Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall days in December
- Average sea temperature in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
Grand Isle's December showcases an average high-temperature of an enjoyable 64.9°F (18.3°C), hardly distinct from November's 69.8°F (21°C). In December, Grand Isle's nights cool slightly to a consistent average temperature of 56.7°F (13.7°C).Humidity
The months with the highest humidity in Grand Isle are February and December, with an average relative humidity of 78%.Rainfall
In Grand Isle, in December, it is raining for 11.9 days, with typically 1.65" (42mm) of accumulated precipitation. In Grand Isle, during the entire year, the rain falls for 151.9 days and collects up to 22.01" (559mm) of precipitation.Snowfall
In Grand Isle, snow does not fall in February through December.Ocean temperature
In Grand Isle, in December, the average water temperature is 64.2°F (17.9°C).Note: The majority of people do not enjoy swimming in 64.2°F (17.9°C). The difficulty in controlling breathing escalates as the temperature descends from 69.8°F (21°C) to 59°F (15°C).
Daylight
The month with the shortest days is December, with an average of 10h and 18min of daylight.On the first day of the month, sunrise is at 6:37 am and sunset at 5:01 pm. On the last day of December, in Grand Isle, sunrise is at 6:53 am and sunset at 5:12 pm CST.
Sunshine
The month with the least sunshine in Grand Isle, Louisiana, is December, with an average of 5.4h of sunshine.UV index
January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum daily UV index of 4 during December morphs into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Frequently asked questions
What is the average December temperature in Grand Isle?
What is the most humid month in Grand Isle?
What is the average humidity in December in Grand Isle?
How many days does it rain in December in Grand Isle?
When it does not snow in Grand Isle?
Does it snow in Grand Isle in December?
What is the ocean temperature in December in Grand Isle?
What is the month with the shortest days in Grand Isle?
How many hours of daylight does Grand Isle have in December?
When is the sunrise / sunset in December in Grand Isle?
What is the month with the least sunshine in Grand Isle?
How long on average sun shines in December in Grand Isle?
What are the months with the lowest UV index in Grand Isle?
What is the UV index intensity in December in Grand Isle?
Average temperature in December
Grand Isle, LA
- Average high temperature in December: 64.9°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 December: 56.7°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 December
Grand Isle, LA
- Average pressure in December: 30.11"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 December
Grand Isle, LA
- Average wind speed in December: 12.2mph
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 December
Grand Isle, LA
- Average humidity in December: 78%
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 December
Grand Isle, LA
- Average rainfall in December: 1.65"
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 December
Grand Isle, LA
- Average rainfall days in December: 11.9 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 December
Grand Isle, LA
- Average snowfall days in December: 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 December
Grand Isle, LA
- Average sea temperature in December: 64.1°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 December /
Average sunshine in December
Grand Isle, LA
- Average daylight in December: 10h and 2min
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 December: 5h and 2min
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 December
Grand Isle, LA
- Average sunshine days in December: 16.3 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 December
Grand Isle, LA
- Average UV index in December: 4
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 December
Grand Isle, LA
- Average cloud cover in December: 42
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 December
Grand Isle, LA
- Average visibility in December: 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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