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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 5:03 pm EST Jan 7, 2026 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Tonight Thursday Friday Saturday Sunday Monday Tuesday Wednesday
Morning Fog on Tonight Morning Fog on Thursday 90% chance of rain on Friday 90% chance of rain on Saturday 50% chance of snow on Sunday Partly Sunny on Monday Mostly Sunny on Tuesday 40% chance of rain on Wednesday
Low: 35°F High: 53°F High: 62°F High: 60°F High: 37°F High: 36°F High: 42°F High: 42°F
Low: 44°F Low: 49°F Low: 32°F Low: 24°F Low: 26°F Low: 31°F  
Morning Fog Morning Fog Rain Rain Snow Partly Sunny Mostly Sunny Rain
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Current Conditions at
BUTLER COUNTY - (KBTP)
Clear
as of 4:56 PM EST
Wind Data
Calm
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
45°
Cloudy
as of 4:53 PM EST
Rel. Humidity: 75%
Dew Point: 37°F
Visibility: 10 Miles
Pressure: 29.95 in.
Flight Rule: MVFR
Wind Data
7 MPH
280° West
Cloud Level(s): Solid Overcast at 2500ft
Current Conditions at
PITTSBURGH - (KPIT)
45°
Cloudy
as of 4:51 PM EST
Rel. Humidity: 81%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.97 in.
Flight Rule: MVFR
Wind Data
7 MPH
270° West
Cloud Level(s): Broken at 2000ft, Solid Overcast at 2600ft
Current Conditions at
LATROBE - (KLBE)
46°
Cloudy
as of 4:50 PM EST
Rel. Humidity: 75%
Dew Point: 39°F
Visibility: 10 Miles
Pressure: 29.98 in.
Flight Rule: MVFR
Wind Data
8 MPH
230° Southwest
Cloud Level(s): Solid Overcast at 2700ft
Morning Fog on Tonight Tonight... Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 35. West wind around 6 mph becoming calm in the evening.
Morning Fog on Thursday Thursday... Patchy fog before 8am. Otherwise, partly sunny, with a high near 53. Calm wind becoming southeast around 5 mph in the afternoon.
40% chance of rain Thursday Night Thursday Night... A chance of showers after 1am. Mostly cloudy, with a low around 44. Southeast wind 6 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
90% chance of rain Friday Friday... Showers. High near 62. South wind 9 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
70% chance of rain Friday Night Friday Night... Showers likely. Cloudy, with a low around 49. Southwest wind 5 to 7 mph becoming calm after midnight. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
90% chance of rain Saturday Saturday... Showers. High near 60. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
50% chance of rain & snow Saturday Night Saturday Night... A chance of rain showers before 1am, then a chance of rain and snow showers. Mostly cloudy, with a low around 32. Chance of precipitation is 50%.
50% chance of snow Sunday Sunday... A chance of snow showers. Mostly cloudy, with a high near 37. Chance of precipitation is 50%.
30% chance of snow Sunday Night Sunday Night... A chance of snow showers before 1am. Mostly cloudy, with a low around 24. Chance of precipitation is 30%.
Partly Sunny on Monday Monday... Partly sunny, with a high near 36.
Cloudy on Monday Night Monday Night... Partly cloudy, with a low around 26.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 42.
Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 31.
40% chance of rain Wednesday Wednesday... A chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 40%.
Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:43 AM
Sunset: 5:08 PM
Civil Sunrise:07:12 AM
Civil Sunset: 5:39 PM
Nautical Sunrise: 06:38 AM
Nautical Sunset: 6:13 PM
Astro Sunrise: 06:05 AM
Astro Sunset: 6:46 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.