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

42°F

6°C

Humidity 65%
Wind Speed NW 14 G 23 mph
Barometer 30.14 in (1020.8 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 10 Jan 11:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 47. Northwest wind 7 to 16 mph, with gusts as high as 26 mph.

    High: 47 °F

    Sunny

  • Tonight

    Tonight: A chance of rain and snow showers before midnight, then a chance of flurries between midnight and 4am. Mostly cloudy, then gradually becoming clear, with a low around 26. Northwest wind 7 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 50%.

    Low: 26 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 39. Northwest wind 8 to 14 mph, with gusts as high as 29 mph.

    High: 39 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 26. Southwest wind 3 to 7 mph.

    Low: 26 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 51. West wind 7 to 10 mph.

    High: 51 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 58.

    High: 58 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain after noon. Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy
    then Slight
    Chance Rain

Detailed Forecast

This Afternoon
Sunny, with a high near 47. Northwest wind 7 to 16 mph, with gusts as high as 26 mph.
Tonight
A chance of rain and snow showers before midnight, then a chance of flurries between midnight and 4am. Mostly cloudy, then gradually becoming clear, with a low around 26. Northwest wind 7 to 17 mph, with gusts as high as 36 mph. Chance of precipitation is 50%.
Sunday
Sunny, with a high near 39. Northwest wind 8 to 14 mph, with gusts as high as 29 mph.
Sunday Night
Mostly clear, with a low around 26. Southwest wind 3 to 7 mph.
Monday
Mostly sunny, with a high near 51. West wind 7 to 10 mph.
Monday Night
Mostly clear, with a low around 36.
Tuesday
Partly sunny, with a high near 58.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain after noon. Mostly cloudy, with a high near 43.
Wednesday Night
Partly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 27.
Friday
Mostly cloudy, with a high near 44.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.93°N 90.42°W (Elev. 427 ft)
Last Update:
11:57 am CST Jan 10, 2026
Forecast Valid:
12pm CST Jan 10, 2026-6pm CST Jan 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation