Harleysville is a city of approximately 9,300 people in Pennsylvania, United States. Located in the Eastern Time Zone at 40.3°N latitude.
In 2025, Harleysville recorded an average annual temperature of 54°F — right at the 30-year normal of 53°F. The hottest day reached 98°F in June; the coldest was 0°F in January. Total precipitation was 38 inches (drier than usual). The wettest month was May.
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