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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 11:04 pm EST Dec 8, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Tonight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Cloudy on Tonight 20% chance of snow on Tuesday 100% chance of rain & snow on Wednesday 50% chance of snow on Thursday 60% chance of snow on Friday 40% chance of snow on Saturday Mostly Cloudy on Sunday Mostly Cloudy on Monday
Low: 12°F High: 37°F High: 42°F High: 31°F High: 32°F High: 27°F High: 25°F High: 31°F
Low: 31°F Low: 26°F Low: 20°F Low: 17°F Low: 14°F Low: 11°F  
Cloudy Snow Rain & Snow Snow Snow Snow Mostly Cloudy Mostly Cloudy
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Current Conditions at
BUTLER COUNTY - (KBTP)
12°
Clear
as of 10:56 PM EST
Rel. Humidity: 56%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.24 in.
Flight Rule: VFR
Wind Data
6 MPH
060° Northeast
Cloud Level(s): Clear
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
18°
Feels like 6°F
Clear
as of 10:53 PM EST
Rel. Humidity: 44%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.21 in.
Flight Rule: VFR
Wind Data
9 MPH
080° East
Cloud Level(s): Clear
Current Conditions at
PITTSBURGH - (KPIT)
18°
Mostly Clear
as of 10:51 PM EST
Rel. Humidity: 44%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.22 in.
Flight Rule: VFR
Wind Data
6 MPH
060° Northeast
Cloud Level(s): Few at 18000ft, Few at 25000ft
Current Conditions at
LATROBE - (KLBE)
16°
Clear
as of 10:55 PM EST
Rel. Humidity: 61%
Dew Point: 5°F
Visibility: 10 Miles
Pressure: 30.25 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Cloudy on Tonight Tonight... Partly cloudy, with a low around 12. Calm wind.
20% chance of snow Tuesday Tuesday... A slight chance of snow between 1pm and 2pm. Increasing clouds, with a high near 37. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 24 mph. Chance of precipitation is 20%.
60% chance of rain & snow Tuesday Night Tuesday Night... Rain likely after 1am, mixing with snow after 4am. Cloudy, with a low around 31. Southwest wind 9 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
100% chance of rain & snow Wednesday Wednesday... Rain, possibly mixed with snow, becoming all rain after 10am. High near 42. South wind 15 to 17 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New snow accumulation of less than a half inch possible.
90% chance of rain & snow Wednesday Night Wednesday Night... Rain and snow, becoming all snow after 10pm. Low around 26. West wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
50% chance of snow Thursday Thursday... A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 50%.
50% chance of snow Thursday Night Thursday Night... A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 50%.
60% chance of snow Friday Friday... Snow likely, mainly after 1pm. Mostly cloudy, with a high near 32. Chance of precipitation is 60%.
70% chance of snow Friday Night Friday Night... Snow likely. Mostly cloudy, with a low around 17. Chance of precipitation is 70%.
40% chance of snow Saturday Saturday... A chance of snow. Mostly cloudy, with a high near 27. Chance of precipitation is 40%.
40% chance of snow Saturday Night Saturday Night... A chance of snow. Mostly cloudy, with a low around 14. Chance of precipitation is 40%.
Mostly Cloudy on Sunday Sunday... Mostly cloudy, with a high near 25.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 11.
Mostly Cloudy on Monday Monday... Mostly cloudy, with a high near 31.
Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:30 AM
Sunset: 4:52 PM
Civil Sunrise:07:00 AM
Civil Sunset: 5:23 PM
Nautical Sunrise: 06:26 AM
Nautical Sunset: 5:57 PM
Astro Sunrise: 05:52 AM
Astro Sunset: 6:30 PM
Any use of the information on this page is at your own risk. This information should not be relied upon in life-threatening situations, potential financial loss situations or in lieu of any officially disseminated information. Visit the National Weather Service for official information.