Hazardous Weather Conditions
Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
41°F
5°C
| Humidity | 96% |
| Wind Speed | E 5 mph |
| Barometer | 30.45 in (1031.2 mb) |
| Dewpoint | 40°F (4°C) |
| Visibility | 10.00 mi |
| Wind Chill | 38°F (3°C) |
| Last update | 18 Oct 1:54 am CDT |
Extended Forecast for
3 Miles ENE Portage Des Sioux MO
Frost Advisory until October 18, 09:00am
NOW until 9:00am Sun
Frost Advisory
Overnight
Low: 37 °F
Clear
Sunday
High: 69 °F
Patchy Frost
and Patchy
Fog then
SunnySunday Night
Low: 41 °F
Clear
Monday
High: 71 °F
Sunny
Monday Night
Low: 42 °F
Mostly Clear
Tuesday
High: 75 °F
Sunny
Tuesday Night
Low: 44 °F
Mostly Clear
Wednesday
High: 77 °F
Sunny
Detailed Forecast
Overnight
Clear, with a low around 37. Light southeast wind.
Sunday
Patchy fog before 7am. Patchy frost before 8am. Otherwise, sunny, with a high near 69. South wind 3 to 8 mph.
Sunday Night
Clear, with a low around 41. Southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 71. Light and variable wind.
Monday Night
Mostly clear, with a low around 42. Calm wind.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 82.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 49.
Saturday
Mostly sunny, with a high near 81.
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)
2:21 am CDT Oct 18, 2026
2am CDT Oct 18, 2026-6pm CDT Oct 24, 2026
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