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

78°F

26°C

Humidity 82%
Wind Speed Calm
Barometer 29.95 in (1013.6 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Jun 6:53 am CDT
Extended Forecast for

Arnold MO

  • Today

    Today: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 95. Heat index values as high as 103. South wind 5 to 13 mph, with gusts as high as 21 mph.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 74. South wind 7 to 10 mph, with gusts as high as 21 mph.

    Low: 74 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 92. South wind 9 to 14 mph, with gusts as high as 22 mph.

    High: 92 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 74. South wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 74 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 93. South wind 3 to 7 mph.

    High: 93 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 72.

    Low: 72 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 96.

    High: 96 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny and hot, with a high near 98.

    High: 98 °F

    Hot

Detailed Forecast

Today
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Increasing clouds, with a high near 95. Heat index values as high as 103. South wind 5 to 13 mph, with gusts as high as 21 mph.
Tonight
A 20 percent chance of showers and thunderstorms before 9pm. Mostly cloudy, with a low around 74. South wind 7 to 10 mph, with gusts as high as 21 mph.
Tuesday
A 20 percent chance of showers and thunderstorms after 8am. Mostly sunny, with a high near 92. South wind 9 to 14 mph, with gusts as high as 22 mph.
Tuesday Night
Partly cloudy, with a low around 74. South wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Juneteenth
Mostly sunny, with a high near 93. South wind 3 to 7 mph.
Wednesday Night
Partly cloudy, with a low around 72.
Thursday
Mostly sunny, with a high near 96.
Thursday Night
Partly cloudy, with a low around 73.
Friday
Mostly sunny and hot, with a high near 98.
Friday Night
Partly cloudy, with a low around 75.
Saturday
Mostly sunny and hot, with a high near 99.
Saturday Night
Partly cloudy, with a low around 76.
Sunday
A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 94.
Click Map For Forecast
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.38°W (Elev. 495 ft)
Last Update:
6:22 am CDT Jun 17, 2024
Forecast Valid:
7am CDT Jun 17, 2024-6pm CDT Jun 23, 2024
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation