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

64°F

18°C

Humidity 34%
Wind Speed SE 6 mph
Barometer 29.88 in (1012.2 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 7 Jan 3:54 pm CST
Extended Forecast for

Lake St. Louis MO

  • Tonight

    Tonight: Mostly cloudy, with a low around 46. South wind around 7 mph.

    Low: 46 °F

    Mostly Cloudy

  • Thursday

    Thursday: Rain likely before noon, then showers, mainly after 3pm. High near 65. Southeast wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 80%.

    High: 65 °F

    Showers

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 49. South wind 9 to 16 mph becoming west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%.

    Low: 49 °F

    Showers
    Likely then
    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 54. West wind 6 to 9 mph becoming north in the afternoon.

    High: 54 °F

    Partly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 37. Light north wind becoming northwest 5 to 9 mph after midnight.

    Low: 37 °F

    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before noon. Partly sunny, with a high near 43.

    High: 43 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 35.

    High: 35 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 22.

    Low: 22 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 46. South wind around 7 mph.
Thursday
Rain likely before noon, then showers, mainly after 3pm. High near 65. Southeast wind 6 to 11 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 80%.
Thursday Night
Showers likely and possibly a thunderstorm before 9pm, then showers likely between 9pm and midnight. Cloudy, then gradually becoming partly cloudy, with a low around 49. South wind 9 to 16 mph becoming west after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%.
Friday
Partly sunny, with a high near 54. West wind 6 to 9 mph becoming north in the afternoon.
Friday Night
A 40 percent chance of rain, mainly after midnight. Mostly cloudy, with a low around 37. Light north wind becoming northwest 5 to 9 mph after midnight.
Saturday
A 20 percent chance of rain before noon. Partly sunny, with a high near 43.
Saturday Night
Partly cloudy, with a low around 24.
Sunday
Sunny, with a high near 35.
Sunday Night
Mostly clear, with a low around 22.
Monday
Sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 32.
Tuesday
Mostly sunny, with a high near 52.
Tuesday Night
Mostly cloudy, with a low around 34.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 43.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lake St. Louis MO
 38.79°N 90.79°W (Elev. 512 ft)
Last Update:
4:31 pm CST Jan 7, 2026
Forecast Valid:
4pm CST Jan 7, 2026-6pm CST Jan 14, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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