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

Arnold MO

  • Tonight

    Tonight: A chance of rain and snow showers before 1am, then a chance of flurries between 1am and 5am.  Mostly cloudy, then gradually becoming mostly clear, with a low around 26. Southwest wind 6 to 11 mph becoming northwest 12 to 17 mph in the evening. Winds could gust as high as 34 mph.  Chance of precipitation is 50%.

    Low: 26 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Sunday

    Sunday: Sunny, with a high near 40. Northwest wind 6 to 14 mph, with gusts as high as 30 mph.

    High: 40 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 27. Calm wind becoming southwest around 6 mph after midnight.

    Low: 27 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 54. West wind 5 to 7 mph.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38. Southwest wind 3 to 7 mph.

    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 21.

    Low: 21 °F

    Partly Cloudy

Detailed Forecast

Tonight
A chance of rain and snow showers before 1am, then a chance of flurries between 1am and 5am. Mostly cloudy, then gradually becoming mostly clear, with a low around 26. Southwest wind 6 to 11 mph becoming northwest 12 to 17 mph 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 14 mph, with gusts as high as 30 mph.
Sunday Night
Clear, with a low around 27. Calm wind becoming southwest around 6 mph after midnight.
Monday
Sunny, with a high near 54. West wind 5 to 7 mph.
Monday Night
Mostly clear, with a low around 38. Southwest wind 3 to 7 mph.
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 21.
Thursday
Mostly sunny, with a high near 40.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Partly sunny, with a high near 45.
Friday Night
Mostly cloudy, with a low around 24.
Saturday
Partly sunny, with a high near 36.
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ABOUT THIS FORECAST

 
Point Forecast:
Arnold MO
 38.42°N 90.38°W (Elev. 495 ft)
4:41 pm CST Jan 10, 2026
6pm CST Jan 10, 2026-6pm CST Jan 17, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database