With a population of around 27,000, Eureka sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Eureka recorded an average annual temperature of 52°F — right at the 30-year normal of 53°F. The hottest day reached 76°F in September; the coldest was 28°F in February. Total precipitation was 58 inches (wetter than usual). The wettest month was December.
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