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.

A Few Clouds

50°F

10°C

Humidity 57%
Wind Speed SW 16 mph
Barometer 29.57 in (1001.3 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 10 Dec 1:54 am CST
Extended Forecast for

2 Miles ENE Portage Des Sioux MO

Wind Advisory December 10, 03:00am until December 10, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Overnight

    Overnight: A 20 percent chance of sprinkles with a slight chance of rain between 4am and 5am. Cloudy, with a low around 37. West wind 15 to 18 mph, with gusts as high as 29 mph.

    Low: 37 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Mostly cloudy, with a temperature falling to around 33 by 5pm. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 46 mph.

    High: 40 °F⇓

    Mostly Cloudy
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 23. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 23 °F

    Mostly Cloudy

  • Thursday

    Thursday: Increasing clouds, with a high near 38. Light and variable wind becoming southeast 5 to 8 mph in the morning.

    High: 38 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 30. Southeast wind 6 to 8 mph becoming northwest after midnight.

    Low: 30 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 19.

    Low: 19 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31.

    High: 31 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 6.

    Low: 6 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 20 percent chance of sprinkles with a slight chance of rain between 4am and 5am. Cloudy, with a low around 37. West wind 15 to 18 mph, with gusts as high as 29 mph.
Wednesday
Mostly cloudy, with a temperature falling to around 33 by 5pm. Breezy, with a northwest wind 14 to 23 mph, with gusts as high as 46 mph.
Wednesday Night
Mostly cloudy, with a low around 23. Northwest wind 5 to 10 mph becoming light after midnight.
Thursday
Increasing clouds, with a high near 38. Light and variable wind becoming southeast 5 to 8 mph in the morning.
Thursday Night
A 20 percent chance of snow before midnight. Mostly cloudy, with a low around 30. Southeast wind 6 to 8 mph becoming northwest after midnight.
Friday
Partly sunny, with a high near 39.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
A 20 percent chance of snow after noon. Mostly cloudy, with a high near 31.
Saturday Night
Mostly cloudy, with a low around 6.
Sunday
Sunny, with a high near 22.
Sunday Night
Mostly clear, with a low around 11.
Monday
Mostly sunny, with a high near 36.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Portage Des Sioux MO
 38.93°N 90.3°W (Elev. 407 ft)
Last Update:
1:21 am CST Dec 10, 2025
Forecast Valid:
2am CST Dec 10, 2025-6pm CST Dec 16, 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