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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 6:42 am EST Dec 24, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Christmas Day Friday Saturday Sunday Monday Tuesday
Partly Sunny on Today 30% chance of rain on Tonight 30% chance of rain on Christmas Day 90% chance of rain on Friday Mostly Cloudy on Saturday 80% chance of rain on Sunday 50% chance of snow on Monday Mostly Cloudy on Tuesday
High: 42°F Low: 32°F High: 46°F High: 39°F High: 47°F High: 55°F High: 31°F High: 26°F
Low: 27°F Low: 35°F Low: 36°F Low: 22°F Low: 15°F  
Partly Sunny Rain Rain Rain Mostly Cloudy Rain Snow Mostly Cloudy
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Current Conditions at
BUTLER COUNTY - (KBTP)
32°
Cloudy
as of 7:56 AM EST
Rel. Humidity: 86%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.32 in.
Flight Rule: VFR
Wind Data
Calm
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
34°
Clear
as of 8:09 AM EST
Rel. Humidity: 80%
Dew Point: 28°F
Visibility: 7 Miles
Pressure: 30.30 in.
Flight Rule: VFR
Wind Data
5 MPH
320° Northwest
Cloud Level(s): Clear
Current Conditions at
PITTSBURGH - (KPIT)
36°
Mostly Cloudy
as of 8:30 AM EST
Rel. Humidity: 74%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
7 MPH
340° North
Cloud Level(s): Scattered at 1900ft, Broken at 25000ft
Current Conditions at
LATROBE - (KLBE)
36°
Partly Cloudy
as of 7:53 AM EST
Rel. Humidity: 86%
Dew Point: 32°F
Visibility: 10 Miles
Pressure: 30.33 in.
Flight Rule: VFR
Wind Data
3 MPH
270° West
Cloud Level(s): Scattered at 2000ft
Partly Sunny on Today Today... Partly sunny, with a high near 42. Northwest wind around 5 mph becoming calm in the afternoon.
30% chance of rain Tonight Tonight... A chance of rain, mainly after 3am. Mostly cloudy, with a low around 32. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
30% chance of rain Christmas Day Christmas Day... A chance of rain, mainly before 7am. Mostly cloudy, with a high near 46. Calm wind becoming northwest 5 to 7 mph in the morning. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 27. Light and variable wind becoming east around 6 mph after midnight.
90% chance of rain Friday Friday... Freezing rain likely before 10am, then rain likely, possibly mixed with freezing rain between 10am and 1pm, then rain after 1pm. High near 39. Southeast wind 7 to 11 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
80% chance of rain Friday Night Friday Night... Rain, mainly before 1am. Low around 35. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 47.
40% chance of rain Saturday Night Saturday Night... A chance of rain after 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 40%.
80% chance of rain Sunday Sunday... Rain. High near 55. Chance of precipitation is 80%.
70% chance of rain & snow Sunday Night Sunday Night... Rain likely before 1am, then a chance of rain and snow. Mostly cloudy, with a low around 22. Chance of precipitation is 70%.
50% chance of snow Monday Monday... A chance of snow showers. Mostly cloudy, with a high near 31. Breezy. Chance of precipitation is 50%.
30% chance of snow Monday Night Monday Night... A chance of snow showers. Mostly cloudy, with a low around 15. Chance of precipitation is 30%.
Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 26.
Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:41 AM
Sunset: 4:57 PM
Civil Sunrise:07:10 AM
Civil Sunset: 5:28 PM
Nautical Sunrise: 06:35 AM
Nautical Sunset: 6:02 PM
Astro Sunrise: 06:02 AM
Astro Sunset: 6:36 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.