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

76°F

24°C

Humidity 77%
Wind Speed W 5 mph
Barometer 30.00 in (1015.3 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 14 Oct 1:54 pm CDT
Extended Forecast for

Lake St. Louis MO

  • This Afternoon

    This Afternoon: A slight chance of showers and thunderstorms. Cloudy, with a high near 76. Light northwest wind. Chance of precipitation is 20%.

    High: 76 °F

    Slight Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 66. Light east wind. Chance of precipitation is 60%.

    Low: 66 °F

    Cloudy then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. High near 81. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 90%.

    High: 81 °F

    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Mostly cloudy, with a low around 48. Northwest wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.

    Low: 48 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 56. Breezy, with a northwest wind 17 to 20 mph, with gusts as high as 31 mph.

    High: 56 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 61.

    High: 61 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
A slight chance of showers and thunderstorms. Cloudy, with a high near 76. Light northwest wind. Chance of precipitation is 20%.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 66. Light east wind. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm, mainly before 11am, then a chance of showers and thunderstorms after 11am. High near 81. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 90%.
Thursday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers between 2am and 3am. Mostly cloudy, with a low around 48. Northwest wind 7 to 15 mph, with gusts as high as 24 mph. Chance of precipitation is 50%.
Friday
A 20 percent chance of showers after 1pm. Mostly cloudy, with a high near 56. Breezy, with a northwest wind 17 to 20 mph, with gusts as high as 31 mph.
Friday Night
Mostly cloudy, with a low around 39.
Saturday
Sunny, with a high near 61.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 68.
Sunday Night
Mostly clear, with a low around 41.
Monday
Mostly sunny, with a high near 73.
Monday Night
Partly cloudy, with a low around 45.
Tuesday
Mostly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lake St. Louis MO
 38.79°N 90.79°W (Elev. 512 ft)
Last Update:
2:06 pm CDT Oct 14, 2026
Forecast Valid:
2pm CDT Oct 14, 2026-6pm CDT Oct 20, 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