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

34°F

1°C

Humidity 31%
Wind Speed SW 8 mph
Barometer 30.15 in (1022.0 mb)
Dewpoint 6°F (-14°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 20 Jan 11:51 pm CST
Extended Forecast for

Greendale MO

  • Overnight

    Overnight: Mostly cloudy, with a low around 31. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 31 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy through mid morning, then gradual clearing, with a high near 42. West wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 42 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 25. Southwest wind 7 to 11 mph becoming northwest after midnight. Winds could gust as high as 23 mph.

    Low: 25 °F

    Mostly Clear

  • Thursday

    Thursday: Partly sunny, with a high near 37. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 37 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 10. Light north wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 22 mph.

    Low: 10 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy and cold, with a high near 15.

    High: 15 °F

    Cold

  • Friday Night

    Friday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 4.

    Low: 4 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Saturday

    Saturday: A 40 percent chance of snow. Cloudy and cold, with a high near 14.

    High: 14 °F

    Chance Snow

  • Saturday Night

    Saturday Night: A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 9.

    Low: 9 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly cloudy, with a low around 31. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
Mostly cloudy through mid morning, then gradual clearing, with a high near 42. West wind 9 to 11 mph, with gusts as high as 21 mph.
Wednesday Night
Mostly clear, with a low around 25. Southwest wind 7 to 11 mph becoming northwest after midnight. Winds could gust as high as 23 mph.
Thursday
Partly sunny, with a high near 37. Northwest wind around 5 mph becoming calm in the afternoon.
Thursday Night
Mostly cloudy, with a low around 10. Light north wind increasing to 8 to 13 mph in the evening. Winds could gust as high as 22 mph.
Friday
Mostly cloudy and cold, with a high near 15.
Friday Night
A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 4.
Saturday
A 40 percent chance of snow. Cloudy and cold, with a high near 14.
Saturday Night
A 40 percent chance of snow, mainly before midnight. Mostly cloudy, with a low around 9.
Sunday
Partly sunny, with a high near 22.
Sunday Night
Partly cloudy, with a low around 7.
Monday
Mostly sunny, with a high near 26.
Monday Night
Mostly clear, with a low around 12.
Tuesday
Mostly sunny, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Greendale MO
 38.69°N 90.31°W (Elev. 594 ft)
Last Update:
11:16 pm CST Jan 20, 2026
Forecast Valid:
12am CST Jan 21, 2026-6pm CST Jan 27, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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