednesday Night
A 50 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 49.
Thursday
Rain and possibly a thunderstorm. High near 66. Chance of precipitation is 90%.
Thursday Night
Rain likely. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Friday
A 50 percent chance of rain. Partly sunny, with a high near 65.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 43.
Saturday
Partly sunny, with a high near 56.
Saturday Night
Partly cloudy, with a low around 38.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles E Winfield MO
 39.01°N 90.7°W (Elev. 430 ft)
Last Update:
1:41 am CST Nov 17, 2025
Forecast Valid:
2am CST Nov 17, 2025-6pm CST Nov 23, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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