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

45°F

7°C

Humidity 39%
Wind Speed SW 8 mph
Barometer 30.12 in (1020.1 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 10 Jan 4:53 pm CST
Extended Forecast for

4 Miles WSW Arnold MO

  • Tonight

    Tonight: A chance of rain showers before 1am, then a chance of flurries between 1am and 5am. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. West wind 8 to 16 mph becoming northwest in the evening. Winds could gust as high as 34 mph. Chance of precipitation is 50%.

    Low: 26 °F

    Chance
    Showers then
    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 40. Northwest wind 6 to 15 mph, with gusts as high as 30 mph.

    High: 40 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 26. Calm wind becoming southwest around 6 mph after midnight.

    Low: 26 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 54. West wind 3 to 7 mph.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38. Calm wind becoming southwest 5 to 8 mph in the evening.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 20.

    Low: 20 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of rain showers before 1am, then a chance of flurries between 1am and 5am. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. West wind 8 to 16 mph becoming northwest in the evening. Winds could gust as high as 34 mph. Chance of precipitation is 50%.
Sunday
Sunny, with a high near 40. Northwest wind 6 to 15 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 26. Calm wind becoming southwest around 6 mph after midnight.
Monday
Sunny, with a high near 54. West wind 3 to 7 mph.
Monday Night
Mostly clear, with a low around 38. Calm wind becoming southwest 5 to 8 mph in the evening.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
Mostly cloudy, with a low around 38.
Wednesday
Mostly cloudy, with a high near 46.
Wednesday Night
Partly cloudy, with a low around 20.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 44.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Partly sunny, with a high near 36.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Arnold MO
 38.4°N 90.44°W (Elev. 525 ft)
Last Update:
4:41 pm CST Jan 10, 2026
Forecast Valid:
6pm CST Jan 10, 2026-6pm CST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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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