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Hazardous Weather Conditions

Current conditions at

St. Louis Downtown Airport (KCPS)

Lat: 38.56°NLon: 90.15°WElev: 410ft.

Mostly Cloudy

75°F

24°C

Humidity 84%
Wind Speed Vrbl 6 mph
Barometer 29.98 in (1014.8 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 16 Jun 12:53 pm CDT
Extended Forecast for

Arnold MO

  • This Afternoon

    This Afternoon: A 40 percent chance of showers and thunderstorms, mainly before 3pm. Mostly cloudy, with a high near 82. Light southeast wind.

    High: 82 °F

    Chance
    T-storms

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 90. Light southwest wind.

    High: 90 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Partly cloudy, with a low around 72. South wind 3 to 5 mph. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms then
    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 89. Southwest wind 6 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    High: 89 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Juneteenth

    Juneteenth: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

This Afternoon
A 40 percent chance of showers and thunderstorms, mainly before 3pm. Mostly cloudy, with a high near 82. Light southeast wind.
Tonight
Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 68. Calm wind.
Tuesday
Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 90. Light southwest wind.
Tuesday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and midnight. Partly cloudy, with a low around 72. South wind 3 to 5 mph. Chance of precipitation is 20%.
Wednesday
A chance of showers, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 89. Southwest wind 6 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Wednesday Night
A 50 percent chance of showers and thunderstorms before 1am. Mostly cloudy, with a low around 68.
Juneteenth
Sunny, with a high near 87.
Thursday Night
Mostly clear, with a low around 68.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 75.
Saturday
Sunny, with a high near 96.
Saturday Night
Mostly clear, with a low around 76.
Sunday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.35°W (Elev. 400 ft)
Last Update:
12:22 pm CDT Jun 16, 2025
Forecast Valid:
1pm CDT Jun 16, 2025-6pm CDT Jun 22, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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