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.

Overcast

61°F

16°C

Humidity 90%
Wind Speed S 7 mph
Barometer 29.82 in (1009.6 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 16 Apr 4:53 am CDT
Extended Forecast for

Lemay MO

  • Overnight

    Overnight: A 30 percent chance of showers. Cloudy, with a low around 63. Southwest wind around 6 mph.

    Low: 63 °F

    Chance
    Showers

  • Thursday

    Thursday: Cloudy through mid morning, then gradual clearing, with a high near 83. Southwest wind around 7 mph.

    High: 83 °F

    Gradual
    Clearing

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 61. Light south wind.

    Low: 61 °F

    Mostly Clear

  • Friday

    Friday: A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 13 mph, with gusts as high as 24 mph.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: Showers and thunderstorms, mainly before 4am, then showers and possibly a thunderstorm after 4am. Low around 51. South wind 9 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.

    Low: 51 °F

    T-storms
    Likely then
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms. Partly sunny, with a steady temperature around 56. Chance of precipitation is 50%.

    High: 56 °F

    Chance
    T-storms then
    Chance
    Showers

  • Saturday Night

    Saturday Night: A 20 percent chance of showers before 1am. Mostly clear, with a low around 41.

    Low: 41 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

Detailed Forecast

Overnight
A 30 percent chance of showers. Cloudy, with a low around 63. Southwest wind around 6 mph.
Thursday
Cloudy through mid morning, then gradual clearing, with a high near 83. Southwest wind around 7 mph.
Thursday Night
Mostly clear, with a low around 61. Light south wind.
Friday
A 50 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 86. South wind 5 to 13 mph, with gusts as high as 24 mph.
Friday Night
Showers and thunderstorms, mainly before 4am, then showers and possibly a thunderstorm after 4am. Low around 51. South wind 9 to 11 mph becoming west after midnight. Winds could gust as high as 21 mph. Chance of precipitation is 90%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a steady temperature around 56. Chance of precipitation is 50%.
Saturday Night
A 20 percent chance of showers before 1am. Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 66.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Mostly sunny, with a high near 77.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 56.
Wednesday
A 20 percent chance of showers and thunderstorms. Sunny, with a high near 80.
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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:
3:06 am CDT Apr 16, 2026
Forecast Valid:
5am CDT Apr 16, 2026-6pm CDT Apr 22, 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