Middletown is a city of approximately 1,300 people in California, United States. Located in the Pacific Time Zone at 38.8°N latitude.
In 2025, Middletown recorded an average annual temperature of 61°F — about 2.6°F above the 30-year normal of 58°F. The hottest day reached 99°F in August; the coldest was 30°F in February. Total precipitation was 47 inches (wetter than usual). The wettest month was February.
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