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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 3:43 pm EST Dec 27, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Tonight Sunday Monday Tuesday Wednesday New Year's Day Friday Saturday
Morning Fog on Tonight 80% chance of rain on Sunday 70% chance of rain & snow on Monday 50% chance of snow on Tuesday 40% chance of snow on Wednesday 50% chance of snow on New Year's Day Mostly Sunny on Friday 30% chance of  on Saturday
Low: 29°F High: 59°F High: 49°F High: 28°F High: 33°F High: 30°F High: 28°F High: 35°F
Low: 47°F Low: 20°F Low: 20°F Low: 23°F Low: 14°F Low: 16°F  
Morning Fog Rain Rain & Snow Snow Snow Snow Mostly Sunny Partly Sunny
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Current Conditions at
PITTSBURGH - (KPIT)
34°
Cloudy
as of 5:24 PM EST
Rel. Humidity: 86%
Dew Point: 30°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: IFR
Wind Data
3 MPH
070° East
Cloud Level(s): Solid Overcast at 900ft
Morning Fog on Tonight Tonight... Patchy fog between 9pm and 1am. Otherwise, mostly cloudy, with a low around 29. Calm wind.

80% chance of rain Sunday Sunday... Rain, mainly between noon and 2pm. High near 59. Calm wind becoming south 5 to 8 mph in the morning. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

100% chance of rain Sunday Night Sunday Night... Rain. Low around 47. South wind 9 to 17 mph, with gusts as high as 31 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

70% chance of rain & snow Monday Monday... Snow likely, possibly mixed with rain, becoming all snow after 4pm. Mostly cloudy, with a high near 49. Breezy, with a southwest wind 18 to 24 mph, with gusts as high as 44 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

90% chance of snow Monday Night Monday Night... Snow showers. Low around 20. Breezy, with a west wind 20 to 22 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

50% chance of snow Tuesday Tuesday... A chance of snow showers before 1pm. Mostly cloudy, with a high near 28. Breezy. Chance of precipitation is 50%.

30% chance of snow Tuesday Night Tuesday Night... A chance of snow showers after 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.

40% chance of snow Wednesday Wednesday... A chance of snow showers after 1pm. Mostly cloudy, with a high near 33. Chance of precipitation is 40%.

60% chance of snow Wednesday Night Wednesday Night... Snow showers likely, mainly after 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.

50% chance of snow New Year's Day New Year's Day... A chance of snow showers. Mostly cloudy, with a high near 30. Chance of precipitation is 50%.

Mostly Cloudy on Thursday Night Thursday Night... Mostly cloudy, with a low around 14.

Mostly Sunny on Friday Friday... Mostly sunny, with a high near 28.

Mostly Cloudy on Friday Night Friday Night... Mostly cloudy, with a low around 16.

30% chance of  Saturday Saturday... A chance of showers. Partly sunny, with a high near 35. Chance of precipitation is 30%.

Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:42 AM
Sunset: 4:59 PM
Civil Sunrise:07:11 AM
Civil Sunset: 5:30 PM
Nautical Sunrise: 06:37 AM
Nautical Sunset: 6:04 PM
Astro Sunrise: 06:03 AM
Astro Sunset: 6:37 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.