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.

Overcast

43°F

6°C

Humidity 89%
Wind Speed Calm
Barometer 30.15 in (1021.2 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 1 Nov 6:54 pm CDT
Extended Forecast for

2 Miles SSE St. Charles County Smartt Airport MO

Freeze Warning November 2, 01:00am until November 2, 07:00am
Click here for hazard details and duration
Freeze Warning

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm. Widespread frost, mainly after 4am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 31. Northwest wind around 6 mph becoming calm in the evening.

    Low: 31 °F

    Slight Chance
    Rain then
    Frost

  • Sunday

    Sunday: Patchy fog between 8am and 9am. Widespread frost before 9am. 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: Clear, with a low around 36. South wind 3 to 6 mph.

    Low: 36 °F

    Clear

  • Monday

    Monday: Areas of frost before 7am. Otherwise, sunny, with a high near 65. South wind 5 to 9 mph becoming west in the afternoon.

    High: 65 °F

    Areas Frost
    then 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

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

Detailed Forecast

Tonight
A 20 percent chance of rain before 10pm. Widespread frost, mainly after 4am. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 31. Northwest wind around 6 mph becoming calm in the evening.
Sunday
Patchy fog between 8am and 9am. Widespread frost before 9am. Otherwise, sunny, with a high near 55. Calm wind becoming southwest around 6 mph in the afternoon.
Sunday Night
Clear, with a low around 36. South wind 3 to 6 mph.
Monday
Areas of frost before 7am. Otherwise, sunny, with a high near 65. South wind 5 to 9 mph becoming west 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 41.
Thursday
Sunny, with a high near 67.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 53.
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.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE St. Charles County Smartt Airport MO
 38.91°N 90.42°W (Elev. 423 ft)
Last Update:
6:26 pm CDT Nov 1, 2025
Forecast Valid:
7pm CDT Nov 1, 2025-6pm CST Nov 8, 2025
 
Forecast Discussion
 
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