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 days in May
- Average sea temperature 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
May in Grand Isle witnesses a minor rise in the average high-temperature, transitioning from a moderately hot 74.3°F (23.5°C) in April to a still warm 80.1°F (26.7°C). Grand Isle's May nights witness minimal differential from the daytime temperatures, with averages of 73.2°F (22.9°C).Humidity
In Grand Isle, the average relative humidity in May is 76%.Rainfall
In Grand Isle, in May, during 10 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. In Grand Isle, during the entire year, the rain falls for 151.9 days and collects up to 22.01" (559mm) of precipitation.Snowfall
February through December are months without snowfall in Grand Isle.Ocean temperature
In May, the average ocean temperature in Grand Isle is 78.4°F (25.8°C).Note: Swimming, diving, and other water activities in temperatures ranging from 77°F (25°C) to 84.2°F (29°C) are highly enjoyable and provide prolonged comfort without unease.
Daylight
In Grand Isle, the average length of the day in May is 13h and 37min.On the first day of May, sunrise is at 6:17 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 6:01 am and sunset at 7:54 pm CDT.
Sunshine
In May, the average sunshine in Grand Isle is 10.9h.UV index
The months with the highest UV index in Grand Isle, Louisiana, are May through September, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 7 in May transforms into this advice:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Heads up! The reflection of sand and water notably intensifies UV rays from the Sun.
Frequently asked questions
What is the average May temperature in Grand Isle?
What is the average humidity in May in Grand Isle?
How much does it rain in Grand Isle in May?
When it does not snow in Grand Isle?
What is the water temperature in May in Grand Isle?
How many hours of daylight does Grand Isle have in May?
When is the sunrise / sunset in May in Grand Isle?
How long on average sun shines in May in Grand Isle?
What are the months with the highest UV index in Grand Isle?
How high is the UV index in May in Grand Isle?
Average temperature in May
Grand Isle, LA
- Average high temperature in May: 80.1°F
The warmest months (with the highest average high temperature) are July and August (86.9°F).
The month with the lowest average high temperature is January (61.7°F).
- Average low temperature in May: 73.2°F
The month with the highest average low temperature is August (81.3°F).
The coldest month (with the lowest average low temperature) is January (53.1°F).
Average pressure in May
Grand Isle, LA
- Average pressure in May: 29.99"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is September (29.96"Hg).
Average wind speed in May
Grand Isle, LA
- Average wind speed in May: 10.1mph
The windiest month (with the highest average wind speed) is January (12.4mph).
The calmest month (with the lowest average wind speed) is July (8mph).
Average humidity in May
Grand Isle, LA
- Average humidity in May: 76%
The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Grand Isle, LA
- Average rainfall in May: 1.22"
The wettest month (with the highest rainfall) is August (4.72").
The driest months (with the least rainfall) are February and April (0.87").
Average rainfall days in May
Grand Isle, LA
- Average rainfall days in May: 10 days
The month with the highest number of rainy days is August (20.7 days).
The month with the least rainy days is November (7.5 days).
Average snowfall days in May
Grand Isle, LA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (0.1 days).
The months with the least snowfall days are February, March, April, May, June, July, August, September, October, November and December (0 days).
Average sea temperature in May
Grand Isle, LA
- Average sea temperature in May: 78.5°F
The best month for swimming (with the highest average sea temperature) is August (87.5°F).
The coldest month (with the lowest average sea temperature) is January (61.4°F).
Average daylight in May /
Average sunshine in May
Grand Isle, LA
- Average daylight in May: 13h and 4min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in May: 10h and 5min
The month with the most sunshine is June (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in May
Grand Isle, LA
- Average sunshine days in May: 17.4 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is August (6.5 days).
Average UV index in May
Grand Isle, LA
- Average UV index in May: 7
The months with the highest UV index are May, June, July, August and September (UV index 7).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in May
Grand Isle, LA
- Average cloud cover in May: 23
The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is May (Cloud cover 23).
Average visibility in May
Grand Isle, LA
- Average visibility in May: 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).
Grand Isle, Louisiana, USA
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