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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 1:31 pm EST Jan 13, 2026 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Wednesday Thursday Friday Saturday Sunday M.L.King Day
Mostly Cloudy on This Afternoon Mostly Cloudy on Tonight 90% chance of rain & snow on Wednesday 40% chance of snow on Thursday 50% chance of snow on Friday 70% chance of snow on Saturday 30% chance of snow on Sunday 40% chance of snow on M.L.King Day
High: 48°F Low: 41°F High: 46°F High: 24°F High: 34°F High: 36°F High: 23°F High: 26°F
Low: 16°F Low: 12°F Low: 27°F Low: 14°F Low: 12°F  
Mostly Cloudy Mostly Cloudy Rain & Snow Snow Snow Snow Snow Snow
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Current Conditions at
BUTLER COUNTY - (KBTP)
Clear
as of 3:56 PM EST
Wind Data
Calm
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
46°
Feels like 40°F
Cloudy
as of 3:53 PM EST
Rel. Humidity: 39%
Dew Point: 23°F
Visibility: 10 Miles
Pressure: 29.66 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 25 MPH
190° South
Cloud Level(s): Solid Overcast at 11000ft
Current Conditions at
PITTSBURGH - (KPIT)
48°
Feels like 43°F
Cloudy
as of 3:51 PM EST
Rel. Humidity: 34%
Dew Point: 21°F
Visibility: 10 Miles
Pressure: 29.67 in.
Flight Rule: VFR
Wind Data
12 MPH
Gust: 24 MPH
210° Southwest
Cloud Level(s): Few at 5000ft, Broken at 11000ft, Solid Overcast at 20000ft
Current Conditions at
LATROBE - (KLBE)
50°
Feels like 42°F
Mostly Cloudy
as of 3:47 PM EST
Rel. Humidity: 37%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 29.71 in.
Flight Rule: VFR
Wind Data
24 MPH
200° South
Cloud Level(s): Broken at 11000ft
Mostly Cloudy on This Afternoon This Afternoon... Mostly cloudy, with a high near 48. Southwest wind around 14 mph, with gusts as high as 25 mph.
Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 41. Southwest wind 9 to 13 mph, with gusts as high as 24 mph.
90% chance of rain & snow Wednesday Wednesday... Rain before 5pm, then snow, possibly mixed with rain. High near 46. Southwest wind around 9 mph. Chance of precipitation is 90%. Little or no snow accumulation expected.
80% chance of snow Wednesday Night Wednesday Night... Snow, mainly before 1am. Low around 16. West wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
40% chance of snow Thursday Thursday... A chance of snow, mainly before 1pm. Mostly cloudy, with a high near 24. West wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Cloudy on Thursday Night Thursday Night... Partly cloudy, with a low around 12.
50% chance of snow Friday Friday... A chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
60% chance of snow Friday Night Friday Night... Snow likely, mainly before 1am. Mostly cloudy, with a low around 27. Chance of precipitation is 60%.
70% chance of snow Saturday Saturday... Snow likely. Mostly cloudy, with a high near 36. Chance of precipitation is 70%.
30% chance of snow Saturday Night Saturday Night... A chance of snow before 1am. Mostly cloudy, with a low around 14. Chance of precipitation is 30%.
30% chance of snow Sunday Sunday... A chance of snow. Mostly cloudy, with a high near 23. Chance of precipitation is 30%.
Mostly Cloudy on Sunday Night Sunday Night... Mostly cloudy, with a low around 12.
40% chance of snow M.L.King Day M.L.King Day... A chance of snow. Mostly cloudy, with a high near 26. Chance of precipitation is 40%.
Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:41 AM
Sunset: 5:14 PM
Civil Sunrise:07:11 AM
Civil Sunset: 5:45 PM
Nautical Sunrise: 06:37 AM
Nautical Sunset: 6:18 PM
Astro Sunrise: 06:05 AM
Astro Sunset: 6:51 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.