Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
A clear escalation in the average high-temperature is witnessed in Grand Isle with the onset of May, advancing from a frosty 49.6°F (9.8°C) in April to an enjoyable 64.2°F (17.9°C). May's average low-temperature reading settles at a frosty 46°F (7.8°C).Humidity
The months with the lowest humidity in Grand Isle are April and May, with an average relative humidity of 76%.Rainfall
In Grand Isle, during May, the rain falls for 17.8 days and regularly aggregates up to 2.99" (76mm) of precipitation. In Grand Isle, during the entire year, the rain falls for 176.9 days and collects up to 29.88" (759mm) of precipitation.Snowfall
Months with snowfall in Grand Isle are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Grand Isle aggregates 0.04" (1mm) of snow. Throughout the year, there are 81.9 snowfall days, and 36.77" (934mm) of snow is accumulated.Daylight
In Grand Isle, the average length of the day in May is 14h and 50min.On the first day of May in Grand Isle, sunrise is at 5:41 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 5:10 am and sunset at 8:31 pm EDT.
Sunshine
In May, the average sunshine in Grand Isle is 8.8h.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 moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: In May, the maximum UV index of 5 suggests these recommendations:
Take necessary precautions - Suggestions to elude sunburn are provided. Direct Sun exposure should be minimized especially during midday when radiation is most intense. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Grand Isle in May?
What are the least humid months in Grand Isle?
What is the average humidity in May in Grand Isle?
How many days does it rain in May in Grand Isle?
What is the last month it snows in Grand Isle?
What is the average length of the day in May in Grand Isle?
What time are sunrise and sunset in May in Grand Isle?
How long on average sun shines in May in Grand Isle?
What is the month with the highest UV index in Grand Isle?
What is the UV index reading in May in Grand Isle?
Average temperature in May
Grand Isle, VT
- Average high temperature in May: 64.2°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 May: 46°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 May
Grand Isle, VT
- Average pressure in May: 29.97"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 May
Grand Isle, VT
- Average wind speed in May: 7.1mph
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 May
Grand Isle, VT
- Average humidity in May: 76%
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 May
Grand Isle, VT
- Average rainfall in May: 2.99"
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 May
Grand Isle, VT
- Average rainfall days in May: 17.8 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 May
Grand Isle, VT
- Average snowfall in May: 0.04"
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 May
Grand Isle, VT
- Average snowfall days in May: 0.3 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 May /
Average sunshine in May
Grand Isle, VT
- Average daylight in May: 14h and 5min
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 May: 8h and 5min
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 May
Grand Isle, VT
- Average sunshine days in May: 11.3 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 May
Grand Isle, VT
- Average UV index in May: 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 May
Grand Isle, VT
- Average cloud cover in May: 43
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 May
Grand Isle, VT
- Average visibility in May: 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
Weather forecast for your location
2. Allow the app to use your location