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

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Partly Cloudy

81°F

27°C

Humidity 61%
Wind Speed W 14 G 25 mph
Barometer 29.91 in (1012.0 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 15 Oct 4:54 pm CDT
Extended Forecast for

Lake St. Louis MO

  • This Afternoon

    This Afternoon: A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79. West wind around 10 mph.

    High: 79 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Increasing clouds, with a low around 45. Northwest wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.

    Low: 45 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Friday

    Friday: Partly sunny, with a high near 56. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 29 mph.

    High: 56 °F

    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 37. North wind 6 to 14 mph, with gusts as high as 25 mph.

    Low: 37 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 59. Light and variable wind.

    High: 59 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 36.

    Low: 36 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 71.

    High: 71 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 79. West wind around 10 mph.
Tonight
Showers and thunderstorms likely before 1am, then a slight chance of showers between 1am and 2am. Increasing clouds, with a low around 45. Northwest wind 8 to 16 mph, with gusts as high as 25 mph. Chance of precipitation is 70%.
Friday
Partly sunny, with a high near 56. Breezy, with a northwest wind 15 to 20 mph, with gusts as high as 29 mph.
Friday Night
Mostly cloudy, with a low around 37. North wind 6 to 14 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 59. Light and variable wind.
Saturday Night
Clear, with a low around 36.
Sunday
Sunny, with a high near 67.
Sunday Night
Mostly clear, with a low around 39.
Monday
Mostly sunny, with a high near 71.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 75.
Tuesday Night
Mostly clear, with a low around 47.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly clear, with a low around 50.
Thursday
Sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lake St. Louis MO
 38.79°N 90.76°W (Elev. 545 ft)
Last Update:
2:26 pm CDT Oct 15, 2026
Forecast Valid:
5pm CDT Oct 15, 2026-6pm CDT Oct 22, 2026
 
Forecast Discussion
 
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Additional Resources

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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