October weather forecast
Grand Isle, LA

The scenic Grand Isle, Louisiana, with a view of the numerous houses and the extended piers onto the calm seawater
The scenic Grand Isle, Louisiana, with a view of the numerous houses and the extended piers onto the calm seawater

Weather in October

October, the same as September, is a moderately hot autumn month in Grand Isle, Louisiana, with an average temperature varying between 71.2°F (21.8°C) and 78.3°F (25.7°C).

Temperature

In October, the average high-temperature slightly decreases from 84.6°F (29.2°C) in September to a still moderately hot 78.3°F (25.7°C). The average low-temperature, in Grand Isle, is 71.2°F (21.8°C).

Humidity

With an average relative humidity of 71%, October is the least humid month.

Rainfall

In Grand Isle, during 10.1 rainfall days, 1.34" (34mm) of precipitation is typically accumulated. Throughout the year, there are 151.9 rainfall days, and 22.01" (559mm) of precipitation is accumulated.

Snowfall

In Grand Isle, snow does not fall in February through December.

Ocean temperature

In Grand Isle, Louisiana, in October, the average water temperature is 78.3°F (25.7°C).
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Grand Isle, Louisiana, the average length of the day in October is 11h and 27min.
On the first day of October, sunrise is at 6:53 am and sunset at 6:46 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:15 pm CDT.

Sunshine

The average sunshine in October in Grand Isle is 7.5h.

UV index

In Grand Isle, the average daily maximum UV index in October is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in October interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in October in Grand Isle?

The average high-temperature, in October, is 78.3°F (25.7°C), while the average low-temperature is 71.2°F (21.8°C). in September, the average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, is calculated to be 93.2°F (34°C).

What is the least humid month in Grand Isle?

October is the least humid month in Grand Isle, with an average relative humidity of 71%.

What is the average humidity in October in Grand Isle?

The average relative humidity in October is 71%.

How much does it rain in Grand Isle in October?

In Grand Isle, in October, it is raining for 10.1 days, with typically 1.34" (34mm) of accumulated precipitation.

When it does not snow in Grand Isle?

February through December are months without snowfall in Grand Isle.

How warm is the water in October in Grand Isle?

In October, the average ocean temperature in Grand Isle is 78.3°F (25.7°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in October in Grand Isle?

The average day length in October in Grand Isle is 11h and 27min.

When is the sunrise / sunset in October in Grand Isle?

On the first day of October in Grand Isle, sunrise is at 6:53 am and sunset at 6:46 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:15 pm CDT.

How long on average sun shines in October in Grand Isle?

In October, the average sunshine duration in Grand Isle, Louisiana, is 7.5h.

What is the UV index intensity in October in Grand Isle?

In Grand Isle, Louisiana, the average daily maximum UV index in October is 6. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Grand Isle, LA

Average temperature in October - Grand Isle, LA
  • Average high temperature in October: 78.3°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 October: 71.2°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).

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Average pressure in October
Grand Isle, LA

Average pressure in October - Grand Isle, LA
  • Average pressure in October: 30.01"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).

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Average wind speed in October
Grand Isle, LA

Average wind speed in October - Grand Isle, LA
  • Average wind speed in October: 11mph

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).

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Average humidity in October
Grand Isle, LA

Average humidity in October - Grand Isle, LA
  • Average humidity in October: 71%

The months with the highest relative humidity are February and December (78%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in October
Grand Isle, LA

Average rainfall in October - Grand Isle, LA
  • Average rainfall in October: 1.34"

The wettest month (with the highest rainfall) is August (4.72").
The driest months (with the least rainfall) are February and April (0.87").

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Average rainfall days in October
Grand Isle, LA

Average rainfall days in October - Grand Isle, LA
  • Average rainfall days in October: 10.1 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).

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Average snowfall days in October
Grand Isle, LA

Average snowfall days in October - Grand Isle, LA
  • Average snowfall days in October: 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).

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Average sea temperature in October
Grand Isle, LA

Average sea temperature in October - Grand Isle, LA
  • Average sea temperature in October: 78.3°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).

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Average daylight in October /
Average sunshine in October
Grand Isle, LA

Average daylight in October / Average sunshine in October - Grand Isle, LA
  • Average daylight in October: 11h and 27min

The month with the longest days is June (Average daylight: 13h and 59min).
The month with the shortest days is December (Average daylight: 10h and 19min).

  • Average sunshine in October: 7h and 30min

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).

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Average sunshine days in October
Grand Isle, LA

Average sunshine days in October - Grand Isle, LA
  • Average sunshine days in October: 17.7 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).

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Average UV index in October
Grand Isle, LA

Average UV index in October - Grand Isle, LA
  • Average UV index in October: 6

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).

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Average cloud cover in October
Grand Isle, LA

Average cloud cover in October - Grand Isle, LA
  • Average cloud cover in October: 24

The month with the most cloud cover is December (Cloud cover 42).
The month with the least cloud cover is May (Cloud cover 23).

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Average visibility in October
Grand Isle, LA

Average visibility in October - Grand Isle, LA
  • Average visibility in October: 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).

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