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.

Fair

81°F

27°C

Humidity 85%
Wind Speed Calm
Barometer 30.01 in (1015.4 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 30 Jul 9:54 pm CDT
Extended Forecast for

Lake St. Louis MO

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind becoming northwest 5 to 7 mph after midnight.

    Low: 70 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms. Cloudy, with a high near 76. North wind 8 to 11 mph. Chance of precipitation is 40%.

    High: 76 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A 20 percent chance of showers before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 61. North wind 7 to 10 mph.

    Low: 61 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 79. Northeast wind 7 to 10 mph.

    High: 79 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 58. Northeast wind 5 to 9 mph.

    Low: 58 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 59.

    Low: 59 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

Detailed Forecast

Tonight
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind becoming northwest 5 to 7 mph after midnight.
Thursday
A chance of showers and thunderstorms. Cloudy, with a high near 76. North wind 8 to 11 mph. Chance of precipitation is 40%.
Thursday Night
A 20 percent chance of showers before 10pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 61. North wind 7 to 10 mph.
Friday
Mostly sunny, with a high near 79. Northeast wind 7 to 10 mph.
Friday Night
Partly cloudy, with a low around 58. Northeast wind 5 to 9 mph.
Saturday
Sunny, with a high near 78.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
Sunny, with a high near 81.
Sunday Night
Partly cloudy, with a low around 63.
Monday
A 20 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 84.
Monday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 66.
Tuesday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake St. Louis MO
 38.79°N 90.79°W (Elev. 512 ft)
Last Update:
10:26 pm CDT Jul 30, 2025
Forecast Valid:
10pm CDT Jul 30, 2025-6pm CDT Aug 6, 2025
 
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