December weather forecast and climate
Nantucket, MA

What is the temperature in December in Nantucket?

The average high-temperature, in December, in Nantucket, is 43.7°F (6.5°C), while the average low-temperature is 30.9°F (-0.6°C).

How many days does it rain in December in Nantucket?

In Nantucket, during December, the rain falls for 13 days and regularly aggregates up to 3.8" (96.5mm) of precipitation.

How much does it snow in Nantucket in December?

In Nantucket, in December, typically 5.8" (147.3mm) of snow is accumulated.
Average temperature in December - Nantucket, MA
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (75.1°F).
The month with the lowest average high temperature is January (38.1°F).

  • Average low temperature in December: 30.9°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (25.1°F).

Average rainfall in December - Nantucket, MA
  • Average rainfall in December: 3.8"

The wettest month (with the highest rainfall) is November (4.4").
The driest month (with the lowest rainfall) is February (2.7").

Average rainfall days in December - Nantucket, MA
  • Average rainfall days in December: 13 days

The month with the highest number of rainy days is December (13 days).
The month with the lowest number of rainy days is July (7 days).

Average snowfall in December - Nantucket, MA
  • Average snowfall in December: 5.8"

The month with the highest snowfall is February (8.5").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average sea temperature in December - Nantucket, MA
  • Average sea temperature in December: 46°F

The best month for swimming (with the highest average sea temperature) is August (67.6°F).
The coldest month (with the lowest average sea temperature) is February (37.9°F).

Average daylight in December / Average sunshine in December - Nantucket, MA
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

  • Average sunshine in December: 5h

The month with most sunshine is June (Average sunshine: 9h).
Months with least sunshine are January, November and December (Average sunshine: 5).

Average UV index in December - Nantucket, MA
  • Average UV index in December: 1

Months with the highest UV index are June, July and August (UV index 8).
The month with the lowest UV index is December (UV index 1).

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