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.

Overcast

74°F

23°C

Humidity 69%
Wind Speed SW 17 G 25 mph
Barometer 29.88 in (1011.1 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 4 Apr 2:54 am CDT
Extended Forecast for

4 Miles S Portage Des Sioux MO

  • Overnight

    Overnight: Showers and possibly a thunderstorm. Low around 59. Southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.

    Low: 59 °F

    Showers

  • Saturday

    Saturday: Showers and possibly a thunderstorm before 9am, then a chance of showers between 9am and 11am. Temperature falling to around 54 by 1pm. West wind 11 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.

    High: 63 °F⇓

    Showers then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming clear, with a low around 40. West wind 9 to 16 mph, with gusts as high as 23 mph.

    Low: 40 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 59. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 40. West wind 5 to 7 mph.

    Low: 40 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Monday Night

    Monday Night: A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Tuesday

    Tuesday: Partly sunny, with a high near 54.

    High: 54 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers and possibly a thunderstorm. Low around 59. Southwest wind around 14 mph, with gusts as high as 23 mph. Chance of precipitation is 90%.
Saturday
Showers and possibly a thunderstorm before 9am, then a chance of showers between 9am and 11am. Temperature falling to around 54 by 1pm. West wind 11 to 18 mph, with gusts as high as 26 mph. Chance of precipitation is 90%.
Saturday Night
Mostly cloudy, then gradually becoming clear, with a low around 40. West wind 9 to 16 mph, with gusts as high as 23 mph.
Sunday
Sunny, with a high near 59. Northwest wind 9 to 13 mph, with gusts as high as 20 mph.
Sunday Night
Clear, with a low around 40. West wind 5 to 7 mph.
Monday
Sunny, with a high near 61.
Monday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 37.
Tuesday
Partly sunny, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 42.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
A 20 percent chance of showers. Mostly sunny, with a high near 77.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 56.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Portage Des Sioux MO
 38.87°N 90.33°W (Elev. 456 ft)
Last Update:
1:25 am CDT Apr 4, 2026
Forecast Valid:
3am CDT Apr 4, 2026-6pm CDT Apr 10, 2026
 
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