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.

Partly Cloudy

69°F

21°C

Humidity 70%
Wind Speed E 5 mph
Barometer 29.91 in (1012.1 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 21 Jun 3:54 am CDT
Extended Forecast for

4 Miles SE Silex MO

Flood Watch June 21, 04:38am until June 21, 07:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch June 21, 04:38am until June 21, 07:00pm

    NOW until 7:00pm Sun

    Flood Watch

  • Overnight

    Low: 68 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms. High near 80. Southeast wind 8 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%.

    High: 80 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before midnight. Low around 60. Southwest wind 5 to 7 mph becoming north after midnight. Chance of precipitation is 80%.

    Low: 60 °F

    T-storms then
    Slight Chance
    T-storms

  • Monday

    Monday: Cloudy, then gradually becoming mostly sunny, with a high near 76. North wind around 7 mph.

    High: 76 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. Light northeast wind.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 83.

    High: 83 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Mostly cloudy, with a low around 68. Light east wind.
Sunday
Showers and thunderstorms. High near 80. Southeast wind 8 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 80%.
Sunday Night
Showers and thunderstorms, mainly before midnight. Low around 60. Southwest wind 5 to 7 mph becoming north after midnight. Chance of precipitation is 80%.
Monday
Cloudy, then gradually becoming mostly sunny, with a high near 76. North wind around 7 mph.
Monday Night
Partly cloudy, with a low around 58. Light northeast wind.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 82.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 61.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 87.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Silex MO
 39.08°N 91.01°W (Elev. 482 ft)
Last Update:
3:11 am CDT Jun 21, 2026
Forecast Valid:
4am CDT Jun 21, 2026-6pm CDT Jun 27, 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