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

59°F

15°C

Humidity 56%
Wind Speed S 7 mph
Barometer 29.91 in (1012.5 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 15 May 3:53 am CDT
Extended Forecast for

Mehlville MO

  • Overnight

    Overnight: A 30 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 58. South wind around 8 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Chance
    T-storms

  • Friday

    Friday: A 30 percent chance of showers and thunderstorms, mainly before 8am. Partly sunny, with a high near 86. Southeast wind around 10 mph, with gusts as high as 22 mph.

    High: 86 °F

    Chance
    T-storms then
    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 67. South wind around 8 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Mostly Cloudy
    then Slight
    Chance
    T-storms

  • Saturday

    Saturday: Showers and thunderstorms likely, mainly before noon. Mostly cloudy, with a high near 85. South wind around 7 mph. Chance of precipitation is 60%.

    High: 85 °F

    Showers
    Likely then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 65. South wind 6 to 8 mph.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny
    then Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.

    Low: 71 °F

    Chance
    Showers then
    Chance
    T-storms

Detailed Forecast

Overnight
A 30 percent chance of showers and thunderstorms after 5am. Partly cloudy, with a low around 58. South wind around 8 mph, with gusts as high as 20 mph.
Friday
A 30 percent chance of showers and thunderstorms, mainly before 8am. Partly sunny, with a high near 86. Southeast wind around 10 mph, with gusts as high as 22 mph.
Friday Night
A slight chance of showers, with thunderstorms also possible after 4am. Mostly cloudy, with a low around 67. South wind around 8 mph. Chance of precipitation is 20%.
Saturday
Showers and thunderstorms likely, mainly before noon. Mostly cloudy, with a high near 85. South wind around 7 mph. Chance of precipitation is 60%.
Saturday Night
Partly cloudy, with a low around 65. South wind 6 to 8 mph.
Sunday
Sunny, with a high near 91.
Sunday Night
Mostly clear, with a low around 71.
Monday
A 40 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 91.
Monday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 71.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 87. Chance of precipitation is 70%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 61. Chance of precipitation is 60%.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
Wednesday Night
A 20 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Thursday
A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mehlville MO
 38.51°N 90.32°W (Elev. 548 ft)
Last Update:
1:26 am CDT May 15, 2026
Forecast Valid:
4am CDT May 15, 2026-6pm CDT May 21, 2026
 
Forecast Discussion
 
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Additional Resources

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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