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Climate almanac

Middletown

Delaware, United States · 39.45°, -75.72°

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What is the weather like in Middletown in September?

In September, Middletown is typically 78°F (26°C) during the day and 65°F (19°C) at night. The month brings about 4.0 in (101 mm) of precipitation in total.

  • Average high78°F (26°C)
  • Average low65°F (19°C)
  • Precipitation4.0 in (101 mm)
  • Clear or mostly clear days12
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)