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

60°F

16°C

Humidity 90%
Wind Speed SW 3 mph
Barometer 29.88 in (1011.3 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 7 Mar 1:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Overnight

    Overnight: Rain and possibly a thunderstorm. Low around 59. South wind 8 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.

    Low: 59 °F

    Rain

  • Saturday

    Saturday: Showers, mainly before 8am. Temperature rising to near 63 by 9am, then falling to around 55 during the remainder of the day. Southwest wind 8 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.

    High: 63 °F⇓

    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 34. Northwest wind 5 to 10 mph becoming light west after midnight.

    Low: 34 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Sunny, with a high near 67. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43. South wind around 8 mph.

    Low: 43 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Monday Night

    Monday Night: A 30 percent chance of rain after midnight. Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear
    then Chance
    Rain

  • Tuesday

    Tuesday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after noon. High near 80. Chance of precipitation is 80%.

    High: 80 °F

    Chance Rain
    then Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 49. Chance of precipitation is 90%.

    Low: 49 °F

    Rain

Detailed Forecast

Overnight
Rain and possibly a thunderstorm. Low around 59. South wind 8 to 13 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
Saturday
Showers, mainly before 8am. Temperature rising to near 63 by 9am, then falling to around 55 during the remainder of the day. Southwest wind 8 to 17 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Saturday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 34. Northwest wind 5 to 10 mph becoming light west after midnight.
Sunday
Sunny, with a high near 67. Light southwest wind increasing to 5 to 10 mph in the morning.
Sunday Night
Clear, with a low around 43. South wind around 8 mph.
Monday
Sunny, with a high near 78.
Monday Night
A 30 percent chance of rain after midnight. Mostly clear, with a low around 56.
Tuesday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after noon. High near 80. Chance of precipitation is 80%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 49. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm before noon, then a chance of rain. High near 61. Breezy. Chance of precipitation is 80%.
Wednesday Night
Partly cloudy, with a low around 31.
Thursday
Mostly sunny, with a high near 55.
Thursday Night
Mostly cloudy, with a low around 38.
Friday
Mostly cloudy, with a high near 65.
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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:
2:21 am CST Mar 7, 2026
Forecast Valid:
2am CST Mar 7, 2026-6pm CDT Mar 13, 2026
 
Forecast Discussion
 
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Additional Resources

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