Weather WorldNewcastle, CA 7-Day Weather Forecast
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Newcastle Weather Forecast
Newcastle, CA Weather Forecast Date: 1032 PM PST Tue Nov 10 2026
Weather forecast for Newcastle, CA
Tonight Lo: 49°F Lo: 9°C |
Tonight... Clear. Haze late in the night. Lows 45 to 51. Light winds. |
| Veterans Day Hi: 74°FHi: 23°C Lo: 49°F Lo: 9°C |
Veterans Day... Haze in the morning. Sunny. Highs around 74. Light winds. |
Thu Hi: 75°FHi: 24°C Lo: 52°F Lo: 11°C |
Thursday... Mostly sunny. Highs 70 to 78. Light winds. |
Fri Hi: 65°FHi: 18°C Lo: 47°F Lo: 8°C |
Friday... Rain showers and a slight chance of thunderstorms. Highs around 65. |
Sat Hi: 62°FHi: 17°C Lo: 46°F Lo: 8°C |
Saturday... Mostly cloudy with a chance of rain. Highs around 62. |
| Sun Hi: 61°FHi: 16°C Lo: 47°F Lo: 8°C |
Sunday... Mostly cloudy with a chance of rain. Highs around 61. |
Mon Hi: 57°FHi: 14°C Lo: 40°F Lo: 4°C |
Monday... Rain likely. Lows around 47. Highs around 57. |
Newcastle Radar Loop
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