Hazardous Weather Conditions
Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Partly Cloudy
90°F
32°C
| Humidity | 63% |
| Wind Speed | N 5 mph |
| Barometer | 30.01 in (1015.7 mb) |
| Dewpoint | 76°F (24°C) |
| Visibility | 10.00 mi |
| Heat Index | 101°F (38°C) |
| Last update | 19 Aug 11:54 am CDT |
Extended Forecast for
Portage Des Sioux MO
Heat Advisory August 19, 12:12pm until August 19, 08:00pm
NOW until 8:00pm Tue
Heat Advisory
This Afternoon
High: 93 °F
Slight Chance
T-stormsTonight
Low: 72 °F
Partly Cloudy
Wednesday
High: 87 °F
Mostly Sunny
Wednesday Night
Low: 65 °F
Mostly Clear
Thursday
High: 85 °F
Sunny
Thursday Night
Low: 65 °F
Mostly Clear
Friday
High: 87 °F
Sunny
Friday Night
Low: 66 °F
Mostly Clear
Detailed Forecast
This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. Heat index values as high as 105. Northwest wind around 8 mph.
Tonight
Partly cloudy, with a low around 72. North wind 6 to 8 mph.
Wednesday
Mostly sunny, with a high near 87. North wind 6 to 10 mph.
Wednesday Night
Mostly clear, with a low around 65. Northeast wind 5 to 8 mph.
Thursday
Sunny, with a high near 85. Northeast wind 6 to 9 mph.
Thursday Night
Mostly clear, with a low around 65.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 66.
Saturday
Mostly sunny, with a high near 87.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 58.
Monday
Mostly sunny, with a high near 77.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Portage Des Sioux MO
38.93°N 90.36°W (Elev. 407 ft)
38.93°N 90.36°W (Elev. 407 ft)
12:01 pm CDT Aug 19, 2025
12pm CDT Aug 19, 2025-6pm CDT Aug 25, 2025
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