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
The average high-temperature in August, at a pleasant 72.3°F (22.4°C), reveals a modest deviation from July's 74.3°F (23.5°C). Grand Isle experiences an average temperature drop to a fresh 52.7°F (11.5°C) during August nights.Humidity
The average relative humidity in August is 80%.Rainfall
In Grand Isle, during August, the rain falls for 16.2 days and regularly aggregates up to 2.32" (59mm) of precipitation. Throughout the year, there are 140.8 rainfall days, and 30.12" (765mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in August is 14h and 11min.On the first day of the month, sunrise is at 5:12 am and sunset at 8:05 pm. On the last day of August, sunrise is at 5:51 am and sunset at 7:14 pm EDT.
Sunshine
August has the most sunshine of the year, with an average of 9.5h of sunshine.UV index
In August, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 4 in August interprets into the following advice:
Exercise prevention - Precautions against solar damage are endorsed. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Grand Isle in August?
What is the average humidity in August?
How many days does it rain in August?
When it does not snow?
How many hours of daylight does Grand Isle have in August?
What time are sunrise and sunset in August?
What month has the most sunshine in Grand Isle?
How many hours of sunshine does Grand Isle have in August?
How high is the UV index in August?
Average temperature in August
Grand Isle, ME
- Average high temperature in August: 72.3°F
The warmest month (with the highest average high temperature) is July (74.3°F).
The month with the lowest average high temperature is January (18°F).
- Average low temperature in August: 52.7°F
The month with the highest average low temperature is July (53.6°F).
The coldest month (with the lowest average low temperature) is January (2.8°F).
Average pressure in August
Grand Isle, ME
- Average pressure in August: 29.92"Hg
The months with the highest atmospheric pressure are March, September and November (30.01"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in August
Grand Isle, ME
- Average wind speed in August: 6.4mph
The windiest months (with the highest average wind speed) are January and February (8.2mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).
Average humidity in August
Grand Isle, ME
- Average humidity in August: 80%
The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is May (76%).
Average rainfall in August
Grand Isle, ME
- Average rainfall in August: 2.32"
The wettest month (with the highest rainfall) is April (2.95").
The driest month (with the least rainfall) is February (1.97").
Average rainfall days in August
Grand Isle, ME
- Average rainfall days in August: 16.2 days
The month with the highest number of rainy days is July (17.1 days).
The months with the least rainy days are January and February (4.3 days).
Average snowfall in August
Grand Isle, ME
- Average snowfall in August: 0"
The month with the highest snowfall is January (14.92").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Grand Isle, ME
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (21.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in August /
Average sunshine in August
Grand Isle, ME
- Average daylight in August: 14h and 1min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in August: 9h and 3min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 2h and 6min).
Average sunshine days in August
Grand Isle, ME
- Average sunshine days in August: 13 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is April (7.9 days).
Average UV index in August
Grand Isle, ME
- Average UV index in August: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in August
Grand Isle, ME
- Average cloud cover in August: 43
The month with the most cloud cover is February (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in August
Grand Isle, ME
- Average visibility in August: 5mi
The months with the highest visibility are May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February, March, April and December (4mi).
Grand Isle, Maine, USA
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