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

  • Tonight

    Tonight: Mostly clear, with a low around 30. North wind 8 to 11 mph.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 50. Northeast wind around 11 mph.

    High: 50 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Rain, snow, and sleet, becoming all rain after 2am. Low around 35. East wind 7 to 10 mph. Chance of precipitation is 90%. New snow and sleet accumulation of less than a half inch possible.

    Low: 35 °F

    Wintry Mix

  • Monday

    Monday: Rain likely, mainly before noon. Cloudy, with a high near 45. East wind 6 to 8 mph. Chance of precipitation is 60%.

    High: 45 °F

    Rain Likely
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 40. Southeast wind around 6 mph. Chance of precipitation is 80%.

    Low: 40 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm before 9am, then rain between 9am and noon, then rain likely and possibly a thunderstorm after noon. High near 66. Chance of precipitation is 80%.

    High: 66 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain and possibly a thunderstorm. Low around 54. Chance of precipitation is 80%.

    Low: 54 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm. High near 69. Chance of precipitation is 80%.

    High: 69 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.

    Low: 54 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 30. North wind 8 to 11 mph.
Sunday
Increasing clouds, with a high near 50. Northeast wind around 11 mph.
Sunday Night
Rain, snow, and sleet, becoming all rain after 2am. Low around 35. East wind 7 to 10 mph. Chance of precipitation is 90%. New snow and sleet accumulation of less than a half inch possible.
Monday
Rain likely, mainly before noon. Cloudy, with a high near 45. East wind 6 to 8 mph. Chance of precipitation is 60%.
Monday Night
Rain. Low around 40. Southeast wind around 6 mph. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm before 9am, then rain between 9am and noon, then rain likely and possibly a thunderstorm after noon. High near 66. Chance of precipitation is 80%.
Tuesday Night
Rain and possibly a thunderstorm. Low around 54. Chance of precipitation is 80%.
Wednesday
Rain and possibly a thunderstorm. High near 69. Chance of precipitation is 80%.
Wednesday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 54. Chance of precipitation is 70%.
Thursday
Rain likely. Partly sunny, with a high near 71. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of rain and thunderstorms. Mostly cloudy, with a low around 57.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.
Friday Night
Rain likely and possibly a thunderstorm. Mostly cloudy, with a low around 55. Chance of precipitation is 70%.
Saturday
Rain likely. Mostly cloudy, with a high near 68. Chance of precipitation is 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:
10:01 pm CST Feb 28, 2026
Forecast Valid:
10pm CST Feb 28, 2026-6pm CST Mar 7, 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