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.

Overcast

51°F

11°C

Humidity 77%
Wind Speed NW 13 G 21 mph
Barometer 30.43 in (1030.3 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 16 Oct 9:54 pm CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • Tonight

    Tonight: Patchy frost after 5am. Otherwise, partly cloudy, with a low around 36. North wind 9 to 13 mph, with gusts as high as 20 mph.

    Low: 36 °F

    Mostly Cloudy
    then Patchy
    Frost

  • Saturday

    Saturday: Patchy frost before 8am. Otherwise, sunny, with a high near 61. North wind 5 to 7 mph becoming calm in the afternoon.

    High: 61 °F

    Patchy Frost
    then Sunny

  • Saturday Night

    Saturday Night: Patchy frost after 5am. Otherwise, clear, with a low around 35. Light and variable wind.

    Low: 35 °F

    Clear then
    Patchy Frost

  • Sunday

    Sunday: Patchy frost before 8am. Otherwise, sunny, with a high near 66. South wind 5 to 8 mph.

    High: 66 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 37. Southeast wind around 6 mph becoming calm in the evening.

    Low: 37 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 40.

    Low: 40 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 75.

    High: 75 °F

    Sunny

  • Tuesday Night

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

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy frost after 5am. Otherwise, partly cloudy, with a low around 36. North wind 9 to 13 mph, with gusts as high as 20 mph.
Saturday
Patchy frost before 8am. Otherwise, sunny, with a high near 61. North wind 5 to 7 mph becoming calm in the afternoon.
Saturday Night
Patchy frost after 5am. Otherwise, clear, with a low around 35. Light and variable wind.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 66. South wind 5 to 8 mph.
Sunday Night
Clear, with a low around 37. Southeast wind around 6 mph becoming calm in the evening.
Monday
Sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 40.
Tuesday
Sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Clear, with a low around 45.
Thursday
Sunny, with a high near 81.
Thursday Night
Mostly clear, with a low around 48.
Friday
Mostly sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.94°N 90.45°W (Elev. 427 ft)
Last Update:
9:26 pm CDT Oct 16, 2026
Forecast Valid:
10pm CDT Oct 16, 2026-6pm CDT Oct 23, 2026
 
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