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.

Fair

41°F

5°C

Humidity 86%
Wind Speed NE 7 mph
Barometer 30.13 in (1020.4 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 9 Jan 7:54 pm CST
Extended Forecast for

St. Charles County Smartt Airport MO

  • Tonight

    Tonight: A 40 percent chance of rain, mainly after 4am. Mostly cloudy, with a low around 36. Light and variable wind becoming northwest 5 to 7 mph after midnight.

    Low: 36 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: A chance of rain before 9am, then a chance of sprinkles after 4pm. Cloudy through mid morning, then gradual clearing, with a high near 46. Northwest wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.

    High: 46 °F

    Chance Rain
    then Sunny

  • Saturday Night

    Saturday Night: A chance of sprinkles and flurries before 9pm, then a chance of flurries between 9pm and 11pm. Partly cloudy, with a low around 24. Northwest wind 11 to 14 mph, with gusts as high as 28 mph.

    Low: 24 °F

    Chance
    Sprinkles/Flurries
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 38. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.

    High: 38 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 25. Southwest wind 3 to 7 mph.

    Low: 25 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 51.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 40 percent chance of rain, mainly after 4am. Mostly cloudy, with a low around 36. Light and variable wind becoming northwest 5 to 7 mph after midnight.
Saturday
A chance of rain before 9am, then a chance of sprinkles after 4pm. Cloudy through mid morning, then gradual clearing, with a high near 46. Northwest wind 10 to 16 mph, with gusts as high as 24 mph. Chance of precipitation is 30%.
Saturday Night
A chance of sprinkles and flurries before 9pm, then a chance of flurries between 9pm and 11pm. Partly cloudy, with a low around 24. Northwest wind 11 to 14 mph, with gusts as high as 28 mph.
Sunday
Sunny, with a high near 38. Northwest wind 7 to 14 mph, with gusts as high as 24 mph.
Sunday Night
Mostly clear, with a low around 25. Southwest wind 3 to 7 mph.
Monday
Sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 35.
Tuesday
Partly sunny, with a high near 56.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Mostly cloudy, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 21.
Thursday
Mostly sunny, with a high near 36.
Thursday Night
Partly cloudy, with a low around 25.
Friday
Mostly cloudy, with a high near 43.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.93°N 90.42°W (Elev. 427 ft)
Last Update:
4:51 pm CST Jan 9, 2026
Forecast Valid:
8pm CST Jan 9, 2026-6pm CST Jan 16, 2026
 
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