National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

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: A 30 percent chance of rain after 4pm. Increasing clouds, with a high near 66. East wind around 7 mph becoming south in the afternoon.

    High: 66 °F

    Mostly Sunny
    then Chance
    Rain

  • Tonight

    Tonight: A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 31. Southeast wind 5 to 11 mph becoming northwest in the evening. Winds could gust as high as 21 mph.

    Low: 31 °F

    Slight Chance
    Rain then
    Mostly Clear

  • Sunday

    Sunday: Mostly cloudy, with a high near 46. North wind around 9 mph.

    High: 46 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Snow likely before 3am, then rain and snow likely. Cloudy, with a low around 32. East wind around 8 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.

    Low: 32 °F

    Snow Likely
    then
    Rain/Snow
    Likely

  • Monday

    Monday: A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 44. East wind 7 to 9 mph. Chance of precipitation is 40%.

    High: 44 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Rain. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Rain

  • Tuesday

    Tuesday: Rain and possibly a thunderstorm. High near 61. Chance of precipitation is 90%.

    High: 61 °F

    Rain

  • Tuesday Night

    Tuesday Night: Rain, with thunderstorms also possible after midnight. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Rain

  • Wednesday

    Wednesday: Rain likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 70%.

    High: 66 °F

    Rain Likely

Detailed Forecast

Today
A 30 percent chance of rain after 4pm. Increasing clouds, with a high near 66. East wind around 7 mph becoming south in the afternoon.
Tonight
A 20 percent chance of rain before 7pm. Partly cloudy, with a low around 31. Southeast wind 5 to 11 mph becoming northwest in the evening. Winds could gust as high as 21 mph.
Sunday
Mostly cloudy, with a high near 46. North wind around 9 mph.
Sunday Night
Snow likely before 3am, then rain and snow likely. Cloudy, with a low around 32. East wind around 8 mph. Chance of precipitation is 70%. New snow accumulation of less than one inch possible.
Monday
A chance of rain and snow before 9am, then a chance of rain. Cloudy, with a high near 44. East wind 7 to 9 mph. Chance of precipitation is 40%.
Monday Night
Rain. Low around 37. Chance of precipitation is 80%.
Tuesday
Rain and possibly a thunderstorm. High near 61. Chance of precipitation is 90%.
Tuesday Night
Rain, with thunderstorms also possible after midnight. Low around 50. Chance of precipitation is 80%.
Wednesday
Rain likely and possibly a thunderstorm. Cloudy, with a high near 66. Chance of precipitation is 70%.
Wednesday Night
Rain likely and possibly a thunderstorm before midnight, then a chance of rain. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Thursday
A 50 percent chance of rain. Partly sunny, with a high near 71.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 56.
Friday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 73. Chance of precipitation is 60%.
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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:
7:56 am CST Feb 28, 2026
Forecast Valid:
9am CST Feb 28, 2026-6pm CST Mar 6, 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