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

66°F

19°C

Humidity 84%
Wind Speed Calm
Barometer 30.11 in (1019.4 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 15 Oct 9:53 pm CDT
Extended Forecast for

3 Miles WSW Arnold MO

  • Tonight

    Tonight: Mostly clear, with a low around 59. East wind around 6 mph becoming calm after midnight.

    Low: 59 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 82. Calm wind becoming southeast 5 to 8 mph in the morning.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 58. Southeast wind around 7 mph, with gusts as high as 20 mph.

    Low: 58 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 82. South wind 6 to 8 mph.

    High: 82 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. South wind around 7 mph.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.

    High: 77 °F

    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Sunday

    Sunday: A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 64.

    High: 64 °F

    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Clear, with a low around 43.

    Low: 43 °F

    Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 59. East wind around 6 mph becoming calm after midnight.
Thursday
Sunny, with a high near 82. Calm wind becoming southeast 5 to 8 mph in the morning.
Thursday Night
Partly cloudy, with a low around 58. Southeast wind around 7 mph, with gusts as high as 20 mph.
Friday
Partly sunny, with a high near 82. South wind 6 to 8 mph.
Friday Night
Partly cloudy, with a low around 64. South wind around 7 mph.
Saturday
Showers and possibly a thunderstorm. High near 77. Chance of precipitation is 80%.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Sunday
A 20 percent chance of showers before 1pm. Mostly sunny, with a high near 64.
Sunday Night
Clear, with a low around 43.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 51.
Tuesday
A 20 percent chance of showers. Sunny, with a high near 74.
Tuesday Night
A 20 percent chance of showers. Mostly clear, with a low around 48.
Wednesday
Mostly sunny, with a high near 69.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Arnold MO
 38.4°N 90.41°W (Elev. 656 ft)
Last Update:
7:21 pm CDT Oct 15, 2025
Forecast Valid:
10pm CDT Oct 15, 2025-6pm CDT Oct 22, 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