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Weather in December in Boston, Massachusetts

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< December >
 
Normal Max/ High Temperature 5°C (40°F)
 
Average Temperature 1°C (34°F)
 
Min/ Low Temperature -3°C (27°F)
Average Sea or Water Temp 4°C(39°F)
 
Normal Precipitation 102mm (4in)
Number of Wet Days (probability of rain on a day) 10 (32%)
Average Sunlight per day 05:19
Average Daylight per day 09:07
Sunny (Cloudy) Daylight Hours 59% (41%)
Sun altitude at solar noon on the 21st day.
24.2°


  • The average sea tempeature is 4 °C (39.2 °F).
  • The average temperature in Boston, Massachusetts in December is very cool at 0.9 °C (33.62 °F).
  • Afternoons can be cool with average high temperatures reaching 4.7 °C (40.5 °F).
  • Overnight temperatures are generally slightly cold with an average low of -2.9 °C (26.8 °F).
  • In December the variation/ range of daily average temperatures is 7.6 °C (13.7 °F).
  • The weather in December is not exactly parched with sleet or snow at times. Circa 101.9mm (4in) of liquid is discharged during on average 10 days.
  • The heavens above Boston, Massachusetts are slightly fair with an average of an unexceptional 5:19 of intense sunshine daily.
  • The shortest day is 9:04 long and the longest day is 9:17 long with an average length of 9:07.
  • There are approximately 3:37 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
  • It is sunny approximately 59.5% of daylight hours and cloudy 40.5% of daylight hours.

Check the distance to and compare the Boston, Massachusetts December averages with somewhere beginning with:

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Weather Trend Graph for December in Boston, Massachusetts, Usa

Graph of weather in Boston, Massachusetts in December

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