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.

Fair

75°F

24°C

Humidity 29%
Wind Speed N 15 G 25 mph
Barometer 30.03 in (1016.7 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 13 May 2:53 pm CDT
Extended Forecast for

Mehlville MO

  • Tonight

    Tonight: Clear, with a low around 45. North wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.

    Low: 45 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 75. Calm wind becoming southeast 5 to 8 mph in the morning.

    High: 75 °F

    Sunny

  • Thursday Night

    Thursday Night: A 30 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 56. Southeast wind around 8 mph.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. South wind around 10 mph, with gusts as high as 23 mph.

    High: 84 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 66. South wind 6 to 8 mph. Chance of precipitation is 40%.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.

    High: 87 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

Detailed Forecast

Tonight
Clear, with a low around 45. North wind 6 to 11 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 75. Calm wind becoming southeast 5 to 8 mph in the morning.
Thursday Night
A 30 percent chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 56. Southeast wind around 8 mph.
Friday
A 40 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 84. South wind around 10 mph, with gusts as high as 23 mph.
Friday Night
A chance of showers between 1am and 4am, then a chance of showers and thunderstorms after 4am. Partly cloudy, with a low around 66. South wind 6 to 8 mph. Chance of precipitation is 40%.
Saturday
Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.
Saturday Night
Partly cloudy, with a low around 65.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70.
Monday
A 30 percent chance of showers and thunderstorms after 1pm. Mostly sunny, with a high near 90.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 83. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers. Partly sunny, with a high near 79.
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ABOUT THIS FORECAST

 
Point Forecast:
Mehlville MO
 38.51°N 90.32°W (Elev. 548 ft)
Last Update:
2:56 pm CDT May 13, 2026
Forecast Valid:
3pm CDT May 13, 2026-6pm CDT May 20, 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