Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
65°F
18°C
| Humidity | 70% |
| Wind Speed | S 16 mph |
| Barometer | 29.84 in (1010.2 mb) |
| Dewpoint | 55°F (13°C) |
| Visibility | 10.00 mi |
| Last update | 9 Mar 10:54 am CDT |
Extended Forecast for
4 Miles E Portage Des Sioux MO
Today

High: 80 °F
Mostly Sunny
Tonight

Low: 60 °F
Mostly Clear
Tuesday
High: 83 °F
Mostly Sunny
then Chance
ShowersTuesday Night
Low: 54 °F
Showers
Likely then
T-stormsWednesday

High: 62 °F⇓
Showers and
BreezyWednesday Night

Low: 33 °F
Mostly Cloudy
Thursday

High: 54 °F
Sunny
Thursday Night

Low: 44 °F
Mostly Cloudy
Friday

High: 63 °F
Partly Sunny
Detailed Forecast
Today
Mostly sunny, with a high near 80. South wind 13 to 15 mph, with gusts as high as 25 mph.
Tonight
Mostly clear, with a low around 60. South wind 6 to 10 mph.
Tuesday
A slight chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 83. South wind 6 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Tuesday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 7pm. Low around 54. South wind 11 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Wednesday
Showers and possibly a thunderstorm. Temperature rising to near 62 by 10am, then falling to around 49 during the remainder of the day. Breezy, with a southwest wind 13 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 33.
Thursday
Sunny, with a high near 54.
Thursday Night
Mostly cloudy, with a low around 44.
Friday
Partly sunny, with a high near 63.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 66.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 48.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 69. Breezy.
Additional Forecasts and Information
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ABOUT 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)
9:51 am CDT Mar 9, 2026
11am CDT Mar 9, 2026-6pm CDT Mar 15, 2026


