With a population of around 15,800, UC Irvine sits in California, United States. The city operates in the Pacific Time Zone.
In 2025, UC Irvine recorded an average annual temperature of 63°F — about 2.0°F below the 30-year normal of 65°F. The hottest day reached 93°F in May; the coldest was 38°F in January. Total precipitation was 20 inches (wetter than usual). The wettest month was November.
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