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

July 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
July is a moderately hot summer month in Nantucket, Massachusetts, with average temperature fluctuating between 75°F (23.9°C) and 62.2°F (16.8°C).

Temperature

July is the warmest month, with an average high-temperature of 75°F (23.9°C) and an average low-temperature of 62.2°F (16.8°C).

Rainfall

In July, in Nantucket, the rain falls for 7 days. Throughout July, 3.1" (78.5mm) of precipitation is accumulated. In Nantucket, Massachusetts, during the entire year, the rain falls for 120 days and collects up to 44.4" (1128.3mm) of precipitation.

Snowfall

Throughout the year, in Nantucket, 29.3" (744.2mm) of snow is accumulated.

Ocean temperature

In Nantucket, Massachusetts, in July, the average water temperature is 64.9°F (18.3°C). For most, swimming in 64.9°F (18.3°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In Nantucket, the average length of the day in July is 14.8h.

Sunshine

The average sunshine in Nantucket, Massachusetts, is 8h.

UV index

Months with the highest UV index in Nantucket are June through August, with an average maximum UV index of 8. A UV Index of 8 to 10 symbolizes a very high threat to health from unsafe exposure to the UV radiation for average individuals.
In July, the average maximum UV index of 8 translate into the following recommendations:
Take extra precautions. Protection against sun 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 warmest month in Nantucket?

July is the warmest month in Nantucket, with an average high-temperature of 75°F (23.9°C) and an average low-temperature of 62.2°F (16.8°C).

What is the temperature in July in Nantucket?

In Nantucket, in July, the average high-temperature is 75°F (23.9°C), and the average low-temperature is 62.2°F (16.8°C).

How many days does it rain in July in Nantucket?

In Nantucket, Massachusetts, in July, during 7 rainfall days, 3.1" (78.5mm) of precipitation is typically accumulated.

What is the ocean temperature in July in Nantucket?

In Nantucket, the average seawater temperature in July is 64.9°F (18.3°C). For swimming, a surface water temperature of 64.9°F (18.3°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

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

In Nantucket, Massachusetts, the average length of the day in July is 14.8h.

How many hours of sunshine does Nantucket have in July?

In Nantucket, Massachusetts, the average sunshine in July is 8h.

When is the highest UV index in Nantucket?

June through August, with an average maximum UV index of 8, are months with the highest UV index in Nantucket, Massachusetts.

How high is the UV index in July in Nantucket?

In Nantucket, Massachusetts, the average daily maximum UV index in July is 8. A UV Index reading of 8 to 10 represents a very high health threat from the exposure to the Sun's UV radiation.
Average temperature in July - Nantucket, MA
  • Average high temperature in July: 75.1°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 July: 62.2°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 July - Nantucket, MA
  • Average rainfall in July: 3.1"

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 July - Nantucket, MA
  • Average rainfall days in July: 7 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 July - Nantucket, MA
  • Average snowfall in July: 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 July - Nantucket, MA
  • Average sea temperature in July: 64.9°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 July / Average sunshine in July - Nantucket, MA
  • Average daylight in July: 14.8h

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 July: 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 July - Nantucket, MA
  • Average UV index in July: 8

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).