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Climate almanac

Sunnyside

Washington, United States · 46.32°, -120.01°

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What is the weather like in Sunnyside in September?

In September, Sunnyside is typically 83°F (29°C) during the day and 54°F (12°C) at night. The month brings about 0.3 in (8 mm) of precipitation in total.

  • Average high83°F (29°C)
  • Average low54°F (12°C)
  • Precipitation0.3 in (8 mm)
  • Clear or mostly clear days18
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)