National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

St. Charles, St. Charles County Smartt Airport (KSET)

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

64°F

18°C

Humidity 56%
Wind Speed W 14 mph
Barometer 30.05 in (1017.4 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 5 Nov 9:54 am CST
Extended Forecast for

2 Miles ENE Portage Des Sioux MO

  • Today

    Today: Sunny, with a high near 68. Northwest wind 8 to 16 mph, with gusts as high as 23 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 37. North wind around 6 mph becoming light and variable.

    Low: 37 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 65. Southeast wind 5 to 14 mph, with gusts as high as 24 mph.

    High: 65 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Southeast wind 9 to 11 mph becoming southwest after midnight.

    Low: 54 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: A 20 percent chance of rain before noon. Mostly sunny, with a high near 73. West wind 9 to 13 mph, with gusts as high as 21 mph.

    High: 73 °F

    Slight Chance
    Rain then
    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of rain after noon. Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 68. Northwest wind 8 to 16 mph, with gusts as high as 23 mph.
Tonight
Clear, with a low around 37. North wind around 6 mph becoming light and variable.
Thursday
Sunny, with a high near 65. Southeast wind 5 to 14 mph, with gusts as high as 24 mph.
Thursday Night
A 30 percent chance of rain after midnight. Mostly cloudy, with a low around 54. Southeast wind 9 to 11 mph becoming southwest after midnight.
Friday
A 20 percent chance of rain before noon. Mostly sunny, with a high near 73. West wind 9 to 13 mph, with gusts as high as 21 mph.
Friday Night
Mostly clear, with a low around 42.
Saturday
A 20 percent chance of rain after noon. Mostly sunny, with a high near 67.
Saturday Night
A 20 percent chance of rain before midnight. Mostly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 45.
Sunday Night
Mostly clear, with a low around 24.
Monday
Sunny, with a high near 44.
Monday Night
Mostly clear, with a low around 27.
Veterans Day
Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Portage Des Sioux MO
 38.93°N 90.3°W (Elev. 407 ft)
Last Update:
9:51 am CST Nov 5, 2025
Forecast Valid:
10am CST Nov 5, 2025-6pm CST Nov 11, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation