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.

Overcast

45°F

7°C

Humidity 77%
Wind Speed W 16 G 26 mph
Barometer 29.99 in (1015.5 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 9 Jan 7:51 am CST
Extended Forecast for

Cool Valley MO

  • Today

    Today: Mostly cloudy, with a high near 50. West wind 6 to 13 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph.

    High: 50 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 3am and 5am. Increasing clouds, with a low around 37. Calm wind becoming northwest around 6 mph after midnight.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 47. West wind 7 to 14 mph, with gusts as high as 24 mph.

    High: 47 °F

    Slight Chance
    Rain then
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26. Northwest wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 37. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.

    High: 37 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 28.

    Low: 28 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 52.

    High: 52 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 56.

    High: 56 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 50. West wind 6 to 13 mph becoming northeast in the afternoon. Winds could gust as high as 22 mph.
Tonight
A 30 percent chance of rain, mainly between 3am and 5am. Increasing clouds, with a low around 37. Calm wind becoming northwest around 6 mph after midnight.
Saturday
A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 47. West wind 7 to 14 mph, with gusts as high as 24 mph.
Saturday Night
Partly cloudy, with a low around 26. Northwest wind 10 to 14 mph, with gusts as high as 25 mph.
Sunday
Sunny, with a high near 37. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.
Sunday Night
Mostly clear, with a low around 28.
Monday
Sunny, with a high near 52.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 56.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
A 20 percent chance of rain. Mostly cloudy, with a high near 43.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Mostly sunny, with a high near 39.
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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:
6:21 am CST Jan 9, 2026
Forecast Valid:
8am CST Jan 9, 2026-6pm CST Jan 15, 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