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

April 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
April is a cool spring month in Nantucket, Massachusetts, with average temperature varying between 38.5°F (3.6°C) and 51.3°F (10.7°C).

Temperature

In April, the average high-temperature marginally rises, from a frosty 44.2°F (6.8°C) in March, to a fresh 51.3°F (10.7°C). The average low-temperature, in April, is 38.5°F (3.6°C).

Rainfall

In Nantucket, in April, it is raining for 11 days, with typically 3.7" (95mm) of accumulated precipitation. Throughout the year, there are 120 rainfall days, and 44.4" (1128.3mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall.

Ocean temperature

In April, the average ocean temperature in Nantucket is 44.1°F (6.7°C). Swimming in 44.1°F (6.7°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The average length of the day is 13.4h.

Sunshine

In Nantucket, the average sunshine in April is 8h.

UV index

In Nantucket, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for ordinary individuals.
In April, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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 temperature in April in Nantucket?

In Nantucket, Massachusetts, in April, the average high-temperature is 51.3°F (10.7°C), and the average low-temperature is 38.5°F (3.6°C).

How many days does it rain in April in Nantucket?

In Nantucket, in April, during 11 rainfall days, 3.7" (95mm) of precipitation is typically accumulated.

What is the last month it snows in Nantucket?

April is the last month it regularly snows in Nantucket. Throughout April, Nantucket aggregates 0.8" (20.3mm) of snow.

What is the water temperature in April in Nantucket?

In Nantucket, in April, the average water temperature is 44.1°F (6.7°C). Swimming in 44.1°F (6.7°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

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

In Nantucket, Massachusetts, the average length of the day in April is 13.4h.

How long on average sun shines in April in Nantucket?

The average sunshine in April in Nantucket is 8h.

How high is the UV index in April in Nantucket?

In Nantucket, the average daily maximum UV index in April is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.
Average temperature in April - Nantucket, MA
  • Average high temperature in April: 51.3°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 April: 38.4°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 April - Nantucket, MA
  • Average rainfall in April: 3.7"

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 April - Nantucket, MA
  • Average rainfall days in April: 11 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 April - Nantucket, MA
  • Average snowfall in April: 0.8"

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 April - Nantucket, MA
  • Average sea temperature in April: 44°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 April / Average sunshine in April - Nantucket, MA
  • Average daylight in April: 13.4h

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 April: 8h

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 April - Nantucket, MA
  • Average UV index in April: 6

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).