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Arnold, Pennsylvania Weather Forecast
Arnold, Pennsylvania Weather
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Weather Forecast for Arnold, Pennsylvania : Westmoreland County
Issued: 11:43 am EST Nov 18, 2025 Latitude: 40.5800669 Longitude: -79.7667152 View on Google Maps

MouseOver for Detail Forecast
Today Tonight Wednesday Thursday Friday Saturday Sunday Monday
60% chance of rain & snow on Today 80% chance of rain on Tonight Partly Sunny on Wednesday Morning Fog on Thursday 40% chance of rain on Friday 40% chance of rain on Saturday Mostly Sunny on Sunday Mostly Sunny on Monday
High: 42°F Low: 34°F High: 51°F High: 53°F High: 57°F High: 51°F High: 54°F High: 56°F
Low: 34°F Low: 44°F Low: 35°F Low: 30°F Low: 34°F  
Rain & Snow Rain Partly Sunny Morning Fog Rain Rain Mostly Sunny Mostly Sunny
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Current Conditions at
ALLEGHENY COUNTY ARPT - (KAGC)
36°
Cloudy
as of 10:53 AM EST
Rel. Humidity: 64%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.15 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Scattered at 6500ft, Solid Overcast at 9000ft
Current Conditions at
PITTSBURGH - (KPIT)
36°
Cloudy
as of 10:51 AM EST
Rel. Humidity: 64%
Dew Point: 25°F
Visibility: 10 Miles
Pressure: 30.16 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Few at 4500ft, Broken at 6500ft, Solid Overcast at 8000ft
Current Conditions at
LATROBE - (KLBE)
37°
Mostly Clear
as of 10:47 AM EST
Rel. Humidity: 69%
Dew Point: 28°F
Visibility: 10 Miles
Pressure: 30.18 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Few at 4800ft, Few at 7500ft, Few at 9500ft
60% chance of rain & snow Today Today... A chance of snow before noon, then rain likely. Cloudy, with a high near 42. Light and variable wind. Chance of precipitation is 60%. Total daytime snow accumulation of less than a half inch possible.

80% chance of rain Tonight Tonight... Rain, mainly before 2am. Patchy fog between 9pm and 3am. Low around 34. Calm wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

Partly Sunny on Wednesday Wednesday... Partly sunny, with a high near 51. Calm wind.

Patchy Fog on Wednesday Night Wednesday Night... Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 34. Calm wind.

Morning Fog on Thursday Thursday... Areas of fog before 10am. Otherwise, cloudy, with a high near 53. Calm wind.

60% chance of rain Thursday Night Thursday Night... Rain likely, mainly after 1am. Patchy fog between 9pm and midnight. Otherwise, cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

40% chance of rain Friday Friday... A chance of rain. Mostly cloudy, with a high near 57. Chance of precipitation is 40%.

40% chance of rain Friday Night Friday Night... A chance of rain. Mostly cloudy, with a low around 35. Chance of precipitation is 40%.

40% chance of rain Saturday Saturday... A chance of rain. Partly sunny, with a high near 51. Chance of precipitation is 40%.

Morning Fog on Saturday Night Saturday Night... Patchy fog between 9pm and 3am. Otherwise, partly cloudy, with a low around 30.

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

Cloudy on Sunday Night Sunday Night... Partly cloudy, with a low around 34.

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

Current Radar Image


Sun Almanac for Arnold, Pennsylvania
Sunrise: 07:10 AM
Sunset: 4:59 PM
Civil Sunrise:06:40 AM
Civil Sunset: 5:29 PM
Nautical Sunrise: 06:07 AM
Nautical Sunset: 6:02 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.