Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
44°F
7°C
| Humidity | 85% |
| Wind Speed | NE 5 mph |
| Barometer | 30.04 in (1017.4 mb) |
| Dewpoint | 40°F (4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 41°F (5°C) |
| Last update | 18 Mar 11:54 pm CDT |
Extended Forecast for
4 Miles E Portage Des Sioux MO
Overnight
Low: 43 °F
Partly Cloudy
Thursday
High: 75 °F
Becoming
SunnyThursday Night
Low: 49 °F
Mostly Clear
Friday
High: 82 °F
Sunny
Friday Night
Low: 51 °F
Partly Cloudy
Saturday
High: 80 °F
Sunny
Saturday Night
Low: 57 °F
Mostly Clear
Sunday
High: 80 °F
Mostly Sunny
Sunday Night
Low: 37 °F
Mostly Cloudy
Detailed Forecast
Overnight
Partly cloudy, with a low around 43. Calm wind.
Thursday
Partly sunny, then gradually becoming sunny, with a high near 75. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 49. Light southeast wind.
Friday
Sunny, with a high near 82. Calm wind becoming southwest 5 to 9 mph in the morning.
Friday Night
Partly cloudy, with a low around 51. West wind around 6 mph becoming calm after midnight.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Mostly cloudy, with a low around 37.
Monday
Partly sunny, with a high near 54.
Monday Night
Partly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 42.
Wednesday
Partly sunny, with a high near 69.
Additional Forecasts and Information
Basemap Options
Click map to change the forecast location
Loading map...
Forecast AreaABOUT THIS FORECAST
Point Forecast:
4 Miles E Portage Des Sioux MO
38.93°N 90.27°W (Elev. 407 ft)
38.93°N 90.27°W (Elev. 407 ft)
10:21 pm CDT Mar 18, 2026
12am CDT Mar 19, 2026-6pm CDT Mar 25, 2026
Additional Resources
Radar & Satellite Image
Hourly Weather Forecast
