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

August 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
August, the last month of the summer, in Nantucket, is also a moderately hot month, with average temperature fluctuating between 74.7°F (23.7°C) and 61.9°F (16.6°C).

Temperature

In Nantucket, the average high-temperature is essentially the same as in July - a still moderately hot 74.7°F (23.7°C). In August, in Nantucket, the average low-temperature is 61.9°F (16.6°C).

Rainfall

In Nantucket, in August, during 9 rainfall days, 3.9" (99.3mm) of precipitation is typically accumulated. Throughout the year, there are 120 rainfall days, and 44.4" (1128.3mm) of precipitation is accumulated.

Snowfall

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

Ocean temperature

The month with the warmest seawater is August, with an average ocean temperature of 67.6°F (19.8°C). Swimming in 67.6°F (19.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

The average length of the day in Nantucket is 13.8h.

Sunshine

In August, the average sunshine is 8h.

UV index

June through August, with an average maximum UV index of 8, are months with the highest UV index. A UV Index estimate of 8 to 10 represents a very high threat to health from unsafe exposure to the UV radiation for average individuals.
The average daily UV index of 8 transform into the following instructions:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in August in Nantucket?

In August, the average high-temperature is 74.7°F (23.7°C), and the average low-temperature is 61.9°F (16.6°C).

How many days does it rain in August in Nantucket?

In August, in Nantucket, Massachusetts, the rain falls for 9 days. Throughout August, 3.9" (99.3mm) of precipitation is accumulated.

What month is the ocean warmest in Nantucket?

The month with the warmest seawater in Nantucket is August, with an average ocean temperature of 67.6°F (19.8°C). Swimming in 67.6°F (19.8°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

What is the ocean temperature in August in Nantucket?

In Nantucket, the average seawater temperature in August is 67.6°F (19.8°C). For most, swimming in 67.6°F (19.8°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).

How many hours of daylight does Nantucket have in August?

The average length of the day in August in Nantucket is 13.8h.

How long on average sun shines in August in Nantucket?

The average sunshine in August in Nantucket, Massachusetts, 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.

What is the UV index reading in August in Nantucket?

In Nantucket, the average daily maximum UV index in August is 8. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to the UV radiation.
Average temperature in August - Nantucket, MA
  • Average high temperature in August: 74.7°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 August: 61.8°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 August - Nantucket, MA
  • Average rainfall in August: 3.9"

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 August - Nantucket, MA
  • Average rainfall days in August: 9 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 August - Nantucket, MA
  • Average snowfall in August: 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 August - Nantucket, MA
  • Average sea temperature in August: 67.6°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 August / Average sunshine in August - Nantucket, MA
  • Average daylight in August: 13.8h

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 August: 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 August - Nantucket, MA
  • Average UV index in August: 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).