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Climate almanac

Arroyo Grande

California, United States · 35.12°, -120.59°

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What is the weather like in Arroyo Grande in September?

In September, Arroyo Grande is typically 70°F (21°C) during the day and 59°F (15°C) at night. The month brings about 0.3 in (7 mm) of precipitation in total.

  • Average high70°F (21°C)
  • Average low59°F (15°C)
  • Precipitation0.3 in (7 mm)
  • Clear or mostly clear days23
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)