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Hazardous Weather Conditions

Current conditions at

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

Lat: 38.93°NLon: 90.43°WElev: 436ft.

Fair

17°F

-8°C

Humidity 62%
Wind Speed Calm
Barometer 30.34 in (1027.9 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Last update 22 Jan 6:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

Winter Storm Watch January 24, 12:00am until January 25, 12:00pm
Cold Weather Advisory January 24, 12:00am until January 24, 12:00pm
Click here for hazard details and duration
Winter Storm Watch
Cold Weather Advisory

  • Today

    Today: Partly sunny, with a high near 38. West wind 3 to 7 mph.

    High: 38 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 8. Light northwest wind becoming north 10 to 15 mph in the evening. Winds could gust as high as 23 mph.

    Low: 8 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a temperature falling to around 8 by 5pm. North wind 13 to 16 mph, with gusts as high as 24 mph.

    High: 11 °F⇓

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 1. Wind chill values as low as -15. Northeast wind around 11 mph.

    Low: 1 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: Snow likely, mainly after noon. Cloudy and cold, with a high near 13. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 13 °F

    Chance Snow
    then Snow
    Likely

  • Saturday Night

    Saturday Night: Snow. Low around 5. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.

    Low: 5 °F

    Snow

  • Sunday

    Sunday: A 30 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 15.

    High: 15 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around -2.

    Low: -2 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 21.

    High: 21 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 38. West wind 3 to 7 mph.
Tonight
Mostly cloudy, with a low around 8. Light northwest wind becoming north 10 to 15 mph in the evening. Winds could gust as high as 23 mph.
Friday
Mostly cloudy and cold, with a temperature falling to around 8 by 5pm. North wind 13 to 16 mph, with gusts as high as 24 mph.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 1. Wind chill values as low as -15. Northeast wind around 11 mph.
Saturday
Snow likely, mainly after noon. Cloudy and cold, with a high near 13. Northeast wind around 10 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Saturday Night
Snow. Low around 5. Chance of precipitation is 80%. New snow accumulation of 2 to 4 inches possible.
Sunday
A 30 percent chance of snow, mainly before noon. Mostly cloudy and cold, with a high near 15.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Sunny, with a high near 21.
Monday Night
Mostly clear, with a low around 8.
Tuesday
Mostly sunny, with a high near 32.
Tuesday Night
Mostly cloudy, with a low around 12.
Wednesday
Partly sunny, with a high near 30.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
St. Charles County Smartt Airport MO
 38.94°N 90.45°W (Elev. 427 ft)
Last Update:
4:46 am CST Jan 22, 2026
Forecast Valid:
7am CST Jan 22, 2026-6pm CST Jan 28, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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