Granite Bay is a city of approximately 20,400 people in California, United States. Located in the Pacific Time Zone at 38.8°N latitude.
In 2025, Granite Bay recorded an average annual temperature of 62°F — about 1.2°F below the 30-year normal of 63°F. The hottest day reached 104°F in August; the coldest was 31°F in January. Total precipitation was 35 inches (wetter than usual). The wettest month was February.
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