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

90°F

32°C

Humidity 34%
Wind Speed S 8 mph
Barometer 30.14 in (1020.2 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index89°F (32°C)
Last update 3 Oct 3:53 pm CDT
Extended Forecast for

4 Miles NW Arnold MO

  • Tonight

    Tonight: Mostly clear, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87. Calm wind becoming south 5 to 9 mph in the morning.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 57. South wind 3 to 6 mph.

    Low: 57 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 87. South wind 5 to 10 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 62. South wind around 6 mph becoming calm after midnight.

    Low: 62 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 86. Chance of precipitation is 30%.

    High: 86 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 63.

    Low: 63 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 30%.

    High: 80 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 87. Calm wind becoming south 5 to 9 mph in the morning.
Saturday Night
Clear, with a low around 57. South wind 3 to 6 mph.
Sunday
Sunny, with a high near 87. South wind 5 to 10 mph.
Sunday Night
Mostly clear, with a low around 62. South wind around 6 mph becoming calm after midnight.
Monday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Monday Night
A 40 percent chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 63.
Tuesday
A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 57.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 52.
Thursday
Sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 50.
Friday
Sunny, with a high near 80.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Arnold MO
 38.47°N 90.41°W (Elev. 397 ft)
Last Update:
4:16 pm CDT Oct 3, 2025
Forecast Valid:
4pm CDT Oct 3, 2025-6pm CDT Oct 10, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation