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.

A Few Clouds

83°F

28°C

Humidity 49%
Wind Speed SW 3 mph
Barometer 30.00 in (1015.5 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 20 Jun 11:53 am CDT
Extended Forecast for

Lemay MO

Flood Watch June 21, 07:00am until June 22, 01:00am
Click here for hazard details and duration
Flood Watch

  • This Afternoon

    This Afternoon: Sunny, with a high near 86. Light northwest wind.

    High: 86 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 68. North wind around 5 mph becoming calm in the evening.

    Low: 68 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Showers and thunderstorms, mainly before 3pm. High near 85. South wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.

    High: 85 °F

    T-storms

  • Sunday Night

    Sunday Night: Showers and thunderstorms before 4am, then isolated showers. Low around 67. Southwest wind 7 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

    Low: 67 °F

    T-storms then
    Scattered
    T-storms

  • Monday

    Monday: A slight chance of showers and thunderstorms between 7am and 1pm. Mostly cloudy, with a high near 79. North wind around 8 mph. Chance of precipitation is 20%.

    High: 79 °F

    Slight Chance
    T-storms

  • Monday Night

    Monday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 86. Light northwest wind.
Tonight
Increasing clouds, with a low around 68. North wind around 5 mph becoming calm in the evening.
Sunday
Showers and thunderstorms, mainly before 3pm. High near 85. South wind 6 to 13 mph, with gusts as high as 26 mph. Chance of precipitation is 80%.
Sunday Night
Showers and thunderstorms before 4am, then isolated showers. Low around 67. Southwest wind 7 to 10 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.
Monday
A slight chance of showers and thunderstorms between 7am and 1pm. Mostly cloudy, with a high near 79. North wind around 8 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 62.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
Partly cloudy, with a low around 64.
Thursday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 83.
Thursday Night
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 64.
Friday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 84.
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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:
11:26 am CDT Jun 20, 2026
Forecast Valid:
12pm CDT Jun 20, 2026-6pm CDT Jun 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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