With a population of around 8,400, Birch Bay sits in Washington, United States. The city operates in the Pacific Time Zone.
In 2025, Birch Bay recorded an average annual temperature of 50°F — about 0.9°F below the 30-year normal of 51°F. The hottest day reached 83°F in August; the coldest was 13°F in February. Total precipitation was 55 inches (wetter than usual). The wettest month was December.
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