Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Fair

100°F

38°C

Humidity 37%
Wind Speed SW 10 G 22 mph
Barometer 29.85 in (1010.3 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Heat Index107°F (42°C)
Last update 25 Jun 12:53 pm CDT
Extended Forecast for

Arnold MO

Heat Advisory until June 25, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until June 25, 08:00pm

    NOW until 8:00pm Tue

    Heat Advisory

  • This Afternoon

    High: 101 °F

    Hot

  • Tonight

    Tonight: A 50 percent chance of showers and thunderstorms, mainly after 1am.  Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph becoming northeast after midnight.

    Low: 72 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms before 4pm, then a slight chance of showers. Some of the storms could produce heavy rainfall.  High near 87. East wind 6 to 9 mph becoming west in the morning.  Chance of precipitation is 90%.

    High: 87 °F

    Heavy Rain
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 66. North wind 5 to 7 mph becoming calm  in the evening.

    Low: 66 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Calm wind becoming east around 5 mph in the afternoon.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 69.

    Low: 69 °F

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers and thunderstorms before 1pm.  Partly sunny, with a high near 93.

    High: 93 °F

    Slight Chance
    T-storms

  • Friday Night

    Friday Night: A 30 percent chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 78.

    Low: 78 °F

    Chance
    T-storms

Detailed Forecast

This Afternoon
Mostly sunny and hot, with a high near 101. Heat index values as high as 109. Southwest wind around 11 mph, with gusts as high as 20 mph.
Tonight
A 50 percent chance of showers and thunderstorms, mainly after 1am. Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph becoming northeast after midnight.
Wednesday
Showers and thunderstorms before 4pm, then a slight chance of showers. Some of the storms could produce heavy rainfall. High near 87. East wind 6 to 9 mph becoming west in the morning. Chance of precipitation is 90%.
Wednesday Night
Mostly clear, with a low around 66. North wind 5 to 7 mph becoming calm in the evening.
Thursday
Sunny, with a high near 89. Calm wind becoming east around 5 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 69.
Friday
A 20 percent chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 93.
Friday Night
A 30 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 78.
Saturday
A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 95.
Saturday Night
A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 72.
Sunday
A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 87.
Sunday Night
Partly cloudy, with a low around 67.
Monday
A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 91.
Click Map For Forecast

ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.38°W (Elev. 495 ft)
1:07 pm CDT Jun 25, 2024
2pm CDT Jun 25, 2024-6pm CDT Jul 1, 2024
 
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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