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
With the onset of May, Grand Isle's average high-temperature experiences a noticeable rise, advancing from April's icy 40.8°F (4.9°C) to a moderate 58.8°F (14.9°C). Grand Isle observes an average low-temperature of 39.6°F (4.2°C) during May nights.Humidity
The least humid month in Grand Isle is May, with an average relative humidity of 76%.Rainfall
In Grand Isle, in May, during 16.6 rainfall days, 2.76" (70mm) of precipitation is typically accumulated. Throughout the year, in Grand Isle, there are 140.8 rainfall days, and 30.12" (765mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Grand Isle, Maine. May is the last month it regularly snows in Grand Isle, Maine. During 1.2 snowfall days, in May, Grand Isle aggregates 0.87" (22mm) of snow. Throughout the year, in Grand Isle, there are 107.8 snowfall days, and 71.34" (1812mm) of snow is accumulated.Daylight
In Grand Isle, the average length of the day in May is 15h and 7min.On the first day of the month, sunrise is at 5:14 am and sunset at 7:44 pm. On the last day of May, in Grand Isle, sunrise is at 4:40 am and sunset at 8:20 pm EDT.
Sunshine
The average sunshine in May in Grand Isle is 7.6h.UV index
In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum high UV index of 4 in May translates into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. During bright days, sunglasses that offer UVA and UVB defense are recommended. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
What is the usual temperature for Grand Isle in May?
What is the least humid month 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 many hours of sunshine does Grand Isle have in May?
How high is the UV index in May in Grand Isle?
Average temperature in May
Grand Isle, ME
- Average high temperature in May: 58.8°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 May: 39.6°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 May
Grand Isle, ME
- Average pressure in May: 29.96"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 May
Grand Isle, ME
- Average wind speed in May: 7.5mph
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 May
Grand Isle, ME
- Average humidity in May: 76%
The month with the highest relative humidity is March (94%).
The month with the lowest relative humidity is May (76%).
Average rainfall in May
Grand Isle, ME
- Average rainfall in May: 2.76"
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 May
Grand Isle, ME
- Average rainfall days in May: 16.6 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 May
Grand Isle, ME
- Average snowfall in May: 0.87"
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 May
Grand Isle, ME
- Average snowfall days in May: 1.2 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 May /
Average sunshine in May
Grand Isle, ME
- Average daylight in May: 15h 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 May: 7h and 4min
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 May
Grand Isle, ME
- Average sunshine days in May: 12.1 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 May
Grand Isle, ME
- Average UV index in May: 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 May
Grand Isle, ME
- Average cloud cover in May: 53
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 May
Grand Isle, ME
- Average visibility in May: 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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