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City of New Castle, PANew Castle, PA Weather Forecast
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| TONIGHT | SUNDAY | SUNDAY NIGHT | MONDAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY | THURSDAY NIGHT | FRIDAY |
 |  | |  | | | | | | | | |
| Clear | Clearing | Clear | Mostly Sunny | Clear | Sunny | Clear | Sunny | Clear | Mostly Sunny | Clear | Mostly Sunny |
| Lo: 49°FLo: 9°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 65°FHi: 18°C | Lo: 40°FLo: 4°C | Hi: 65°FHi: 18°C | Lo: 41°FLo: 5°C | Hi: 71°FHi: 22°C | Lo: 49°FLo: 9°C | Hi: 70°FHi: 21°C | Lo: 49°FLo: 9°C | Hi: 70°FHi: 21°C |
POP = Probability of Precipitation.
Weather Outlook Updated: 502 PM EDT Sat Oct 03 2026 
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Meteorlogic Glosserator
Instant definitions for any meteorological term.
Instant definitions for any meteorological term.
Issued: 115 PM EDT Sat Oct 3 2026
Key Messages
1) A dry forecast for the next 7 to 10 days. Frost is a possibility Tuesday and Wednesday mornings north of I-80 and mountains of southwest PA and northern WV.
Discussion
... KEY MESSAGE 1... A dry forecast with the only shot at measurable rainfall coming tonight into Sunday in the West Virginia mountains. There will be a lot more clouds in Pennsylvania Sunday than today. Eastern Ohio should be able to stay in the clear from the system passing through the mid Atlantic. A second moistur...