Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Fair
19°F
-7°C
| Humidity | 57% |
| Wind Speed | NW 16 mph |
| Barometer | 30.18 in (1022.5 mb) |
| Dewpoint | 6°F (-14°C) |
| Visibility | 10.00 mi |
| Wind Chill | 4°F (-16°C) |
| Last update | 17 Mar 3:54 am CDT |
Extended Forecast for
Portage Des Sioux MO
Today

High: 34 °F
Increasing
CloudsTonight
Low: 29 °F
Chance Snow
then Chance
Rain/SnowWednesday

High: 64 °F
Becoming
SunnyWednesday Night

Low: 41 °F
Mostly Cloudy
Thursday

High: 74 °F
Mostly Sunny
Thursday Night

Low: 45 °F
Mostly Clear
Friday

High: 76 °F
Mostly Sunny
Friday Night

Low: 49 °F
Mostly Clear
Saturday

High: 78 °F
Sunny
Detailed Forecast
Today
Increasing clouds, with a high near 34. Northwest wind 6 to 10 mph becoming south in the afternoon.
Tonight
A chance of snow before 3am, then a chance of rain. Cloudy, with a low around 29. Southeast wind 6 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 64. South wind 8 to 10 mph becoming west in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 41. Light and variable wind.
Thursday
Mostly sunny, with a high near 74. Light and variable wind becoming southwest 5 to 7 mph in the morning.
Thursday Night
Mostly clear, with a low around 45.
Friday
Mostly sunny, with a high near 76.
Friday Night
Mostly clear, with a low around 49.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 52.
Sunday
Sunny, with a high near 75.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 56.
Additional Forecasts and Information
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ABOUT THIS FORECAST
Point Forecast:
Portage Des Sioux MO
38.93°N 90.33°W (Elev. 407 ft)
38.93°N 90.33°W (Elev. 407 ft)
3:31 am CDT Mar 17, 2026
4am CDT Mar 17, 2026-6pm CDT Mar 23, 2026


