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

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Overcast

30°F

-1°C

Humidity 64%
Wind Speed N 10 mph
Barometer 30.21 in (1023.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 21 Feb 8:53 am CST
Extended Forecast for

Lemay MO

  • Today

    Today: A slight chance of snow showers before 10am, then a chance of flurries between 10am and noon. Mostly cloudy, with a high near 42. Northwest wind 7 to 10 mph. Chance of precipitation is 20%.

    High: 42 °F

    Slight Chance
    Snow Showers
    then Partly
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 23. Northwest wind 8 to 15 mph, with gusts as high as 24 mph.

    Low: 23 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 35. Northwest wind 14 to 16 mph, with gusts as high as 30 mph.

    High: 35 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 17. Northwest wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 17 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 34. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 54.

    High: 54 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 41.

    Low: 41 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

Detailed Forecast

Today
A slight chance of snow showers before 10am, then a chance of flurries between 10am and noon. Mostly cloudy, with a high near 42. Northwest wind 7 to 10 mph. Chance of precipitation is 20%.
Tonight
Mostly clear, with a low around 23. Northwest wind 8 to 15 mph, with gusts as high as 24 mph.
Sunday
Sunny, with a high near 35. Northwest wind 14 to 16 mph, with gusts as high as 30 mph.
Sunday Night
Mostly clear, with a low around 17. Northwest wind 11 to 14 mph, with gusts as high as 24 mph.
Monday
Sunny, with a high near 34. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.
Monday Night
Mostly clear, with a low around 20.
Tuesday
Partly sunny, with a high near 54.
Tuesday Night
Mostly cloudy, with a low around 41.
Wednesday
Partly sunny, with a high near 63.
Wednesday Night
A 30 percent chance of rain, mainly before midnight. Mostly cloudy, with a low around 38.
Thursday
A 20 percent chance of rain. Mostly sunny, with a high near 54.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 64.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lemay MO
 38.53°N 90.29°W (Elev. 456 ft)
Last Update:
8:31 am CST Feb 21, 2026
Forecast Valid:
9am CST Feb 21, 2026-6pm CST Feb 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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