Sunnyside, in California, United States, is home to roughly 4,200 people in the Pacific Time Zone at 36.7°N latitude.
In 2025, Sunnyside recorded an average annual temperature of 65°F — right at the 30-year normal of 65°F. The hottest day reached 108°F in August; the coldest was 31°F in January. Total precipitation was 14 inches (wetter than usual). The wettest month was November.
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