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.

Heavy Rain Fog/Mist

45°F

7°C

Humidity 97%
Wind Speed E 8 mph
Barometer 29.94 in (1013.9 mb)
Dewpoint 44°F (7°C)
Visibility 2.50 mi
Wind Chill41°F (5°C)
Last update 14 Feb 2:53 pm CST
Extended Forecast for

Lemay MO

  • This Afternoon

    This Afternoon: Rain. High near 51. East wind around 7 mph. Chance of precipitation is 100%.

    High: 51 °F

    Rain

  • Tonight

    Tonight: Rain, mainly before 4am. Low around 45. East wind around 8 mph becoming northeast after midnight. Chance of precipitation is 100%.

    Low: 45 °F

    Rain

  • Sunday

    Sunday: A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 59. North wind 3 to 8 mph.

    High: 59 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 39. Calm wind.

    Low: 39 °F

    Mostly Clear

  • Washington's Birthday

    Washington's Birthday: Mostly sunny, with a high near 65. Calm wind becoming south 5 to 8 mph in the morning.

    High: 65 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 46.

    Low: 46 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 68.

    High: 68 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 59.

    Low: 59 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Rain. High near 51. East wind around 7 mph. Chance of precipitation is 100%.
Tonight
Rain, mainly before 4am. Low around 45. East wind around 8 mph becoming northeast after midnight. Chance of precipitation is 100%.
Sunday
A 20 percent chance of rain before 7am. Cloudy through mid morning, then gradual clearing, with a high near 59. North wind 3 to 8 mph.
Sunday Night
Mostly clear, with a low around 39. Calm wind.
Washington's Birthday
Mostly sunny, with a high near 65. Calm wind becoming south 5 to 8 mph in the morning.
Monday Night
Mostly cloudy, with a low around 46.
Tuesday
Mostly cloudy, with a high near 68.
Tuesday Night
Mostly cloudy, with a low around 59.
Wednesday
Mostly sunny, with a high near 72.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
A 30 percent chance of rain. Mostly sunny, with a high near 71.
Thursday Night
A 20 percent chance of rain. Partly cloudy, with a low around 41.
Friday
A 20 percent chance of rain. Mostly sunny, with a high near 56.
Friday Night
A 20 percent chance of snow. Partly cloudy, with a low around 33.
Saturday
Mostly sunny, with a high near 52.
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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:
2:46 pm CST Feb 14, 2026
Forecast Valid:
3pm CST Feb 14, 2026-6pm CST Feb 21, 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