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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Overcast

43°F

6°C

Humidity 68%
Wind Speed E 8 mph
Barometer 30.08 in (1018.6 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 25 Mar 5:54 am CDT
Extended Forecast for

St. Charles County Smartt Airport MO

  • Today

    Today: Mostly sunny, with a high near 79. East wind 5 to 11 mph becoming south in the afternoon.

    High: 79 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 59. South wind around 10 mph.

    Low: 59 °F

    Partly Cloudy

  • Thursday

    Thursday: A 20 percent chance of rain after 1pm. Increasing clouds, with a high near 95. Southwest wind 10 to 16 mph, with gusts as high as 28 mph.

    High: 95 °F

    Sunny then
    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 4am, then rain after 4am. Low around 42. West wind 10 to 18 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.

    Low: 42 °F

    Showers

  • Friday

    Friday: Rain, mainly before 7am. High near 53. North wind 15 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    High: 53 °F

    Rain then
    Slight Chance
    Rain

  • Friday Night

    Friday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 79. East wind 5 to 11 mph becoming south in the afternoon.
Tonight
Partly cloudy, with a low around 59. South wind around 10 mph.
Thursday
A 20 percent chance of rain after 1pm. Increasing clouds, with a high near 95. Southwest wind 10 to 16 mph, with gusts as high as 28 mph.
Thursday Night
Showers and possibly a thunderstorm before 4am, then rain after 4am. Low around 42. West wind 10 to 18 mph becoming north after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 90%.
Friday
Rain, mainly before 7am. High near 53. North wind 15 to 17 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Friday Night
Mostly clear, with a low around 30.
Saturday
Sunny, with a high near 59.
Saturday Night
Partly cloudy, with a low around 39.
Sunday
Partly sunny, with a high near 66.
Sunday Night
A 20 percent chance of rain and thunderstorms after 1am. Mostly cloudy, with a low around 50.
Monday
A 20 percent chance of rain and thunderstorms. Mostly sunny, with a high near 82.
Monday Night
A 30 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 57.
Tuesday
A 40 percent chance of rain and thunderstorms. Partly sunny, with a high near 81.
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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:
3:51 am CDT Mar 25, 2026
Forecast Valid:
6am CDT Mar 25, 2026-6pm CDT Mar 31, 2026
 
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Additional Resources

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Chance of Precipitation