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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 5:33 pm EST Dec 19, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Tonight Saturday Sunday Monday Tuesday Wednesday Christmas Day Friday
Clearing on Tonight Increasing Clouds on Saturday Mostly Sunny on Sunday Partly Sunny on Monday 60% chance of rain on Tuesday Mostly Cloudy on Wednesday 60% chance of rain on Christmas Day 30% chance of rain on Friday
Low: 20°F High: 45°F High: 35°F High: 37°F High: 46°F High: 44°F High: 57°F High: 54°F
Low: 28°F Low: 15°F Low: 28°F Low: 30°F Low: 34°F Low: 46°F  
Clearing Increasing Clouds Mostly Sunny Partly Sunny Rain Mostly Cloudy Rain Rain
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Current Conditions at
BUTLER COUNTY - (KBTP)
18°
Feels like 1°F
Cloudy
Light Snow
as of 5:14 PM EST
Rel. Humidity: 78%
Dew Point: 12°F
Visibility: 5 Miles
Pressure: 29.88 in.
Flight Rule: MVFR
Wind Data
18 MPH
Gust: 31 MPH
260° West
Cloud Level(s): Few at 1500ft, Broken at 2500ft, Solid Overcast at 3000ft
Clearing on Tonight Tonight... Cloudy during the early evening, then gradual clearing, with a low around 20. West wind 13 to 18 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 30 mph.

Increasing Clouds on Saturday Saturday... Increasing clouds, with a high near 45. South wind 6 to 9 mph.

Mostly Cloudy on Saturday Night Saturday Night... Mostly cloudy, with a low around 28. Southwest wind 8 to 10 mph, with gusts as high as 21 mph.

Mostly Sunny on Sunday Sunday... Mostly sunny, with a high near 35. West wind 10 to 15 mph.

Mostly Clear on Sunday Night Sunday Night... Mostly clear, with a low around 15. Northwest wind 5 to 7 mph becoming calm in the evening.

Partly Sunny on Monday Monday... Partly sunny, with a high near 37.

60% chance of rain & snow Monday Night Monday Night... A chance of rain and snow before 1am, then rain likely. Cloudy, with a low around 28. Chance of precipitation is 60%.

60% chance of rain Tuesday Tuesday... Rain likely, mainly before 1pm. Cloudy, with a high near 46. Chance of precipitation is 60%.

Cloudy on Tuesday Night Tuesday Night... Cloudy, with a low around 30.

Mostly Cloudy on Wednesday Wednesday... Mostly cloudy, with a high near 44.

60% chance of rain Wednesday Night Wednesday Night... Rain likely. Cloudy, with a low around 34. Chance of precipitation is 60%.

60% chance of rain Christmas Day Christmas Day... Rain likely. Cloudy, with a high near 57. Chance of precipitation is 60%.

60% chance of rain Thursday Night Thursday Night... Rain likely. Cloudy, with a low around 46. Chance of precipitation is 60%.

30% chance of rain Friday Friday... A chance of rain. Partly sunny, with a high near 54. Chance of precipitation is 30%.

Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:38 AM
Sunset: 4:54 PM
Civil Sunrise:07:07 AM
Civil Sunset: 5:25 PM
Nautical Sunrise: 06:33 AM
Nautical Sunset: 6:00 PM
Astro Sunrise: 06:00 AM
Astro Sunset: 6:33 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.