January weather forecast
Nantucket, MA

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Beautiful homes built on the water overlooking the boats on the water below, in Nantucket, Massachusetts
Beautiful homes built on the water overlooking the boats on the water below, in Nantucket, Massachusetts

Weather in January

Nantucket, Massachusetts, kicks off the year with chilly temperatures. January's weather is emblematic of the New England winter, with the average low of 32.9°F (0.5°C). It's the time of the year when Nantucket experiences a larger amount of snowfall with 1.06" (27mm) in comparison to the rest of the year, making it a real winter wonderland. January also sees shorter daylight hours, which contribute to the overall cooler temperatures and hibernation-like lifestyle. The winds are quite high this month, ensuring a brisk experience for visitors and locals alike.

Temperature

With January's arrival, Nantucket's weather records an average high-temperature of a wintry 40.3°F (4.6°C), marking little difference from December's 45.5°F (7.5°C). In Nantucket, January nights maintain a consistent temperature, with an average low of 32.9°F (0.5°C).

Humidity

The months with the lowest humidity are January, November and December, with an average relative humidity of 75%.

Rainfall

In January, the rain falls for 11.1 days. Throughout January, 2.24" (57mm) of precipitation is accumulated. Throughout the year, in Nantucket, there are 153 rainfall days, and 26.61" (676mm) of precipitation is accumulated.

Snowfall

January through March, November and December are months with snowfall in Nantucket, Massachusetts. January is the month with the most snowfall. Snow falls for 5.8 days and accumulates 1.06" (27mm) of snow.

Ocean temperature

In Nantucket, in January, the average water temperature is 40.5°F (4.7°C).
Note: In relation to swimming, the extreme cold, danger, and potential fatality of this situation are apparent. Without suitable insulated waterproof clothing, the onset of hypothermia is quick.

Daylight

In January, the average length of the day is 9h and 36min.
On the first day of January, sunrise is at 7:06 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 4:54 pm EST.

Sunshine

In January, the average sunshine is 4.6h.

UV index

The months with the lowest UV index are January through March and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: In January, the maximum UV index of 2 transforms into these recommendations:
Although the majority can endure up to an hour in the sun without burns, children always require sun protection. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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Frequently asked questions

Is it cold in Nantucket during January?

During January, Nantucket experiences an average high-temperature of 40.3°F (4.6°C) and a low-temperature of 32.9°F (0.5°C).

What are the least humid months in Nantucket?

The months with the lowest humidity in Nantucket are January, November and December, with an average relative humidity of 75%.

What is the average humidity in January in Nantucket?

In January, the average relative humidity is 75%.

How many days does it rain in January in Nantucket?

In Nantucket, in January, during 11.1 rainfall days, 2.24" (57mm) of precipitation is typically accumulated.

When does it snow the most in Nantucket?

The month with the most snowfall is January, when snow falls for 5.8 days and typically aggregates up to 1.06" (27mm) of snow.

How many days does it snow in January in Nantucket?

In Nantucket, in January, snow falls for 5.8 days, with typically accumulated 1.06" (27mm) of snow.

How cold is the water in January in Nantucket?

In Nantucket, Massachusetts, in January, the average water temperature is 40.5°F (4.7°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Nantucket have in January?

In Nantucket, Massachusetts, the average day length in January is 9h and 36min.

When are sunrise and sunset in January in Nantucket?

On the first day of January in Nantucket, Massachusetts, sunrise is at 7:06 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 6:52 am and sunset at 4:54 pm EST.

How many hours of sunshine does Nantucket have in January?

The average sunshine duration in January in Nantucket, Massachusetts, is 4.6h.

When is the lowest UV index in Nantucket?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Nantucket.

How high is the UV index in January in Nantucket?

The average daily maximum UV index in January in Nantucket is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Nantucket, MA

Average temperature in January - Nantucket, MA
  • Average high temperature in January: 40.3°F

The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is February (39.7°F).

  • Average low temperature in January: 32.9°F

The month with the highest average low temperature is August (68.7°F).
The coldest month (with the lowest average low temperature) is February (32.5°F).

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Average pressure in January
Nantucket, MA

Average pressure in January - Nantucket, MA
  • Average pressure in January: 30"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in January
Nantucket, MA

Average wind speed in January - Nantucket, MA
  • Average wind speed in January: 18.5mph

The windiest month (with the highest average wind speed) is January (18.5mph).
The calmest month (with the lowest average wind speed) is August (11.8mph).

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Average humidity in January
Nantucket, MA

Average humidity in January - Nantucket, MA
  • Average humidity in January: 75%

The month with the highest relative humidity is July (86%).
The months with the lowest relative humidity are January, November and December (75%).

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Average rainfall in January
Nantucket, MA

Average rainfall in January - Nantucket, MA
  • Average rainfall in January: 2.24"

The wettest month (with the highest rainfall) is October (3.27").
The driest month (with the least rainfall) is November (1.77").

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Average rainfall days in January
Nantucket, MA

Average rainfall days in January - Nantucket, MA
  • Average rainfall days in January: 11.1 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is February (9.2 days).

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Average snowfall in January
Nantucket, MA

Average snowfall in January - Nantucket, MA
  • Average snowfall in January: 1.06"

The month with the highest snowfall is January (1.06").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in January
Nantucket, MA

Average snowfall days in January - Nantucket, MA
  • Average snowfall days in January: 5.8 days

The month with the highest number of snowfall days is January (5.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average sea temperature in January
Nantucket, MA

Average sea temperature in January - Nantucket, MA
  • Average sea temperature in January: 40.5°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).

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Average daylight in January /
Average sunshine in January
Nantucket, MA

Average daylight in January / Average sunshine in January - Nantucket, MA
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 4h and 4min

The months with the most sunshine are July and August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).

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Average sunshine days in January
Nantucket, MA

Average sunshine days in January - Nantucket, MA
  • Average sunshine days in January: 11.3 days

The month with the most sunshine days is August (16.5 days).
The month with the least sunshine days is January (11.3 days).

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Average UV index in January
Nantucket, MA

Average UV index in January - Nantucket, MA
  • Average UV index in January: 2

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March and December (UV index 2).

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Average cloud cover in January
Nantucket, MA

Average cloud cover in January - Nantucket, MA
  • Average cloud cover in January: 52

The month with the most cloud cover is December (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 27).

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Average visibility in January
Nantucket, MA

Average visibility in January - Nantucket, MA
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Nantucket, Massachusetts, USA

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