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
With the transition into August, Grand Isle notes an average high-temperature of a still warm 75.9°F (24.4°C), closely resembling July. Throughout August, the temperature in Grand Isle tends to fall to a consistent average low of 57.6°F (14.2°C).Humidity
In August, the average relative humidity in Grand Isle is 78%.Rainfall
In August, the rain falls for 18 days. Throughout August, 2.95" (75mm) of precipitation is accumulated. Throughout the year, there are 176.9 rainfall days, and 29.88" (759mm) of precipitation is accumulated.Snowfall
In Grand Isle, Vermont, snow does not fall in June through September.Daylight
In August, the average length of the day is 14h and 0min.On the first day of the month, sunrise is at 5:40 am and sunset at 8:18 pm. On the last day of August, in Grand Isle, sunrise is at 6:15 am and sunset at 7:31 pm EDT.
Sunshine
August has the most sunshine of the year in Grand Isle, with an average of 10.5h of sunshine.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during August translates into these guidelines:
Adopt protective measures - Suggestions to resist sunburn are offered. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Grand Isle in August?
What is the average humidity in August in Grand Isle?
How much does it rain in Grand Isle in August?
When it does not snow in Grand Isle?
What is the average length of the day in August in Grand Isle?
What time are sunrise and sunset in August in Grand Isle?
What month has the most sunshine in Grand Isle?
How long on average sun shines in August in Grand Isle?
When is the highest UV index in Grand Isle?
What is the UV index reading in August in Grand Isle?
Average temperature in August
Grand Isle, VT
- Average high temperature in August: 75.9°F
The warmest month (with the highest average high temperature) is July (77.5°F).
The month with the lowest average high temperature is January (24.3°F).
- Average low temperature in August: 57.6°F
The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (12°F).
Average pressure in August
Grand Isle, VT
- Average pressure in August: 29.96"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in August
Grand Isle, VT
- Average wind speed in August: 6.1mph
The windiest month (with the highest average wind speed) is April (8mph).
The calmest months (with the lowest average wind speed) are July and August (6.1mph).
Average humidity in August
Grand Isle, VT
- Average humidity in August: 78%
The months with the highest relative humidity are January and February (87%).
The months with the lowest relative humidity are April and May (76%).
Average rainfall in August
Grand Isle, VT
- Average rainfall in August: 2.95"
The wettest month (with the highest rainfall) is June (3.23").
The driest month (with the least rainfall) is September (1.81").
Average rainfall days in August
Grand Isle, VT
- Average rainfall days in August: 18 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is January (9.4 days).
Average snowfall in August
Grand Isle, VT
- Average snowfall in August: 0"
The month with the highest snowfall is February (9.49").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in August
Grand Isle, VT
- Average snowfall days in August: 0 days
The month with the highest number of snowfall days is January (19.4 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, VT
- Average daylight in August: 14h and 0min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in August: 10h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 24min).
Average sunshine days in August
Grand Isle, VT
- Average sunshine days in August: 10.3 days
The month with the most sunshine days is September (15.3 days).
The month with the least sunshine days is February (6.5 days).
Average UV index in August
Grand Isle, VT
- Average UV index in August: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in August
Grand Isle, VT
- Average cloud cover in August: 31
The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in August
Grand Isle, VT
- Average visibility in August: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January and February (4mi).
Grand Isle, Vermont, USA
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