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.

Light Snow

9°F

-13°C

Humidity 73%
Wind Speed N 17 G 23 mph
Barometer 30.14 in (1021.4 mb)
Dewpoint 2°F (-17°C)
Visibility 2.50 mi
Wind Chill-9°F (-23°C)
Last update 25 Jan 10:54 am CST
Extended Forecast for

St. Charles County Smartt Airport MO

Extreme Cold Warning January 26, 12:00am until January 26, 12:00pm
Winter Storm Warning January 25, 11:02am until January 25, 06:00pm
Click here for hazard details and duration
Extreme Cold Warning
Winter Storm Warning
  •  
    Winter Storm Warning January 25, 11:02am until January 25, 06:00pm

    NOW until 6:00pm Sun

    Winter Storm Warning

  • Today

    High: 15 °F

    Snow

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming clear, with a low around -8. Wind chill values as low as -20. Northwest wind 8 to 11 mph.

    Low: -8 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny and cold, with a high near 15. Wind chill values as low as -25. West wind 8 to 11 mph.

    High: 15 °F

    Cold

  • Monday Night

    Monday Night: Mostly clear, with a low around 3. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.

    Low: 3 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 28. West wind 8 to 14 mph becoming northwest in the afternoon.

    High: 28 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around -3.

    Low: -3 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 23.

    High: 23 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: -2 °F

    Partly Cloudy

Detailed Forecast

Today
Snow, mainly before 2pm. High near 15. Northwest wind 13 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 2 to 4 inches possible.
Tonight
Mostly cloudy, then gradually becoming clear, with a low around -8. Wind chill values as low as -20. Northwest wind 8 to 11 mph.
Monday
Sunny and cold, with a high near 15. Wind chill values as low as -25. West wind 8 to 11 mph.
Monday Night
Mostly clear, with a low around 3. Southwest wind 8 to 11 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 28. West wind 8 to 14 mph becoming northwest in the afternoon.
Tuesday Night
Partly cloudy, with a low around -3.
Wednesday
Mostly sunny, with a high near 23.
Wednesday Night
Partly cloudy, with a low around -2.
Thursday
Partly sunny and cold, with a high near 18.
Thursday Night
Mostly cloudy, with a low around 4.
Friday
Partly sunny and cold, with a high near 19.
Friday Night
Partly cloudy, with a low around 0.
Saturday
Mostly sunny, with a high near 22.
Basemap Options
Click map to change the forecast location
Loading map...
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:
10:31 am CST Jan 25, 2026
Forecast Valid:
11am CST Jan 25, 2026-6pm CST Jan 31, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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