Rossmoor, in California, United States, is home to roughly 10,200 people in the Pacific Time Zone at 33.8°N latitude.
In 2025, Rossmoor recorded an average annual temperature of 64°F — about 1.4°F below the 30-year normal of 65°F. The hottest day reached 96°F in May; the coldest was 42°F in March. Total precipitation was 19 inches (wetter than usual). The wettest month was November.
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