National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Mostly Cloudy

84°F

29°C

Humidity 48%
Wind Speed Vrbl 5 mph
Barometer 29.97 in (1013.9 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 20 Jun 2:54 pm CDT
Extended Forecast for

Ellisville 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: Isolated showers and thunderstorms. Mostly sunny, with a high near 86. Calm wind. Chance of precipitation is 20%.

    High: 86 °F

    Isolated
    T-storms

  • Tonight

    Tonight: Increasing clouds, with a low around 67. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 67 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Showers and thunderstorms, mainly before 3pm. High near 83. Southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.

    High: 83 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 4am, then isolated showers. Low around 65. Southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.

    Low: 65 °F

    T-storms then
    Scattered
    T-storms

  • Monday

    Monday: Mostly cloudy, with a high near 77. North wind around 8 mph.

    High: 77 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Tuesday Night

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

    Low: 62 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Isolated showers and thunderstorms. Mostly sunny, with a high near 86. Calm wind. Chance of precipitation is 20%.
Tonight
Increasing clouds, with a low around 67. Light and variable wind becoming southeast around 5 mph after midnight.
Sunday
Showers and thunderstorms, mainly before 3pm. High near 83. Southeast wind 6 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 90%.
Sunday Night
Showers and thunderstorms before 4am, then isolated showers. Low around 65. Southwest wind around 9 mph, with gusts as high as 20 mph. Chance of precipitation is 90%.
Monday
Mostly cloudy, with a high near 77. North wind around 8 mph.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Mostly sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Mostly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 62.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.
Thursday Night
A 20 percent chance of showers. Partly cloudy, with a low around 62.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Friday Night
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.
Saturday
A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ellisville MO
 38.58°N 90.57°W (Elev. 696 ft)
Last Update:
2:51 pm CDT Jun 20, 2026
Forecast Valid:
3pm CDT Jun 20, 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