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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 12:18 pm EST Dec 25, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Christmas Day Tonight Friday Saturday Sunday Monday Tuesday Wednesday
Partly Sunny on Christmas Day Mostly Cloudy on Tonight 100% chance of freezing rain on Friday Mostly Cloudy on Saturday 80% chance of rain on Sunday 80% chance of rain & snow on Monday Mostly Cloudy on Tuesday 30% chance of snow on Wednesday
High: 48°F Low: 28°F High: 43°F High: 42°F High: 58°F High: 52°F High: 29°F High: 33°F
  Low: 35°F Low: 31°F Low: 39°F Low: 20°F Low: 21°F  
Partly Sunny Mostly Cloudy Freezing Rain Mostly Cloudy Rain Rain & Snow Mostly Cloudy Snow
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Current Conditions at
BUTLER COUNTY - (KBTP)
45°
Feels like 39°F
Clear
as of 12:56 PM EST
Rel. Humidity: 70%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.06 in.
Flight Rule: VFR
Wind Data
10 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
43°
Feels like 36°F
Partly Cloudy
Haze
as of 1:16 PM EST
Rel. Humidity: 81%
Dew Point: 37°F
Visibility: 4 Miles
Pressure: 30.05 in.
Flight Rule: MVFR
Wind Data
10 MPH
Gust: 21 MPH
330° Northwest
Cloud Level(s): Few at 1000ft, Scattered at 1600ft
Current Conditions at
PITTSBURGH - (KPIT)
43°
Feels like 36°F
Mostly Cloudy
as of 1:06 PM EST
Rel. Humidity: 81%
Dew Point: 37°F
Visibility: 8 Miles
Pressure: 30.07 in.
Flight Rule: MVFR
Wind Data
13 MPH
310° Northwest
Cloud Level(s): Scattered at 1400ft, Broken at 2200ft, Broken at 25000ft
Current Conditions at
LATROBE - (KLBE)
43°
Feels like 36°F
Mostly Cloudy
Mist
as of 12:47 PM EST
Rel. Humidity: 100%
Dew Point: 43°F
Visibility: 4 Miles
Pressure: 30.06 in.
Flight Rule: IFR
Wind Data
13 MPH
310° Northwest
Cloud Level(s): Broken at 600ft
Partly Sunny on Christmas Day Christmas Day... Partly sunny, with a high near 48. North wind around 8 mph.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 28. Calm wind becoming east around 6 mph after midnight.
100% chance of freezing rain Friday Friday... A slight chance of freezing rain before 10am, then rain. High near 43. East wind 7 to 10 mph becoming southeast in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. Little or no ice accumulation expected.
70% chance of rain Friday Night Friday Night... Rain likely, mainly before 1am. Cloudy, with a low around 35. East wind around 6 mph becoming west in the evening. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 42. Light and variable wind.
Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 31.
80% chance of rain Sunday Sunday... Rain, mainly after 1pm. High near 58. Chance of precipitation is 80%.
100% chance of rain Sunday Night Sunday Night... Rain. Low around 39. Chance of precipitation is 100%.
80% chance of rain & snow Monday Monday... Rain before 1pm, then a chance of rain and snow. High near 52. Chance of precipitation is 80%.
60% chance of snow Monday Night Monday Night... Snow likely, mainly before 1am. Cloudy, with a low around 20. Chance of precipitation is 60%.
Mostly Cloudy on Tuesday Tuesday... Mostly cloudy, with a high near 29.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 21.
30% chance of snow Wednesday Wednesday... A chance of snow. Mostly cloudy, with a high near 33. Chance of precipitation is 30%.
Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:41 AM
Sunset: 4:58 PM
Civil Sunrise:07:10 AM
Civil Sunset: 5:28 PM
Nautical Sunrise: 06:36 AM
Nautical Sunset: 6:03 PM
Astro Sunrise: 06:03 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.