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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 8:49 pm EST Dec 15, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Tonight Tuesday Wednesday Thursday Friday Saturday Sunday Monday
Mostly Clear on Tonight Mostly Sunny on Tuesday Mostly Cloudy on Wednesday 50% chance of rain on Thursday Mostly Cloudy on Friday Mostly Cloudy on Saturday 30% chance of rain on Sunday 30% chance of rain & snow on Monday
Low: 12°F High: 34°F High: 42°F High: 51°F High: 34°F High: 45°F High: 42°F High: 42°F
Low: 26°F Low: 26°F Low: 25°F Low: 20°F Low: 31°F Low: 26°F  
Mostly Clear Mostly Sunny Mostly Cloudy Rain Mostly Cloudy Mostly Cloudy Rain Rain & Snow
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Current Conditions at
BUTLER COUNTY - (KBTP)
12°
Mostly Cloudy
as of 10:56 PM EST
Rel. Humidity: 78%
Dew Point: 7°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
3 MPH
220° Southwest
Cloud Level(s): Broken at 5000ft
Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
19°
Cloudy
as of 10:53 PM EST
Rel. Humidity: 62%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.11 in.
Flight Rule: VFR
Wind Data
6 MPH
230° Southwest
Cloud Level(s): Solid Overcast at 6000ft
Current Conditions at
PITTSBURGH - (KPIT)
18°
Mostly Cloudy
as of 10:51 PM EST
Rel. Humidity: 67%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.12 in.
Flight Rule: VFR
Wind Data
6 MPH
240° Southwest
Cloud Level(s): Broken at 5500ft
Current Conditions at
LATROBE - (KLBE)
14°
Mostly Cloudy
as of 11:15 PM EST
Rel. Humidity: 78%
Dew Point: 9°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 6000ft
Mostly Clear on Tonight Tonight... Mostly cloudy early, then becoming mostly clear, with a low around 12. Southwest wind around 5 mph becoming calm after midnight.
Mostly Sunny on Tuesday Tuesday... Mostly sunny, with a high near 34. Calm wind becoming southwest 5 to 9 mph in the morning.
Cloudy on Tuesday Night Tuesday Night... Partly cloudy, with a low around 26. South wind 7 to 10 mph, with gusts as high as 22 mph.
Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 42. Southwest wind 8 to 13 mph, with gusts as high as 23 mph.
Mostly Cloudy on Wednesday Night Wednesday Night... Mostly cloudy, with a low around 26. Light and variable wind.
50% chance of rain Thursday Thursday... A chance of rain after 1pm. Partly sunny, with a high near 51. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
100% chance of rain & snow Thursday Night Thursday Night... Rain before 1am, then rain and snow likely. Low around 25. Chance of precipitation is 100%.
Mostly Cloudy on Friday Friday... Mostly cloudy, with a high near 34.
Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 20.
Mostly Cloudy on Saturday Saturday... Mostly cloudy, with a high near 45.
40% chance of rain Saturday Night Saturday Night... A chance of rain. Mostly cloudy, with a low around 31. Chance of precipitation is 40%.
30% chance of rain Sunday Sunday... A chance of rain. Mostly cloudy, with a high near 42. Chance of precipitation is 30%.
30% chance of freezing rain Sunday Night Sunday Night... A chance of rain or freezing rain. Mostly cloudy, with a low around 26. Chance of precipitation is 30%.
30% chance of rain & snow Monday Monday... A chance of rain and snow. Mostly cloudy, with a high near 42. Chance of precipitation is 30%.
Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:36 AM
Sunset: 4:53 PM
Civil Sunrise:07:05 AM
Civil Sunset: 5:24 PM
Nautical Sunrise: 06:31 AM
Nautical Sunset: 5:58 PM
Astro Sunrise: 05:57 AM
Astro Sunset: 6:31 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.