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Arnold, PA 7-Day Night Weather Forecast
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Arnold, PA Weather Forecast
Arnold, PA Weather Forecast Date: 202 PM EDT Sun Sep 13 2026
The area/counties/county of: Westmoreland, including the cities of: Murrysville, Greensburg, New Kensington, Lower Burrell, Latrobe, and Monessen.or toggle through each period.
This Afternoon... Partly cloudy. Near steady temperature around 80. West winds 5 to 10 mph.
Tonight... Mostly cloudy. Showers likely with a chance of thunderstorms in the evening, then a slight chance of showers after midnight. Humid with lows in the upper 50s. West winds 5 to 10 mph, becoming northwest after midnight. Chance of rain 70%.
Monday... Mostly sunny. Less humid with highs in the lower 70s. North winds 5 to 10 mph.
Monday Night... Mainly clear. Lows around 50. East winds around 5 mph.
Tuesday... Mostly sunny. Highs in the lower 80s. Southeast winds 5 to 10 mph, becoming south in the afternoon.
Tuesday Night... Mainly clear. Lows in the lower 60s.
Wednesday... Partly cloudy. Unseasonably warm with highs in the mid 80s.
Wednesday Night... Partly cloudy in the evening, then becoming mostly cloudy. Warm with lows in the mid 60s.
Thursday... Partly sunny. A chance of showers and thunderstorms in the afternoon. Unseasonably warm with highs in the mid 80s. Chance of rain 50%.
Thursday Night... A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Warm with lows in the mid 60s. Chance of rain 50%.
Friday... Mostly cloudy in the morning, then becoming partly sunny. A chance of showers. A chance of thunderstorms in the afternoon. Highs in the lower 80s. Chance of rain 40%.
Friday Night... Mostly cloudy. A chance of showers and thunderstorms in the evening. Lows in the lower 60s. Chance of rain 40%.
POP = Probability of Precipitation
Arnold Radar Loop
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