National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Significant Coastal Impacts to the Eastern Seaboard; Tropical Storm Nolo to Impact Hawaii

A Nor'easter will bring significant coastal impacts to the Mid-Atlantic and New England through the weekend. Moderate to major coastal flooding, heavy rain, strong winds and high surf expected. Tropical Storm Nolo will continue to strengthen as it moves north toward the Big Island of Hawaii. Heavy rainfall may bring life-threatening, catastrophic flooding and mudslides through the weekend. Read More >

Current conditions at

St. Louis, Spirit Of St. Louis Airport (KSUS)

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Fog/Mist

58°F

14°C

Humidity 100%
Wind Speed Calm
Barometer 30.25 in (1024.3 mb)
Dewpoint 58°F (14°C)
Visibility 0.75 mi
Last update 25 Sep 7:54 am CDT
Extended Forecast for

Lake St. Louis MO

  • Today

    Today: Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 75. Light east wind.

    High: 75 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 61. Light east wind.

    Low: 61 °F

    Mostly Cloudy

  • Saturday

    Saturday: A 30 percent chance of showers, mainly after 10am. Mostly cloudy, with a high near 71. Light east wind.

    High: 71 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 75. Light east wind.

    High: 75 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 79.

    High: 79 °F

    Chance
    Showers

Detailed Forecast

Today
Patchy fog before 9am. Otherwise, mostly cloudy, with a high near 75. Light east wind.
Tonight
Mostly cloudy, with a low around 61. Light east wind.
Saturday
A 30 percent chance of showers, mainly after 10am. Mostly cloudy, with a high near 71. Light east wind.
Saturday Night
Mostly cloudy, with a low around 60. Calm wind.
Sunday
Mostly cloudy, with a high near 75. Light east wind.
Sunday Night
Partly cloudy, with a low around 61.
Monday
Mostly sunny, with a high near 77.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
A 40 percent chance of showers, mainly after 1pm. Partly sunny, with a high near 79.
Tuesday Night
A chance of showers, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Wednesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Wednesday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 65.
Thursday
A 50 percent chance of showers. Partly sunny, with a high near 79.
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:
6:36 am CDT Sep 25, 2026
Forecast Valid:
8am CDT Sep 25, 2026-6pm CDT Oct 1, 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