August weather forecast
East Dennis, MA

Share

Weather in August

The last month of the summer, August, is also an agreeable month in East Dennis, Massachusetts, with an average temperature ranging between max 72.1°F (22.3°C) and min 68.5°F (20.3°C).

Temperature

August, on average, is the warmest month, registering a high temperature of 72.1°F (22.3°C) and a low of 68.5°F (20.3°C).

Humidity

In August, the average relative humidity is 81%.

Rainfall

The month with the least rainfall in East Dennis is August, when the rain falls for 11.2 days and typically collects 0.94" (24mm) of precipitation.

Snowfall

In East Dennis, snow does not fall in May through November.

Ocean temperature

With an average ocean temperature of 67.5°F (19.7°C), August is the month with the warmest seawater.
Note: For the majority of people, swimming in water at 67.5°F (19.7°C) is not enjoyable. The challenge of controlling breathing escalates as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).

Daylight

In East Dennis, the average length of the day in August is 13h and 49min.
On the first day of the month, sunrise is at 5:35 am and sunset at 7:58 pm. On the last day of August, sunrise is at 6:06 am and sunset at 7:15 pm EDT.

Sunshine

With an average of 10.8h of sunshine, August has the most sunshine of the year.

UV index

The months with the highest UV index are July and August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum high UV index of 6 in August translates into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Updated: Jul 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the hottest?

August, noted for its average high-temperature of 72.1°F (22.3°C) and an average low-temperature of 68.5°F (20.3°C), is considered the warmest month.

What are the temperatures in August?

The average high-temperature, in August, in East Dennis, is 72.1°F (22.3°C), while the average low-temperature is 68.5°F (20.3°C).

What is the average humidity in August?

In East Dennis, the average relative humidity in August is 81%.

What is the driest month?

The month with the least rainfall in East Dennis is August, when the rain falls for 11.2 days and typically collects 0.94" (24mm) of precipitation.

How much does it rain in August?

In East Dennis, in August, it is raining for 11.2 days, with typically 0.94" (24mm) of accumulated precipitation.

When it does not snow?

May through November are months without snowfall.

What is the month with the warmest ocean in East Dennis?

August is the month with the warmest seawater, with an average ocean temperature of 67.5°F (19.7°C).

What is the ocean temperature in August?

In August, the average ocean temperature is 67.5°F (19.7°C). For swimming, a surface water temperature of 67.5°F (19.7°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 August?

In East Dennis, the average day length in August is 13h and 49min.

What time are sunrise and sunset in August?

In August, on the first day of the month, sunrise is at 5:35 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 7:15 pm EDT.

What month has the most sunshine?

With an average of 10.8h of sunshine, August has the most sunshine of the year.

How long on average sun shines in August?

The average sunshine duration in August in East Dennis is 10.8h.

When is the highest UV index?

The months with the highest UV index are July and August, with an average maximum UV index of 6.

What is the UV index reading in August?

In August, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in August
East Dennis, MA

Average temperature in August - East Dennis, MA
  • Average high temperature in August: 72.1°F

The warmest month (with the highest average high temperature) is August (72.1°F).
The month with the lowest average high temperature is January (38.5°F).

  • Average low temperature in August: 68.5°F

The month with the highest average low temperature is August (68.5°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

Average pressure in August
East Dennis, MA

Average pressure in August - East Dennis, MA
  • Average pressure in August: 29.98"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in August
East Dennis, MA

Average wind speed in August - East Dennis, MA
  • Average wind speed in August: 10.9mph

The windiest month (with the highest average wind speed) is January (16.8mph).
The calmest months (with the lowest average wind speed) are July and August (10.9mph).

Average humidity in August
East Dennis, MA

Average humidity in August - East Dennis, MA
  • Average humidity in August: 81%

The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (74%).

Average rainfall in August
East Dennis, MA

Average rainfall in August - East Dennis, MA
  • Average rainfall in August: 0.94"

The wettest month (with the highest rainfall) is October (1.93").
The driest month (with the least rainfall) is August (0.94").

Average rainfall days in August
East Dennis, MA

Average rainfall days in August - East Dennis, MA
  • Average rainfall days in August: 11.2 days

The month with the highest number of rainy days is May (12.5 days).
The month with the least rainy days is February (8.3 days).

Average snowfall in August
East Dennis, MA

Average snowfall in August - East Dennis, MA
  • Average snowfall in August: 0"

The month with the highest snowfall is January (0.87").
The months with the least snowfall are May, June, July, August, September, October and November (0").

Average snowfall days in August
East Dennis, MA

Average snowfall days in August - East Dennis, MA
  • Average snowfall days in August: 0 days

The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in August
East Dennis, MA

Average sea temperature in August - East Dennis, MA
  • Average sea temperature in August: 67.5°F

The best month for swimming (with the highest average sea temperature) is August (67.5°F).
The coldest month (with the lowest average sea temperature) is March (39°F).

Average daylight in August /
Average sunshine in August
East Dennis, MA

Average daylight in August / Average sunshine in August - East Dennis, MA
  • Average daylight in August: 13h and 5min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in August: 10h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 4h and 36min).

Average sunshine days in August
East Dennis, MA

Average sunshine days in August - East Dennis, MA
  • Average sunshine days in August: 18.3 days

The month with the most sunshine days is September (18.6 days).
The month with the least sunshine days is February (14.3 days).

Average UV index in August
East Dennis, MA

Average UV index in August - East Dennis, MA
  • Average UV index in August: 6

The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in August
East Dennis, MA

Average cloud cover in August - East Dennis, MA
  • Average cloud cover in August: 27

The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in August
East Dennis, MA

Average visibility in August - East Dennis, MA
  • Average visibility in August: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

East Dennis, Massachusetts, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location