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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

67°F

19°C

Humidity 81%
Wind Speed E 7 mph
Barometer 29.91 in (1012.3 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 21 Jun 12:54 am CDT
Extended Forecast for

2 Miles SSE St. Charles County Smartt Airport MO

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • Overnight

    Overnight: Mostly cloudy, with a low around 69. East wind 5 to 7 mph.

    Low: 69 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers and thunderstorms. High near 84. East wind 10 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 80%.

    High: 84 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms, mainly before 1am. Low around 62. Southwest wind 9 to 13 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.

    Low: 62 °F

    T-storms then
    Chance
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 77. North wind 11 to 13 mph.

    High: 77 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60. North wind 5 to 8 mph becoming calm in the evening.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 84.

    High: 84 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 69. East wind 5 to 7 mph.
Sunday
Showers and thunderstorms. High near 84. East wind 10 to 17 mph becoming southwest in the afternoon. Winds could gust as high as 29 mph. Chance of precipitation is 80%.
Sunday Night
Showers and thunderstorms, mainly before 1am. Low around 62. Southwest wind 9 to 13 mph becoming north after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 90%.
Monday
Mostly cloudy, with a high near 77. North wind 11 to 13 mph.
Monday Night
Partly cloudy, with a low around 60. North wind 5 to 8 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
A 30 percent chance of showers and thunderstorms, mainly before 1pm. Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 84.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Friday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
Friday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 67.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 88.
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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:
1:26 am CDT Jun 21, 2026
Forecast Valid:
1am CDT Jun 21, 2026-6pm CDT Jun 27, 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