With a population of around 21,400, Tustin Legacy sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, Tustin Legacy recorded an average annual temperature of 64°F — about 1.3°F below the 30-year normal of 65°F. The hottest day reached 97°F in May; the coldest was 39°F in January. Total precipitation was 18 inches (wetter than usual). The wettest month was November.
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