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Climate almanac

Union Gap

Washington, United States · 46.56°, -120.48°

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What is the weather like in Union Gap in September?

In September, Union Gap is typically 81°F (27°C) during the day and 51°F (11°C) at night. The month brings about 0.3 in (9 mm) of precipitation in total.

  • Average high81°F (27°C)
  • Average low51°F (11°C)
  • Precipitation0.3 in (9 mm)
  • Clear or mostly clear days18
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)