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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

Lemay MO

  • Today

    Today: Sunny, with a high near 82. South wind 6 to 13 mph, with gusts as high as 22 mph.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 60. South wind 6 to 9 mph.

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of rain and thunderstorms before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 83. South wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.

    High: 83 °F

    Mostly Sunny
    then Chance
    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 57. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.

    Low: 57 °F

    Rain Likely
    then Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. Temperature rising to near 65 by 10am, then falling to around 51 during the remainder of the day. Southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.

    High: 65 °F⇓

    Rain

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 82. South wind 6 to 13 mph, with gusts as high as 22 mph.
Tonight
Mostly clear, with a low around 60. South wind 6 to 9 mph.
Tuesday
A slight chance of rain and thunderstorms before 1pm, then a chance of rain between 1pm and 4pm, then a chance of rain and thunderstorms after 4pm. Increasing clouds, with a high near 83. South wind 6 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 57. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 90%.
Wednesday
Rain and possibly a thunderstorm. Temperature rising to near 65 by 10am, then falling to around 51 during the remainder of the day. Southwest wind 10 to 16 mph becoming northwest in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 100%.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
Sunny, with a high near 56.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
Partly sunny, with a high near 65.
Friday Night
Partly cloudy, with a low around 39.
Saturday
Mostly sunny, with a high near 68.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 50.
Sunday
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a high near 70.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lemay MO
 38.53°N 90.26°W (Elev. 381 ft)
Last Update:
1:26 am CDT Mar 9, 2026
Forecast Valid:
4am CDT Mar 9, 2026-6pm CDT Mar 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