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.

A Few Clouds

91°F

33°C

Humidity 47%
Wind Speed SW 7 mph
Barometer 29.88 in (1011.0 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 13 Oct 1:54 pm CDT
Extended Forecast for

Lake St. Louis MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 94. Southwest wind around 8 mph.

    High: 94 °F

    Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 71. Light and variable wind becoming south around 6 mph. Chance of precipitation is 70%.

    Low: 71 °F

    Mostly Clear
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between 8am and 2pm. High near 76. Light and variable wind. Chance of precipitation is 90%.

    High: 76 °F

    Showers and
    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 70%.

    Low: 66 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 81. Light and variable wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 100%.

    High: 81 °F

    Showers

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 60. Breezy.

    High: 60 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 94. Southwest wind around 8 mph.
Tonight
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Increasing clouds, with a low around 71. Light and variable wind becoming south around 6 mph. Chance of precipitation is 70%.
Wednesday
Showers and possibly a thunderstorm, mainly before noon, then a chance of showers and thunderstorms after noon. Patchy fog between 8am and 2pm. High near 76. Light and variable wind. Chance of precipitation is 90%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 3am. Mostly cloudy, with a low around 66. Calm wind. Chance of precipitation is 70%.
Thursday
Showers and possibly a thunderstorm. High near 81. Light and variable wind becoming southwest 5 to 9 mph in the morning. Chance of precipitation is 100%.
Thursday Night
A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 60. Breezy.
Friday Night
Mostly clear, with a low around 36.
Saturday
Sunny, with a high near 63.
Saturday Night
Mostly clear, with a low around 38.
Sunday
Sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 74.
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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:
1:26 pm CDT Oct 13, 2026
Forecast Valid:
2pm CDT Oct 13, 2026-6pm CDT Oct 19, 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