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.

Fog

33°F

1°C

Humidity 100%
Wind Speed SW 6 mph
Barometer 30.21 in (1023.0 mb)
Dewpoint 33°F (1°C)
Visibility 0.25 mi
Wind Chill27°F (-3°C)
Last update 2 Nov 2:54 am CST
Extended Forecast for

5 Miles NNW Hazelwood MO

Dense Fog Advisory until November 2, 09:00am
Freeze Warning November 2, 03:04am until November 2, 08:00am
Click here for hazard details and duration
Dense Fog Advisory
Freeze Warning
  •  
    Dense Fog Advisory until November 2, 09:00am
    Freeze Warning November 2, 03:04am until November 2, 08:00am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • Overnight

    Low: 32 °F

    Frost and
    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 8am. Widespread frost before 8am. Otherwise, sunny, with a high near 55. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 55 °F

    Frost and
    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Patchy frost after 5am. Otherwise, mostly clear, with a low around 36. South wind 3 to 6 mph.

    Low: 36 °F

    Clear then
    Patchy Frost

  • Monday

    Monday: Sunny, with a high near 65. West wind 5 to 9 mph becoming light and variable in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

Overnight
Patchy fog after 4am. Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. Calm wind.
Sunday
Patchy fog before 8am. Widespread frost before 8am. Otherwise, sunny, with a high near 55. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Patchy frost after 5am. Otherwise, mostly clear, with a low around 36. South wind 3 to 6 mph.
Monday
Sunny, with a high near 65. West wind 5 to 9 mph becoming light and variable in the afternoon.
Monday Night
Partly cloudy, with a low around 41. Calm wind.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 50.
Wednesday
Sunny, with a high near 70.
Wednesday Night
Mostly clear, with a low around 42.
Thursday
Sunny, with a high near 68.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 54.
Friday
A 20 percent chance of rain and thunderstorms. Mostly sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 48.
Saturday
A 20 percent chance of rain. Mostly sunny, with a high near 70.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NNW Hazelwood MO
 38.85°N 90.39°W (Elev. 430 ft)
Last Update:
2:26 am CST Nov 2, 2025
Forecast Valid:
3am CST Nov 2, 2025-6pm CST Nov 8, 2025
 
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