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

29°F

-2°C

Humidity 75%
Wind Speed NE 7 mph
Barometer 30.01 in (1017.2 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill22°F (-6°C)
Last update 3 Jan 3:51 am CST
Extended Forecast for

Cool Valley MO

  • Overnight

    Overnight: A chance of sprinkles and flurries. Cloudy, with a low around 29. Northeast wind around 6 mph.

    Low: 29 °F

    Chance
    Sprinkles/Flurries

  • Saturday

    Saturday: A chance of sprinkles and flurries before 7am. Cloudy through mid morning, then gradual clearing, with a high near 39. Northwest wind 5 to 7 mph.

    High: 39 °F

    Chance
    Sprinkles/Flurries
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 26. North wind around 6 mph becoming calm in the evening.

    Low: 26 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 40. Calm wind becoming southeast 5 to 7 mph in the afternoon.

    High: 40 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 33. South wind 6 to 8 mph.

    Low: 33 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39.

    Low: 39 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of sprinkles and flurries. Cloudy, with a low around 29. Northeast wind around 6 mph.
Saturday
A chance of sprinkles and flurries before 7am. Cloudy through mid morning, then gradual clearing, with a high near 39. Northwest wind 5 to 7 mph.
Saturday Night
Mostly clear, with a low around 26. North wind around 6 mph becoming calm in the evening.
Sunday
Partly sunny, with a high near 40. Calm wind becoming southeast 5 to 7 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 33. South wind 6 to 8 mph.
Monday
Sunny, with a high near 56.
Monday Night
Partly cloudy, with a low around 44.
Tuesday
Mostly sunny, with a high near 62.
Tuesday Night
Mostly cloudy, with a low around 39.
Wednesday
Partly sunny, with a high near 60.
Wednesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 48.
Thursday
Rain likely. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of rain. Partly cloudy, with a low around 49.
Friday
A 20 percent chance of rain. Partly sunny, with a high near 58.
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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:
3:51 am CST Jan 3, 2026
Forecast Valid:
3am CST Jan 3, 2026-6pm CST Jan 9, 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