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

81°F

27°C

Humidity 53%
Wind Speed NW 6 mph
Barometer 29.99 in (1014.9 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 20 Jun 1:54 pm CDT
Extended Forecast for

4 Miles NE Saint Charles MO

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

  • This Afternoon

    This Afternoon: Sunny, with a high near 85. Northwest wind 3 to 5 mph.

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 69. North wind around 6 mph becoming light and variable.

    Low: 69 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Showers and thunderstorms. High near 84. Southeast wind 8 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%.

    High: 84 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 3am, then isolated showers. Some of the storms could produce heavy rainfall. Low around 65. Southwest wind 9 to 13 mph becoming northwest in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

    Low: 65 °F

    Heavy Rain
    then
    Scattered
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 78. North wind 9 to 11 mph.

    High: 78 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 1am. Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 85. Northwest wind 3 to 5 mph.
Tonight
Increasing clouds, with a low around 69. North wind around 6 mph becoming light and variable.
Sunday
Showers and thunderstorms. High near 84. Southeast wind 8 to 15 mph becoming southwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 90%.
Sunday Night
Showers and thunderstorms before 3am, then isolated showers. Some of the storms could produce heavy rainfall. Low around 65. Southwest wind 9 to 13 mph becoming northwest in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 90%.
Monday
Mostly cloudy, with a high near 78. North wind 9 to 11 mph.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 81.
Tuesday Night
A 20 percent chance of showers after 1am. Mostly clear, with a low around 63.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Thursday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 63.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NE Saint Charles MO
 38.83°N 90.48°W (Elev. 443 ft)
Last Update:
1:26 pm CDT Jun 20, 2026
Forecast Valid:
2pm CDT Jun 20, 2026-6pm CDT Jun 26, 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