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Climate almanac

Oceanside

California, United States · 33.20°, -117.38°

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What is the weather like in Oceanside in December?

In December, Oceanside is typically 65°F (18°C) during the day and 54°F (12°C) at night. The month brings about 2.0 in (52 mm) of precipitation in total.

  • Average high65°F (18°C)
  • Average low54°F (12°C)
  • Precipitation2.0 in (52 mm)
  • Clear or mostly clear days12
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)