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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 7:51 pm EST Jan 19, 2026 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 Mostly Sunny on Tuesday 70% chance of rain & snow on Wednesday 20% chance of snow on Thursday Mostly Cloudy on Friday 30% chance of snow on Saturday 40% chance of snow on Sunday Partly Sunny on Monday
Low: 4 °F High: 19°F High: 40°F High: 36°F High: 23°F High: 13°F High: 17°F High: 20°F
Low: 9 °F Low: 29°F Low: 13°F Low: 3°F Low: 3 °F Low: 4 °F  
Cloudy Mostly Sunny Rain & Snow Snow Mostly Cloudy Snow Snow Partly Sunny
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Current Conditions at
BUTLER COUNTY - (KBTP)
Feels like -9°F
Clear
as of 7:56 PM EST
Rel. Humidity: 60%
Dew Point: -2°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
17 MPH
Gust: 25 MPH
270° West
Cloud Level(s): Clear
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
12°
Feels like -3°F
Clear
as of 7:53 PM EST
Rel. Humidity: 56%
Dew Point: -0°F
Visibility: 10 Miles
Pressure: 30.14 in.
Flight Rule: VFR
Wind Data
14 MPH
Gust: 25 MPH
290° West
Cloud Level(s): Clear
Current Conditions at
PITTSBURGH - (KPIT)
10°
Feels like -7°F
Mostly Clear
as of 7:51 PM EST
Rel. Humidity: 55%
Dew Point: -2°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
18 MPH
280° West
Cloud Level(s): Few at 3500ft
Current Conditions at
LATROBE - (KLBE)
16°
Feels like 0°F
Mostly Cloudy
as of 7:47 PM EST
Rel. Humidity: 66%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
16 MPH
270° West
Cloud Level(s): Few at 3500ft, Scattered at 4200ft, Broken at 12000ft
Cloudy on Tonight Tonight... Partly cloudy, with a low around 4. Wind chill values as low as -10. West wind 8 to 13 mph, with gusts as high as 24 mph.

Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 19. Wind chill values as low as -9. West wind 9 to 14 mph.

Mostly Clear on Tuesday Night Tuesday Night... Mostly clear, with a low around 9. South wind 3 to 5 mph.

70% chance of rain & snow Wednesday Wednesday... A slight chance of snow before 1pm, then snow likely, possibly mixed with rain between 1pm and 4pm, then rain likely after 4pm. Mostly cloudy, with a high near 40. Southwest wind 6 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

70% chance of rain & snow Wednesday Night Wednesday Night... Rain and snow likely before 4am, then a chance of snow. Mostly cloudy, with a low around 29. Southwest wind 10 to 13 mph, with gusts as high as 24 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

20% chance of snow Thursday Thursday... A slight chance of snow before 1pm. Partly sunny, with a high near 36. Chance of precipitation is 20%.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 13.

Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 23.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 3.

30% chance of snow Saturday Saturday... A chance of snow after 1pm. Mostly cloudy and cold, with a high near 13. Chance of precipitation is 30%.

30% chance of snow Saturday Night Saturday Night... A chance of snow. Mostly cloudy, with a low around 3. Chance of precipitation is 30%.

40% chance of snow Sunday Sunday... A chance of snow. Partly sunny, with a high near 17. Chance of precipitation is 40%.

30% chance of snow Sunday Night Sunday Night... A chance of snow. Partly cloudy, with a low around 4. Chance of precipitation is 30%.

Partly Sunny on Monday Monday... Partly sunny, with a high near 20.

Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:39 AM
Sunset: 5:21 PM
Civil Sunrise:07:09 AM
Civil Sunset: 5:51 PM
Nautical Sunrise: 06:35 AM
Nautical Sunset: 6:24 PM
Astro Sunrise: 06:03 AM
Astro Sunset: 6:57 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.