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

    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.

    Low: 31 °F

    Slight Chance
    T-storms then
    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 46. Northeast wind 9 to 11 mph, with gusts as high as 20 mph.

    High: 46 °F

    Partly Sunny

  • Sunday Night

    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.

    Low: 33 °F

    Rain/Snow
    Likely

  • Monday

    Monday: A 50 percent chance of rain, mainly before noon.  Cloudy, with a high near 44. Southeast wind around 10 mph.

    High: 44 °F

    Chance Rain
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain.  Low around 40. Southeast wind 6 to 8 mph.  Chance of precipitation is 90%.

    Low: 40 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm.  High near 63. Chance of precipitation is 90%.

    High: 63 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm.  Low around 52. Chance of precipitation is 90%.

    Low: 52 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm.  High near 67. Chance of precipitation is 80%.

    High: 67 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely and possibly a thunderstorm.  Mostly cloudy, with a low around 52. Chance of precipitation is 70%.

    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%.
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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)
4:36 pm CST Feb 28, 2026
6pm CST Feb 28, 2026-6pm CST Mar 7, 2026
 
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Additional Resources

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