With a population of around 3,400, Day Valley sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Day Valley recorded an average annual temperature of 57°F — right at the 30-year normal of 57°F. The hottest day reached 98°F in August; the coldest was 33°F in January. Total precipitation was 29 inches (wetter than usual). The wettest month was February.
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