Weather World
City of New Castle, PANew Castle, PA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
New Castle, PA Weather Forecast
New Castle, PA Weather Forecast Date: 502 AM EDT Wed Sep 16 2026
The area/counties/county of: Lawrence, including the cities of: New Castle and Ellwood City.or toggle through each period.
Today... Partly cloudy with a slight chance of showers this morning, then partly sunny with a chance of showers and thunderstorms this afternoon. Unseasonably warm with highs in the mid 80s. South winds around 5 mph, becoming west this afternoon. Chance of rain 50%.
Tonight... Mostly cloudy with a chance of showers. A chance of thunderstorms, mainly in the evening. Warm with lows in the upper 60s. North winds around 5 mph, becoming south after midnight. Chance of rain 50%.
Thursday... Becoming partly sunny in the afternoon. A slight chance of thunderstorms. Showers likely, mainly in the morning. Humid with highs in the lower 80s. West winds 5 to 10 mph. Chance of rain 70%.
Thursday Night... Mostly cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Humid with lows in the lower 60s. Northwest winds around 5 mph. Chance of rain 50%.
Friday... Partly cloudy. Highs in the upper 70s. North winds 5 to 10 mph.
Friday Night... Mainly clear. Lows in the mid 50s.
Saturday... Partly sunny. A chance of showers in the afternoon. Highs in the upper 70s. Chance of rain 40%.
Saturday Night... A chance of thunderstorms. Showers. Lows in the lower 60s. Chance of rain 90%.
Sunday... Showers. Highs in the mid 70s. Chance of rain 90%.
Sunday Night... Considerable cloudiness with a chance of showers. Lows around 60. Chance of rain 50%.
Monday... Mostly cloudy with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the upper 70s. Chance of rain 50%.
Monday Night... A chance of thunderstorms in the evening. Mostly cloudy with a chance of showers. Lows around 60. Chance of rain 50%.
POP = Probability of Precipitation
New Castle Radar Loop
Use the map search tool if you want to place a location marker on the radar map...