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City of New Castle, DENew Castle, DE 7-Day Night Weather Forecast
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New Castle, DE Weather Forecast
New Castle, DE Weather Forecast Date: 610 PM EDT Sun Sep 20 2026
The area/counties/county of: New Castle, including the city of Wilmington.or toggle through each period.
Tonight... Mostly cloudy. Showers likely with a slight chance of thunderstorms this evening, then a chance of showers after midnight. Lows in the lower 60s. Southwest winds around 5 mph, becoming north after midnight. Chance of rain 70%.
Monday... Partly sunny. Highs in the lower 70s. Northeast winds 5 to 10 mph.
Monday Night... Cloudy. A chance of showers in the evening, then showers likely after midnight. Lows in the upper 50s. Northeast winds 5 to 10 mph. Chance of rain 70%.
Tuesday... Showers. Highs in the mid 60s. Northeast winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 80%.
Tuesday Night... Mostly cloudy with a 50% chance of showers. Lows in the mid 50s. Northeast winds 10 to 15 mph with gusts up to 25 mph.
Wednesday... Mostly cloudy with a 50% chance of showers. Highs in the mid 60s.
Wednesday Night... Mostly cloudy. A chance of showers in the evening. Lows in the mid 50s. Chance of rain 30%.
Thursday... Mostly cloudy. Highs in the mid 60s.
Thursday Night... Mostly cloudy. Lows in the lower 50s.
Friday... Partly sunny. A chance of showers in the afternoon. Highs in the mid 60s. Chance of rain 30%.
Friday Night... Partly cloudy. A chance of showers in the evening. Lows in the lower 50s. Chance of rain 30%.
Saturday... Mostly sunny. Highs in the upper 60s.
Saturday Night... Partly cloudy in the evening, then becoming mostly cloudy. Lows in the mid 50s.
POP = Probability of Precipitation
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