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

70°F

21°C

Humidity 73%
Wind Speed S 12 G 26 mph
Barometer 29.75 in (1007.4 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 9 Mar 6:53 pm CDT
Extended Forecast for

Lemay MO

  • Tonight

    Tonight: Mostly clear, with a low around 61. South wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 82. South wind 7 to 13 mph, with gusts as high as 23 mph.

    High: 82 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 50 percent chance of rain and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56. South wind 10 to 13 mph, with gusts as high as 25 mph.

    Low: 56 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm before 7am, then showers and possibly a thunderstorm between 7am and 1pm, then showers likely after 1pm. Temperature rising to near 65 by 10am, then falling to around 51 during the remainder of the day. Southwest wind 10 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.

    High: 65 °F⇓

    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 35. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.

    Low: 35 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Thursday Night

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

    Low: 45 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 65.

    High: 65 °F

    Mostly Cloudy

  • Friday Night

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

    Low: 41 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 61. South wind 7 to 10 mph, with gusts as high as 21 mph.
Tuesday
Partly sunny, with a high near 82. South wind 7 to 13 mph, with gusts as high as 23 mph.
Tuesday Night
A 50 percent chance of rain and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 56. South wind 10 to 13 mph, with gusts as high as 25 mph.
Wednesday
Rain likely and possibly a thunderstorm before 7am, then showers and possibly a thunderstorm between 7am and 1pm, then showers likely after 1pm. Temperature rising to near 65 by 10am, then falling to around 51 during the remainder of the day. Southwest wind 10 to 14 mph becoming northwest in the afternoon. Winds could gust as high as 26 mph. Chance of precipitation is 90%.
Wednesday Night
Mostly cloudy, with a low around 35. Northwest wind 6 to 14 mph, with gusts as high as 25 mph.
Thursday
Sunny, with a high near 55.
Thursday Night
Mostly cloudy, with a low around 45.
Friday
Mostly cloudy, with a high near 65.
Friday Night
Mostly cloudy, with a low around 41.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
A 50 percent chance of rain. Mostly cloudy, with a high near 67.
Sunday Night
A chance of rain and snow. Partly cloudy, with a low around 29. Chance of precipitation is 30%.
Monday
Mostly sunny, with a high near 42.
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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:
5:51 pm CDT Mar 9, 2026
Forecast Valid:
7pm CDT Mar 9, 2026-6pm CDT Mar 16, 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