Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
42°F
6°C
| Humidity | 92% |
| Wind Speed | E 6 mph |
| Barometer | 30.36 in (1028.1 mb) |
| Dewpoint | 40°F (4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 19 Oct 12:54 am CDT |
Extended Forecast for
3 Miles ENE Portage Des Sioux MO
Overnight
Low: 41 °F
Patchy Fog
Monday
High: 74 °F
Patchy Fog
then SunnyMonday Night
Low: 45 °F
Partly Cloudy
Tuesday
High: 76 °F
Sunny
Tuesday Night
Low: 46 °F
Mostly Clear
Wednesday
High: 78 °F
Sunny
Wednesday Night
Low: 48 °F
Clear
Thursday
High: 78 °F
Sunny
Thursday Night
Low: 50 °F
Clear
Detailed Forecast
Overnight
Patchy fog after 5am. Otherwise, clear, with a low around 41. Calm wind.
Monday
Patchy fog before 8am. Otherwise, sunny, with a high near 74. Calm wind becoming south around 5 mph.
Monday Night
Partly cloudy, with a low around 45. Calm wind.
Tuesday
Sunny, with a high near 76. Light and variable wind.
Tuesday Night
Mostly clear, with a low around 46. Calm wind.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Clear, with a low around 48.
Thursday
Sunny, with a high near 78.
Thursday Night
Clear, with a low around 50.
Friday
Sunny, with a high near 77.
Friday Night
Mostly clear, with a low around 49.
Saturday
Mostly sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
Mostly sunny, with a high near 80.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
3 Miles ENE Portage Des Sioux MO
38.93°N 90.27°W (Elev. 407 ft)
38.93°N 90.27°W (Elev. 407 ft)
12:25 am CDT Oct 19, 2026
1am CDT Oct 19, 2026-6pm CDT Oct 25, 2026
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