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

Hazardous Weather Conditions

Current conditions at

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

Lat: 38.66°NLon: 90.66°WElev: 463ft.

Mostly Cloudy

80°F

27°C

Humidity 79%
Wind Speed Vrbl 5 mph
Barometer 30.00 in (1015.1 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 13 Jul 1:54 pm CDT
Extended Forecast for

Lake St. Louis MO

  • This Afternoon

    This Afternoon: Showers and thunderstorms likely, mainly before 4pm. Cloudy, with a high near 82. Calm wind becoming east around 5 mph. Chance of precipitation is 70%.

    High: 82 °F

    T-storms
    Likely

  • Tonight

    Tonight: A 30 percent chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 5am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Chance
    T-storms then
    Patchy Fog

  • Monday

    Monday: Patchy fog before 7am. Otherwise, partly sunny, with a high near 86. Light and variable wind.

    High: 86 °F

    Patchy Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 70. Southeast wind around 6 mph becoming calm in the evening.

    Low: 70 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon.

    High: 89 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Slight Chance
    T-storms

  • Wednesday

    Wednesday: A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91.

    High: 91 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    T-storms

  • Thursday

    Thursday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

Detailed Forecast

This Afternoon
Showers and thunderstorms likely, mainly before 4pm. Cloudy, with a high near 82. Calm wind becoming east around 5 mph. Chance of precipitation is 70%.
Tonight
A 30 percent chance of showers and thunderstorms, mainly before 7pm. Patchy fog after 5am. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 68. Calm wind.
Monday
Patchy fog before 7am. Otherwise, partly sunny, with a high near 86. Light and variable wind.
Monday Night
Partly cloudy, with a low around 70. Southeast wind around 6 mph becoming calm in the evening.
Tuesday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 89. Calm wind becoming south around 6 mph in the afternoon.
Tuesday Night
A 20 percent chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 71.
Wednesday
A 40 percent chance of showers and thunderstorms, mainly after 1pm. Mostly sunny, with a high near 91.
Wednesday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Partly cloudy, with a low around 71.
Thursday
A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 88.
Thursday Night
A 30 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 69.
Friday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 85.
Friday Night
A 20 percent chance of showers and thunderstorms. Partly cloudy, with a low around 70.
Saturday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 89.
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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:
12:21 pm CDT Jul 13, 2025
Forecast Valid:
2pm CDT Jul 13, 2025-6pm CDT Jul 19, 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