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

May 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
May, the last month of the spring, in Nantucket, is a mild month, with average temperature ranging between max 59.7°F (15.4°C) and min 46°F (7.8°C).

Temperature

In Nantucket, the average high-temperature in May slightly increases, from a fresh 51.3°F (10.7°C) in April, to a mild 59.7°F (15.4°C). In May, in Nantucket, the average low-temperature is 46°F (7.8°C).

Rainfall

In May, in Nantucket, the rain falls for 10 days. Throughout May, 3.4" (86.9mm) of precipitation is accumulated. In Nantucket, during the entire year, the rain falls for 120 days and collects up to 44.4" (1128.3mm) of precipitation.

Snowfall

In May, in Nantucket, it doesn't snow. April is the latest month when it typically snows. In Nantucket, Massachusetts, during the entire year, snow aggregates up to 29.3" (744.2mm).

Ocean temperature

In May, the average ocean temperature is 50°F (10°C). Swimming in 50°F (10°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

In Nantucket, the average length of the day is 14.5h.

Sunshine

In May, the average sunshine is 8h.

UV index

In Nantucket, Massachusetts, the average daily maximum UV index in May is 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for the ordinary person.
The average daily UV index of 7 transform into the following instructions:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.

What is the temperature in May in Nantucket?

In May, in Nantucket, Massachusetts, the average high-temperature is 59.7°F (15.4°C), and the average low-temperature is 46°F (7.8°C).

How many days does it rain in May in Nantucket?

In Nantucket, in May, during 10 rainfall days, 3.4" (86.9mm) of precipitation is typically accumulated.

Does it snow in Nantucket in May?

In May, it doesn't snow. April is the latest month when it typically snows.

What is the ocean temperature in May in Nantucket?

In May, the average ocean temperature is 50°F (10°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

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

In Nantucket, the average length of the day in May is 14.5h.

How many hours of sunshine does Nantucket have in May?

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

What is the UV index reading in May in Nantucket?

The average daily maximum UV index in May is 7. A UV Index estimate of 6 to 7 represents a high health risk from the exposure to the Sun's UV rays.
Average temperature in May - Nantucket, MA
  • Average high temperature in May: 59.8°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 May: 46.1°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 May - Nantucket, MA
  • Average rainfall in May: 3.4"

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 May - Nantucket, MA
  • Average rainfall days in May: 10 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 May - Nantucket, MA
  • Average snowfall in May: 0"

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 May - Nantucket, MA
  • Average sea temperature in May: 49.9°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 May / Average sunshine in May - Nantucket, MA
  • Average daylight in May: 14.5h

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 May: 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 May - Nantucket, MA
  • Average UV index in May: 7

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).