With a population of around 15,500, Fillmore sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Fillmore recorded an average annual temperature of 64°F — about 1.6°F above the 30-year normal of 62°F. The hottest day reached 99°F in August; the coldest was 37°F in March. Total precipitation was 27 inches (wetter than usual). The wettest month was December.
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