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.

Fog/Mist

59°F

15°C

Humidity 87%
Wind Speed S 20 G 26 mph
Barometer 29.62 in (1003.1 mb)
Dewpoint 55°F (13°C)
Visibility 6.00 mi
Last update 8 Jan 12:54 pm CST
Extended Forecast for

3 Miles ENE Portage Des Sioux MO

  • This Afternoon

    This Afternoon: Showers likely, then showers and possibly a thunderstorm after 3pm. High near 64. Breezy, with a south wind 20 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 90%.

    High: 64 °F

    Showers and
    Breezy

  • Tonight

    Tonight: Showers and possibly a thunderstorm before 10pm, then a slight chance of showers between 10pm and midnight. Low around 45. Breezy, with a south wind 16 to 21 mph becoming west after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 80%.

    Low: 45 °F

    Showers and
    Breezy then
    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a steady temperature around 48. West wind 6 to 16 mph becoming north in the afternoon. Winds could gust as high as 25 mph.

    High: 48 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 38. North wind around 5 mph becoming calm.

    Low: 38 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 45. Northwest wind 6 to 14 mph, with gusts as high as 22 mph.

    High: 45 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 23.

    Low: 23 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 35.

    High: 35 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 24.

    Low: 24 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely, then showers and possibly a thunderstorm after 3pm. High near 64. Breezy, with a south wind 20 to 22 mph, with gusts as high as 37 mph. Chance of precipitation is 90%.
Tonight
Showers and possibly a thunderstorm before 10pm, then a slight chance of showers between 10pm and midnight. Low around 45. Breezy, with a south wind 16 to 21 mph becoming west after midnight. Winds could gust as high as 32 mph. Chance of precipitation is 80%.
Friday
Mostly cloudy, with a steady temperature around 48. West wind 6 to 16 mph becoming north in the afternoon. Winds could gust as high as 25 mph.
Friday Night
A 20 percent chance of rain after midnight. Mostly cloudy, with a low around 38. North wind around 5 mph becoming calm.
Saturday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 45. Northwest wind 6 to 14 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 23.
Sunday
Sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Partly sunny, with a high near 55.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 36.
Wednesday
Mostly cloudy, with a high near 42.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles ENE Portage Des Sioux MO
 38.93°N 90.27°W (Elev. 407 ft)
Last Update:
12:31 pm CST Jan 8, 2026
Forecast Valid:
1pm CST Jan 8, 2026-6pm CST Jan 14, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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