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.

Thunderstorm

75°F

24°C

Humidity 90%
Wind Speed Calm
Barometer 30.05 in (1016.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Last update 7 Aug 9:54 pm CDT
Extended Forecast for

Lake St. Louis MO

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 4am. Partly cloudy, with a low around 73. Southeast wind around 6 mph.

    Low: 73 °F

    Slight Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 96. Heat index values as high as 103. South wind 6 to 10 mph, with gusts as high as 20 mph.

    High: 96 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. South wind 7 to 9 mph.

    Low: 76 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 95. Heat index values as high as 103. South wind 7 to 10 mph.

    High: 95 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 74. South wind around 7 mph.

    Low: 74 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.

    Low: 73 °F

    Slight Chance
    T-storms

  • Monday

    Monday: A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    Showers

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms before 4am. Partly cloudy, with a low around 73. Southeast wind around 6 mph.
Friday
Sunny, with a high near 96. Heat index values as high as 103. South wind 6 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 76. South wind 7 to 9 mph.
Saturday
Sunny, with a high near 95. Heat index values as high as 103. South wind 7 to 10 mph.
Saturday Night
Partly cloudy, with a low around 74. South wind around 7 mph.
Sunday
Mostly sunny, with a high near 92.
Sunday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 92.
Monday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 90.
Tuesday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Wednesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
Wednesday Night
Partly cloudy, with a low around 71.
Thursday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake St. Louis MO
 38.79°N 90.79°W (Elev. 512 ft)
Last Update:
9:56 pm CDT Aug 7, 2025
Forecast Valid:
10pm CDT Aug 7, 2025-6pm CDT Aug 14, 2025
 
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