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.

Fair

65°F

18°C

Humidity 76%
Wind Speed SE 6 mph
Barometer 29.73 in (1006.4 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 22 Mar 12:53 am CDT
Extended Forecast for

Lemay MO

  • Overnight

    Overnight: Mostly clear, with a low around 64. South wind around 7 mph.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 90. South wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.

    High: 90 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 39. North wind 10 to 18 mph, with gusts as high as 31 mph.

    Low: 39 °F

    Decreasing
    Clouds

  • Monday

    Monday: Mostly sunny, with a high near 58. Northeast wind 7 to 10 mph.

    High: 58 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42. East wind 3 to 5 mph.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 75.

    High: 75 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 20%.

    Low: 57 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 64. South wind around 7 mph.
Sunday
Increasing clouds, with a high near 90. South wind 6 to 11 mph becoming northwest in the afternoon. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 39. North wind 10 to 18 mph, with gusts as high as 31 mph.
Monday
Mostly sunny, with a high near 58. Northeast wind 7 to 10 mph.
Monday Night
Mostly cloudy, with a low around 42. East wind 3 to 5 mph.
Tuesday
Mostly sunny, with a high near 65.
Tuesday Night
Mostly cloudy, with a low around 47.
Wednesday
Partly sunny, with a high near 75.
Wednesday Night
A slight chance of rain and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 20%.
Thursday
A 20 percent chance of rain and thunderstorms after 1pm. Sunny, with a high near 86.
Thursday Night
A 40 percent chance of rain and thunderstorms. Partly cloudy, with a low around 46.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 57.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 38.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 57.
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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:
9:51 pm CDT Mar 21, 2026
Forecast Valid:
1am CDT Mar 22, 2026-6pm CDT Mar 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation