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.

Mostly Cloudy

26°F

-3°C

Humidity 48%
Wind Speed Calm
Barometer 30.41 in (1031.3 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Last update 23 Feb 7:51 pm CST
Extended Forecast for

Cool Valley MO

  • Tonight

    Tonight: Mostly clear, with a low around 24. Calm wind becoming south 5 to 8 mph after midnight.

    Low: 24 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 56. South wind 9 to 16 mph, with gusts as high as 36 mph.

    High: 56 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 54. Light and variable wind becoming north around 6 mph in the morning.

    High: 54 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after midnight. Mostly cloudy, with a low around 37. East wind around 7 mph. Chance of precipitation is 60%.

    Low: 37 °F

    Chance Rain
    then Rain
    Likely

  • Thursday

    Thursday: A 30 percent chance of rain before noon. Partly sunny, with a high near 50.

    High: 50 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 34.

    Low: 34 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 42.

    Low: 42 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 24. Calm wind becoming south 5 to 8 mph after midnight.
Tuesday
Partly sunny, with a high near 56. South wind 9 to 16 mph, with gusts as high as 36 mph.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind 5 to 10 mph becoming light and variable after midnight.
Wednesday
Mostly sunny, with a high near 54. Light and variable wind becoming north around 6 mph in the morning.
Wednesday Night
Rain likely, mainly after midnight. Mostly cloudy, with a low around 37. East wind around 7 mph. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain before noon. Partly sunny, with a high near 50.
Thursday Night
Mostly clear, with a low around 34.
Friday
Sunny, with a high near 64.
Friday Night
Clear, with a low around 42.
Saturday
Sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 34.
Sunday
A chance of rain and snow. Partly sunny, with a high near 48. Chance of precipitation is 30%.
Sunday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 33.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cool Valley MO
 38.73°N 90.28°W (Elev. 499 ft)
Last Update:
7:56 pm CST Feb 23, 2026
Forecast Valid:
8pm CST Feb 23, 2026-6pm CST Mar 2, 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