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Hazardous Weather Conditions
Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fog/Mist
76°F
24°C
| Humidity | 97% |
| Wind Speed | E 3 mph |
| Barometer | 29.91 in (1012.1 mb) |
| Dewpoint | 75°F (24°C) |
| Visibility | 3.00 mi |
| Heat Index | 75°F (24°C) |
| Last update | 26 Jul 3:54 am CDT |
Extended Forecast for
4 Miles SSW Portage Des Sioux MO
Extreme Heat Warning July 26, 11:00am until July 27, 09:00pm
Today
High: 97 °F
Chance
T-storms and
Patchy FogTonight
Low: 79 °F
Partly Cloudy
Monday
High: 97 °F
Hot
Monday Night
Low: 80 °F
Mostly Clear
Tuesday
High: 92 °F
Mostly Sunny
Tuesday Night
Low: 72 °F
Partly Cloudy
Wednesday
High: 89 °F
Sunny
Wednesday Night
Low: 68 °F
Mostly Clear
Thursday
High: 89 °F
Sunny
Detailed Forecast
Today
A chance of showers and thunderstorms before 1pm, then a slight chance of showers and thunderstorms after 3pm. Patchy fog before 8am. Otherwise, partly sunny and hot, with a high near 97. Heat index values as high as 113. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 30%.
Tonight
Partly cloudy, with a low around 79. Southwest wind around 5 mph becoming light and variable.
Monday
Sunny and hot, with a high near 97. Heat index values as high as 110. Southwest wind 5 to 11 mph.
Monday Night
Mostly clear, with a low around 80. Southwest wind 7 to 9 mph.
Tuesday
Mostly sunny, with a high near 92. Northwest wind 7 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 72.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 89.
Thursday Night
A 20 percent chance of showers after 1am. Mostly cloudy, with a low around 70.
Friday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 86.
Friday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 69.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 86.
Additional Forecasts and Information
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Point Forecast:
4 Miles SSW Portage Des Sioux MO
38.87°N 90.36°W (Elev. 430 ft)
38.87°N 90.36°W (Elev. 430 ft)
4:01 am CDT Jul 26, 2026
4am CDT Jul 26, 2026-6pm CDT Aug 1, 2026
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