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.

Overcast

36°F

2°C

Humidity 97%
Wind Speed Calm
Barometer 30.05 in (1017.6 mb)
Dewpoint 35°F (2°C)
Visibility 8.00 mi
Last update 10 Jan 3:54 am CST
Extended Forecast for

3 Miles WNW Winfield MO

  • Overnight

    Overnight: Rain likely, mainly after 4am. Mostly cloudy, with a steady temperature around 41. Calm wind becoming northwest around 6 mph. Chance of precipitation is 60%.

    Low: 41 °F

    Rain Likely

  • Saturday

    Saturday: A chance of rain, possibly mixing with snow after 8am, then gradually ending. Cloudy through mid morning, then gradual clearing, with a high near 45. Northwest wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.

    High: 45 °F

    Chance
    Rain/Snow
    then Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 25. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 25 °F

    Gradual
    Clearing

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 5 to 13 mph, with gusts as high as 24 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. Southwest wind 3 to 7 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 51.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Rain likely, mainly after 4am. Mostly cloudy, with a steady temperature around 41. Calm wind becoming northwest around 6 mph. Chance of precipitation is 60%.
Saturday
A chance of rain, possibly mixing with snow after 8am, then gradually ending. Cloudy through mid morning, then gradual clearing, with a high near 45. Northwest wind 9 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 50%.
Saturday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 25. Northwest wind 10 to 15 mph, with gusts as high as 30 mph.
Sunday
Sunny, with a high near 38. Northwest wind 5 to 13 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 26. Southwest wind 3 to 7 mph.
Monday
Mostly sunny, with a high near 51.
Monday Night
Mostly clear, with a low around 37.
Tuesday
Partly sunny, with a high near 57.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 42.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 37.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Partly sunny, with a high near 43.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Winfield MO
 39.01°N 90.78°W (Elev. 551 ft)
Last Update:
3:16 am CST Jan 10, 2026
Forecast Valid:
3am CST Jan 10, 2026-6pm CST Jan 16, 2026
 
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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