New Castle, DE Weather Forecast
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New Castle Weather Forecast
| TONIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY | FRIDAY NIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY |
| Partly Cloudy | Chance of T-Storm | Chance of Showers | Mostly Sunny | Partly Cloudy | Chance of Showers | Chance of T-Storm | Showers Likely | Chance of Showers | Mostly Sunny | Partly Cloudy | Mostly Sunny |
| Lo: 71°FLo: 22°C | Hi: 85°FHi: 29°C | Lo: 69°FLo: 21°C | Hi: 80°FHi: 27°C | Lo: 61°FLo: 16°C | Hi: 80°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 69°FLo: 21°C | Hi: 81°FHi: 27°C | Lo: 65°FLo: 18°C | Hi: 85°FHi: 29°C |
| POP: 30% | POP: 50% | POP: 30% | POP: 70% | POP: 70% | POP: 40% |
POP = Probability of Precipitation.
Weather Outlook Updated: 400 PM EDT Wed Sep 09 2026 

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Issued: 710 PM EDT Wed Sep 9 2026
Key Messages
1. A cold front will cross through the area Thursday into Thursday night bringing the potential for a round of showers and storms.
2. Another disturbance will approach the area on Saturday night into Sunday and produce a round of showers and thunderstorms.
Discussion
... KEY MESSAGE 1...A cold front will cross through the area Thursday into Thursday night bringing the potential for a round of showers and storms.
High pressure that has been over the region will shift offshore tonight. In ...
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