With a population of around 22,800, Millbrae sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Millbrae recorded an average annual temperature of 57°F — about 2.0°F below the 30-year normal of 59°F. The hottest day reached 92°F in September; the coldest was 39°F in January. Total precipitation was 21 inches (near normal). The wettest month was February.
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