Boston weather in December 2020

  • 4°C maximum daytime temperature in December in Boston4
    4°C max day temperature
  • 5 hours of sunshine per day
  • 12 days with some rainfall in December in Boston12
    12 days with some rainfall
  • -5°C minimum night-time temperature in December in Boston-5
    -5°C min night temperature
  • 9 hours of daylight per day in December in Boston9
    9 hours of daylight per day
  • No heat & humidity in December in Boston0
    No heat & humidity
  • 105 mm monthly rainfall in December in Boston105
    105 mm of monthly rainfall
  • UV (maximum) index 1 (Low) in December in Boston1
    1 (Low) UV index
  • 7°C sea temperature in December in Boston7
    7°C sea temperature
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The December weather guide for Boston, Massachusetts shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

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How cold is it in Boston in December?

Daytime temperatures usually reach 4°C in Boston in December, falling to -5°C at night.

How sunny is it in Boston in December?

There are normally 5 hours of bright sunshine each day in Boston in December - that's 49% of daylight hours.

Is the sea cold around Boston in December?

The average sea temperature around Boston in December is 7°C.

Does it rain in Boston in December?

There are usually 12 days with some rain in Boston in December and the average monthly rainfall is 105mm.

Boston sunrise & sunset times for December 2020

Browse the sunrise & sunset times for Boston in December 2020. Select a month to view Boston sunrise & sunset times for the next twelve months.


Date Sunrise times Sunset times
Tuesday, 1st December 2020 06:54 16:12
Wednesday, 16th December 2020 07:07 16:13
Thursday, 31st December 2020 07:13 16:22
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Metric (°C / mm)  |  Imperial (°F / inches)

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Where's warm in Massachusetts in December?

Below are average maximum temperatures at popular destinations in Massachusetts in December. Select a destination to see more weather parameters.

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