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

St. Louis Lambert International Airport (KSTL)

Lat: 38.75°NLon: 90.37°WElev: 604ft.

Fair

86°F

30°C

Humidity 43%
Wind Speed SW 14 mph
Barometer 29.96 in (1013.3 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 12 Oct 11:51 am CDT
Extended Forecast for

Cool Valley MO

  • Columbus Day

    Columbus Day: Sunny, with a high near 94. Southwest wind around 11 mph, with gusts as high as 21 mph.

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 72. Southwest wind 7 to 10 mph.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Southwest wind 6 to 9 mph.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 73. South wind 6 to 8 mph. Chance of precipitation is 60%.

    Low: 73 °F

    Mostly Clear
    then Showers
    Likely

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm. High near 81. West wind around 5 mph becoming light and variable in the afternoon. Chance of precipitation is 100%.

    High: 81 °F

    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.

    High: 82 °F

    Showers

  • Thursday Night

    Thursday Night: A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 55.

    Low: 55 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 64. Breezy.

    High: 64 °F

    Mostly Sunny
    and Breezy

Detailed Forecast

Columbus Day
Sunny, with a high near 94. Southwest wind around 11 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 72. Southwest wind 7 to 10 mph.
Tuesday
Sunny, with a high near 96. Southwest wind 6 to 9 mph.
Tuesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5am. Increasing clouds, with a low around 73. South wind 6 to 8 mph. Chance of precipitation is 60%.
Wednesday
Showers and possibly a thunderstorm. High near 81. West wind around 5 mph becoming light and variable in the afternoon. Chance of precipitation is 100%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 68. Chance of precipitation is 60%.
Thursday
Showers and possibly a thunderstorm. High near 82. Chance of precipitation is 90%.
Thursday Night
A 40 percent chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 55.
Friday
Mostly sunny, with a high near 64. Breezy.
Friday Night
Mostly clear, with a low around 42.
Saturday
Sunny, with a high near 62.
Saturday Night
Clear, with a low around 42.
Sunday
Sunny, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cool Valley MO
 38.73°N 90.31°W (Elev. 584 ft)
Last Update:
11:31 am CDT Oct 12, 2026
Forecast Valid:
12pm CDT Oct 12, 2026-6pm CDT Oct 18, 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