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.

Fair

22°F

-6°C

Humidity 57%
Wind Speed N 18 G 30 mph
Barometer 30.51 in (1033.8 mb)
Dewpoint 9°F (-13°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 23 Feb 12:53 am CST
Extended Forecast for

Mehlville MO

  • Overnight

    Overnight: Partly cloudy, with a low around 15. Northwest wind 11 to 13 mph, with gusts as high as 23 mph.

    Low: 15 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, then gradually becoming sunny, with a high near 34. Northwest wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 21 mph.

    High: 34 °F

    Becoming
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 21. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 21 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 54. South wind 9 to 16 mph, with gusts as high as 31 mph.

    High: 54 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.

    Low: 38 °F

    Slight Chance
    Rain then
    Rain Likely

  • Thursday

    Thursday: A 40 percent chance of rain before noon. Partly sunny, with a high near 49.

    High: 49 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31.

    Low: 31 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a low around 15. Northwest wind 11 to 13 mph, with gusts as high as 23 mph.
Monday
Partly sunny, then gradually becoming sunny, with a high near 34. Northwest wind 6 to 11 mph becoming light in the afternoon. Winds could gust as high as 21 mph.
Monday Night
Mostly clear, with a low around 21. Calm wind becoming south 5 to 7 mph after midnight.
Tuesday
Partly sunny, with a high near 54. South wind 9 to 16 mph, with gusts as high as 31 mph.
Tuesday Night
Mostly cloudy, with a low around 35. Southwest wind 6 to 11 mph becoming light and variable after midnight. Winds could gust as high as 22 mph.
Wednesday
Mostly sunny, with a high near 53.
Wednesday Night
A slight chance of rain, then rain likely and possibly a thunderstorm after midnight. Mostly cloudy, with a low around 38. Chance of precipitation is 60%.
Thursday
A 40 percent chance of rain before noon. Partly sunny, with a high near 49.
Thursday Night
Mostly clear, with a low around 31.
Friday
Sunny, with a high near 63.
Friday Night
Clear, with a low around 40.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 35.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 51.
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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:
12:25 am CST Feb 23, 2026
Forecast Valid:
1am CST Feb 23, 2026-6pm CST Mar 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation