Mount Vernon, in Ohio, United States, is home to roughly 16,700 people in the Eastern Time Zone at 40.4°N latitude.
In 2025, Mount Vernon recorded an average annual temperature of 51°F — about 2.3°F below the 30-year normal of 53°F. The hottest day reached 91°F in June; the coldest was -11°F in January. Total precipitation was 40 inches (near normal). The wettest month was May.
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