Aliso Viejo is a city of approximately 50,200 people in California, United States. Located in the Pacific Time Zone at 33.6°N latitude.
In 2025, Aliso Viejo recorded an average annual temperature of 63°F — about 2.2°F below the 30-year normal of 65°F. The hottest day reached 98°F in May; the coldest was 38°F in January. Total precipitation was 19 inches (wetter than usual). The wettest month was November.
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