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Climate almanac

Forest Grove

Oregon, United States · 45.52°, -123.11°

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What is the weather like in Forest Grove in September?

In September, Forest Grove is typically 77°F (25°C) during the day and 54°F (12°C) at night. The month brings about 2.0 in (51 mm) of precipitation in total.

  • Average high77°F (25°C)
  • Average low54°F (12°C)
  • Precipitation2.0 in (51 mm)
  • Clear or mostly clear days13
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)