Current conditions at
St. Charles, St. Charles County Smartt Airport (KSET)
Lat: 38.93°NLon: 90.43°WElev: 436ft.
Light Rain
59°F
15°C
| Humidity | 38% |
| Wind Speed | NE 5 mph |
| Barometer | 29.99 in (1015.4 mb) |
| Dewpoint | 33°F (1°C) |
| Visibility | 10.00 mi |
| Last update | 28 Feb 5:54 pm CST |
Extended Forecast for
4 Miles E Portage Des Sioux MO
Tonight
Low: 31 °F
Slight Chance
T-storms then
Mostly ClearSunday

High: 46 °F
Partly Sunny
Sunday Night

Low: 33 °F
Rain/Snow
LikelyMonday
High: 44 °F
Chance Rain
then Slight
Chance RainMonday Night

Low: 40 °F
Rain
Tuesday

High: 63 °F
Rain
Tuesday Night

Low: 52 °F
Rain
Wednesday

High: 67 °F
Rain
Wednesday Night

Low: 52 °F
Rain Likely
Detailed Forecast
Tonight
A 20 percent chance of rain and thunderstorms before 7pm. Mostly cloudy, then gradually becoming clear, with a low around 31. North wind 6 to 13 mph, with gusts as high as 22 mph.
Sunday
Partly sunny, with a high near 46. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.
Sunday Night
Snow likely, possibly mixed with rain, becoming all snow after 3am. Cloudy, with a low around 33. East wind 7 to 9 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday
A 50 percent chance of rain, mainly before noon. Cloudy, with a high near 44. Southeast wind around 10 mph.
Monday Night
Rain. Low around 40. Southeast wind 6 to 8 mph. Chance of precipitation is 90%.
Tuesday
Rain and possibly a thunderstorm. High near 63. Chance of precipitation is 90%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm. High near 67. Chance of precipitation is 80%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Thursday
Rain likely. Partly sunny, with a high near 70. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Partly cloudy, with a low around 55.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 72. Chance of precipitation is 70%.
Friday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Saturday
Rain likely. Mostly cloudy, with a high near 66. Chance of precipitation is 70%.
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)
4:36 pm CST Feb 28, 2026
6pm CST Feb 28, 2026-6pm CST Mar 7, 2026


