San Marino, in California, United States, is home to roughly 13,500 people in the Pacific Time Zone at 34.1°N latitude.
In 2025, San Marino recorded an average annual temperature of 64°F — about 1.7°F below the 30-year normal of 66°F. The hottest day reached 101°F in August; the coldest was 37°F in March. Total precipitation was 28 inches (wetter than usual). The wettest month was November.
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