Contents
- Weather in August
- Frequently asked questions
- Average temperature in August
- Average pressure in August
- Average wind speed in August
- Average humidity in August
- Average rainfall in August
- Average rainfall days in August
- Average snowfall in August
- Average snowfall days in August
- Average daylight in August
- Average sunshine in August
- Average sunshine days in August
- Average UV index in August
- Average cloud cover in August
- Average visibility in August
Weather in August
Temperature
August tends to be the warmest month, with temperatures averaging a daily high of 72.5°F (22.5°C) and a low of 68.2°F (20.1°C).Humidity
In August, the average relative humidity is 81%.Rainfall
The month with the least rainfall is August, when the rain falls for 11.3 days and typically collects 0.94" (24mm) of precipitation.Snowfall
In Dennis, snow does not fall in May through November.Daylight
In August, the average length of the day is 13h and 49min.On the first day of August, 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.
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 value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In August, the UV index of 6 transforms into the following advice:
Use measures and accept sun safety conventions. Guarding against skin and eye trauma is of high priority. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the hottest time of year?
What is the average August temperature?
What is the average humidity in August?
What is the driest month?
How much does it rain in August?
When it does not snow?
What is the average length of the day in August?
When are sunrise and sunset in August?
What month has the most sunshine?
How many hours of sunshine does Dennis have in August?
What is the month with the highest UV index?
What is the UV index reading in August?
Average temperature in August
Dennis, MA
- Average high temperature in August: 72.5°F
The warmest month (with the highest average high temperature) is August (72.5°F).
The month with the lowest average high temperature is January (38.3°F).
- Average low temperature in August: 68.2°F
The month with the highest average low temperature is August (68.2°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in August
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
Dennis, MA
- Average wind speed in August: 10.4mph
The windiest month (with the highest average wind speed) is January (16.4mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity in August
Dennis, MA
- Average humidity in August: 81%
The months with the highest relative humidity are May, June and July (83%).
The month with the lowest relative humidity is November (74%).
Average rainfall in August
Dennis, MA
- Average rainfall in August: 0.94"
The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is August (0.94").
Average rainfall days in August
Dennis, MA
- Average rainfall days in August: 11.3 days
The month with the highest number of rainy days is May (13.2 days).
The month with the least rainy days is February (8.1 days).
Average snowfall in August
Dennis, MA
- Average snowfall in August: 0"
The months with the highest snowfall are January and February (0.63").
The months with the least snowfall are May, June, July, August, September, October and November (0").
Average snowfall days in August
Dennis, MA
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (6.6 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in August /
Average sunshine in August
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 month with the least sunshine is December (Average sunshine: 4h and 36min).
Average sunshine days in August
Dennis, MA
- Average sunshine days in August: 17.8 days
The month with the most sunshine days is September (18.5 days).
The month with the least sunshine days is February (14.8 days).
Average UV index in August
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
Dennis, MA
- Average cloud cover in August: 27
The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in August
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).
Dennis, Massachusetts, USA
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