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.

Overcast

78°F

26°C

Humidity 64%
Wind Speed NW 8 G 24 mph
Barometer 29.97 in (1013.7 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 14 Oct 12:54 am CDT
Extended Forecast for

Lake St. Louis MO

  • Overnight

    Overnight: Showers and thunderstorms. Low around 71. Northwest wind 5 to 7 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.

    Low: 71 °F

    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and noon, then a chance of showers and thunderstorms after noon. High near 76. North wind 3 to 6 mph. Chance of precipitation is 80%.

    High: 76 °F

    T-storms then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Cloudy, with a low around 65. North wind around 6 mph becoming light and variable. Chance of precipitation is 40%.

    Low: 65 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 10am. High near 81. East wind 6 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 90%.

    High: 81 °F

    Showers and
    Patchy Fog
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 47. Northwest wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.

    Low: 47 °F

    Showers

  • Friday

    Friday: Mostly sunny, with a high near 59. Breezy.

    High: 59 °F

    Mostly Sunny
    and Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 38.

    Low: 38 °F

    Clear

Detailed Forecast

Overnight
Showers and thunderstorms. Low around 71. Northwest wind 5 to 7 mph, with gusts as high as 22 mph. Chance of precipitation is 80%.
Wednesday
Showers and thunderstorms before 10am, then showers likely and possibly a thunderstorm between 10am and noon, then a chance of showers and thunderstorms after noon. High near 76. North wind 3 to 6 mph. Chance of precipitation is 80%.
Wednesday Night
A slight chance of showers, then a chance of showers and thunderstorms after 10pm. Cloudy, with a low around 65. North wind around 6 mph becoming light and variable. Chance of precipitation is 40%.
Thursday
Showers and thunderstorms before 1pm, then showers likely and possibly a thunderstorm between 1pm and 2pm, then a chance of showers and thunderstorms after 2pm. Patchy fog before 10am. High near 81. East wind 6 to 9 mph becoming southwest in the afternoon. Chance of precipitation is 90%.
Thursday Night
Showers and possibly a thunderstorm before 1am, then a chance of showers. Low around 47. Northwest wind 6 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%.
Friday
Mostly sunny, with a high near 59. Breezy.
Friday Night
Mostly clear, with a low around 38.
Saturday
Sunny, with a high near 62.
Saturday Night
Clear, with a low around 38.
Sunday
Sunny, with a high near 70.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 78.
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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 am CDT Oct 14, 2026
Forecast Valid:
1am 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