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.

Fair

48°F

9°C

Humidity 41%
Wind Speed N 8 mph
Barometer 30.04 in (1017.3 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 16 Nov 8:54 am CST
Extended Forecast for

Lake St. Louis MO

  • Today

    Today: Sunny, with a high near 58. North wind around 6 mph becoming calm in the afternoon.

    High: 58 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Increasing clouds, with a high near 58. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

    High: 58 °F

    Increasing
    Clouds

  • Monday Night

    Monday Night: A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 48. Southeast wind 7 to 10 mph. Chance of precipitation is 60%.

    Low: 48 °F

    Chance
    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A 20 percent chance of showers before noon. Partly sunny, with a high near 71. Southeast wind 6 to 9 mph becoming northwest in the afternoon.

    High: 71 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 49.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain. Mostly cloudy, with a high near 65.

    High: 65 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance Rain

  • Thursday

    Thursday: Rain and possibly a thunderstorm. High near 65. Chance of precipitation is 80%.

    High: 65 °F

    Rain

Detailed Forecast

Today
Sunny, with a high near 58. North wind around 6 mph becoming calm in the afternoon.
Tonight
Mostly clear, with a low around 36. Calm wind.
Monday
Increasing clouds, with a high near 58. Light east wind becoming southeast 6 to 11 mph in the morning. Winds could gust as high as 21 mph.
Monday Night
A chance of showers and thunderstorms before midnight, then showers likely and possibly a thunderstorm between midnight and 3am, then showers likely after 3am. Cloudy, then gradually becoming partly cloudy, with a low around 48. Southeast wind 7 to 10 mph. Chance of precipitation is 60%.
Tuesday
A 20 percent chance of showers before noon. Partly sunny, with a high near 71. Southeast wind 6 to 9 mph becoming northwest in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 49.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 65.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 51.
Thursday
Rain and possibly a thunderstorm. High near 65. Chance of precipitation is 80%.
Thursday Night
Rain likely, with thunderstorms also possible after midnight. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Friday
Rain likely. Partly sunny, with a high near 64. Chance of precipitation is 60%.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 53.
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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:
8:26 am CST Nov 16, 2025
Forecast Valid:
9am CST Nov 16, 2025-6pm CST Nov 22, 2025
 
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