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Climate almanac

Hillsborough

California, United States · 37.57°, -122.38°

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What is the weather like in Hillsborough in December?

In December, Hillsborough is typically 57°F (14°C) during the day and 50°F (10°C) at night. The month brings about 4.2 in (107 mm) of precipitation in total.

  • Average high57°F (14°C)
  • Average low50°F (10°C)
  • Precipitation4.2 in (107 mm)
  • Clear or mostly clear days8
  • Based on2016-2025 daily ERA5 reanalysis data (10-year normals)