Nantucket
Massachusetts, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Nantucket, MA

Beautiful homes built on the water overlooking the boats on the water below, in Nantucket, Massachusetts, with stunning pink, sun rays
Beautiful homes built on the water overlooking the boats on the water below, in Nantucket, Massachusetts, with stunning pink, sun rays
January, like December, in Nantucket, Massachusetts, is a wintry winter month, with average temperature ranging between max 38.1°F (3.4°C) and min 25.2°F (-3.8°C).

Temperature

With an average high-temperature of 38.1°F (3.4°C) and an average low-temperature of 25.2°F (-3.8°C), January is the coldest month.

Rainfall

In January, in Nantucket, the rain falls for 12 days. Throughout January, 3.6" (91.7mm) of precipitation is accumulated. Throughout the year, in Nantucket, Massachusetts, there are 120 rainfall days, and 44.4" (1128.3mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Nantucket are January through April, November and December.

Ocean temperature

In January, the average ocean 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.

Daylight

In January, the average length of the day in Nantucket is 9.6h.

Sunshine

January, November and December, with an average of 5h of sunshine, are months with the least sunshine in Nantucket.

UV index

In Nantucket, Massachusetts, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to the UV radiation for the ordinary person.
In January, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the coldest month in Nantucket?

With an average high-temperature of 38.1°F (3.4°C) and an average low-temperature of 25.2°F (-3.8°C), January is the coldest month.

What is the temperature in January in Nantucket?

In Nantucket, in January, the average high-temperature is 38.1°F (3.4°C), and the average low-temperature is 25.2°F (-3.8°C).

How much does it rain in Nantucket in January?

In Nantucket, in January, it is raining for 12 days, with typically 3.6" (91.7mm) of accumulated precipitation.

How much does it snow in Nantucket in January?

During January, Nantucket regularly aggregates up to 7.4" (188mm) of snow.

What is the ocean temperature in January in Nantucket?

In Nantucket, the average seawater temperature in January is 40.5°F (4.7°C). For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

What is the average length of the day in January in Nantucket?

The average length of the day in January in Nantucket, Massachusetts, is 9.6h.

What is the month with the least sunshine in Nantucket?

January, November and December, with an average of 5h of sunshine, are months with the least sunshine in Nantucket.

How long on average sun shines in January in Nantucket?

In Nantucket, the average sunshine in January is 5h.

What is the UV index reading in January in Nantucket?

The average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in January - Nantucket, MA
  • Average high temperature in January: 38.1°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 January: 25.1°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 January - Nantucket, MA
  • Average rainfall in January: 3.6"

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 January - Nantucket, MA
  • Average rainfall days in January: 12 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 January - Nantucket, MA
  • Average snowfall in January: 7.4"

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 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).

Average daylight in January / Average sunshine in January - Nantucket, MA
  • Average daylight in January: 9.6h

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

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).