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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 11:23 am EST Nov 19, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
This Afternoon Tonight Thursday Friday Saturday Sunday Monday Tuesday
Partly Sunny on This Afternoon Mostly Cloudy on Tonight Mostly Cloudy on Thursday 60% chance of rain on Friday Partly Sunny on Saturday Mostly Sunny on Sunday Partly Sunny on Monday 50% chance of rain on Tuesday
High: 50°F Low: 31°F High: 52°F High: 55°F High: 51°F High: 54°F High: 56°F High: 57°F
Low: 40°F Low: 38°F Low: 28°F Low: 33°F Low: 37°F  
Partly Sunny Mostly Cloudy Mostly Cloudy Rain Partly Sunny Mostly Sunny Partly Sunny Rain
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Current Conditions at
BUTLER COUNTY - (KBTP)
43°
Mostly Cloudy
as of 11:26 AM EST
Rel. Humidity: 75%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: MVFR
Wind Data
3 MPH
Cloud Level(s): Broken at 1700ft
Current Conditions at
PITTSBURGH - (KPIT)
39°
Mostly Cloudy
as of 11:24 AM EST
Rel. Humidity: 86%
Dew Point: 36°F
Visibility: 10 Miles
Pressure: 30.20 in.
Flight Rule: MVFR
Wind Data
Calm
Cloud Level(s): Broken at 1000ft
Partly Sunny on This Afternoon This Afternoon... Partly sunny, with a high near 50. Calm wind.

Mostly Cloudy on Tonight Tonight... Mostly cloudy, with a low around 31. Calm wind.

Mostly Cloudy on Thursday Thursday... Mostly cloudy, with a high near 52. Calm wind.

30% chance of rain Thursday Night Thursday Night... A chance of rain after 1am. Cloudy, with a low around 40. Calm wind. Chance of precipitation is 30%.

60% chance of rain Friday Friday... Rain likely, mainly after 1pm. Cloudy, with a high near 55. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

60% chance of rain Friday Night Friday Night... Rain likely, mainly before 1am. Cloudy, with a low around 38. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Partly Sunny on Saturday Saturday... Partly sunny, with a high near 51.

Cloudy on Saturday Night Saturday Night... Partly cloudy, with a low around 28.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 54.

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 33.

Partly Sunny on Monday Monday... Partly sunny, with a high near 56.

Mostly Cloudy on Monday Night Monday Night... Mostly cloudy, with a low around 37.

50% chance of rain Tuesday Tuesday... A chance of rain. Mostly cloudy, with a high near 57. Chance of precipitation is 50%.

Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:11 AM
Sunset: 4:58 PM
Civil Sunrise:06:41 AM
Civil Sunset: 5:28 PM
Nautical Sunrise: 06:08 AM
Nautical Sunset: 6:01 PM
Astro Sunrise: 05:35 AM
Astro Sunset: 6:34 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.