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

78°F

26°C

Humidity 42%
Wind Speed SE 8 mph
Barometer 30.03 in (1016.8 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 29 Sep 10:53 am CDT
Extended Forecast for

Lemay MO

  • This Afternoon

    This Afternoon: Sunny, with a high near 84. South wind around 7 mph.

    High: 84 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 65. South wind 3 to 6 mph.

    Low: 65 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 90. South wind 5 to 8 mph.

    High: 90 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 71. South wind around 8 mph.

    Low: 71 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 89. South wind 7 to 10 mph.

    High: 89 °F

    Mostly Cloudy
    then Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.

    Low: 67 °F

    Chance
    Showers then
    Showers
    Likely

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

    High: 74 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers. Mostly cloudy, with a low around 59.

    Low: 59 °F

    Chance
    Showers

  • Saturday

    Saturday: A 40 percent chance of showers. Mostly cloudy, with a high near 70.

    High: 70 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Sunny, with a high near 84. South wind around 7 mph.
Tonight
Increasing clouds, with a low around 65. South wind 3 to 6 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 90. South wind 5 to 8 mph.
Wednesday Night
Mostly cloudy, with a low around 71. South wind around 8 mph.
Thursday
A 40 percent chance of showers after 1pm. Mostly cloudy, with a high near 89. South wind 7 to 10 mph.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 67. Chance of precipitation is 70%.
Friday
Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers. Mostly cloudy, with a low around 59.
Saturday
A 40 percent chance of showers. Mostly cloudy, with a high near 70.
Saturday Night
A 30 percent chance of showers, mainly after 1am. Mostly cloudy, with a low around 59.
Sunday
Partly sunny, with a high near 70.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 70.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lemay MO
 38.53°N 90.29°W (Elev. 456 ft)
Last Update:
5:46 am CDT Sep 29, 2026
Forecast Valid:
12pm CDT Sep 29, 2026-6pm CDT Oct 5, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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