With a population of around 79,600, Sylmar sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Sylmar recorded an average annual temperature of 64°F — about 2.5°F below the 30-year normal of 67°F. The hottest day reached 102°F in August; the coldest was 35°F in January. Total precipitation was 27 inches (wetter than usual). The wettest month was December.
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