Keystone, in Florida, United States, is home to roughly 24,000 people in the Eastern Time Zone at 28.2°N latitude.
In 2025, Keystone recorded an average annual temperature of 71°F — about 3.1°F below the 30-year normal of 75°F. The hottest day reached 96°F in May; the coldest was 35°F in January. Total precipitation was 44 inches (drier than usual). The wettest month was August.
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