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Climate almanac

Harleysville

Pennsylvania, United States · 40.28°, -75.39°

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What is the weather like in Harleysville in September?

In September, Harleysville is typically 78°F (25°C) during the day and 61°F (16°C) at night. The month brings about 4.0 in (103 mm) of precipitation in total.

  • Average high78°F (25°C)
  • Average low61°F (16°C)
  • Precipitation4.0 in (103 mm)
  • Clear or mostly clear days10
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)