January 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 January

January, like December, in Grand Isle, Louisiana, is another enjoyable winter month, with an average temperature ranging between min 53.1°F (11.7°C) and max 61.7°F (16.5°C).

Temperature

With an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 53.1°F (11.7°C), January is the coldest month.

Humidity

The average relative humidity in January in Grand Isle is 75%.

Rainfall

In Grand Isle, Louisiana, during 10.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, there are 151.9 rainfall days, and 22.01" (559mm) of precipitation is accumulated.

Snowfall

January is the only month when snow falls in Grand Isle. The month with the most snowfall days is January, when snow falls for 0.1 days.

Ocean temperature

With an average ocean temperature of 61.3°F (16.3°C), January is the month with the coldest seawater in Grand Isle.
Note: For swimming, a surface water temperature of 61.3°F (16.3°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

Daylight

In January, the average length of the day in Grand Isle is 10h and 31min.
On the first day of January in Grand Isle, sunrise is at 6:54 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 5:37 pm CST.

Sunshine

The average sunshine in January in Grand Isle is 6h.

UV index

January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The average daily UV index of 4 in January transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Grand Isle?

With an average high-temperature of 61.7°F (16.5°C) and an average low-temperature of 53.1°F (11.7°C), January is the coldest month in Grand Isle.

What is the temperature in January in Grand Isle?

The average high-temperature, in January, in Grand Isle, is 61.7°F (16.5°C), while the average low-temperature is 53.1°F (11.7°C).

What is the average humidity in January in Grand Isle?

The average relative humidity in January is 75%.

How much does it rain in Grand Isle in January?

In Grand Isle, in January, during 10.3 rainfall days, 1.06" (27mm) of precipitation is typically accumulated.

When does it snow the most in Grand Isle?

The month with the most snowfall days in Grand Isle is January, when snow falls for 0.1 days.

When does it start to snow in Grand Isle?

January is the first month it typically snows. Throughout January, there are 0.1 snowfall days.

When is the ocean coldest in Grand Isle?

The month with the coldest seawater in Grand Isle, Louisiana, is January, with an average ocean temperature of 61.3°F (16.3°C).

How cold is the water in January in Grand Isle?

In January, the average ocean temperature in Grand Isle, Louisiana, is 61.3°F (16.3°C). Swimming in 61.3°F (16.3°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

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

In Grand Isle, the average day length in January is 10h and 31min.

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

On the first day of January in Grand Isle, Louisiana, sunrise is at 6:54 am and sunset at 5:13 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 5:37 pm CST.

How many hours of sunshine does Grand Isle have in January?

The average sunshine duration in January in Grand Isle, Louisiana, is 6h.

When is the lowest UV index in Grand Isle?

The months with the lowest UV index are January and December, with an average maximum UV index of 4.

What is the UV index reading in January in Grand Isle?

In Grand Isle, Louisiana, the average daily maximum UV index in January is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Grand Isle, LA

Average temperature in January - Grand Isle, LA
  • Average high temperature in January: 61.7°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 January: 53.1°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 January
Grand Isle, LA

Average pressure in January - Grand Isle, LA
  • Average pressure in January: 30.15"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 January
Grand Isle, LA

Average wind speed in January - Grand Isle, LA
  • Average wind speed in January: 12.4mph

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 January
Grand Isle, LA

Average humidity in January - Grand Isle, LA
  • Average humidity in January: 75%

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 January
Grand Isle, LA

Average rainfall in January - Grand Isle, LA
  • Average rainfall in January: 1.06"

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 January
Grand Isle, LA

Average rainfall days in January - Grand Isle, LA
  • Average rainfall days in January: 10.3 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 January
Grand Isle, LA

Average snowfall days in January - Grand Isle, LA
  • Average snowfall days in January: 0.1 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 January
Grand Isle, LA

Average sea temperature in January - Grand Isle, LA
  • Average sea temperature in January: 61.4°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 January /
Average sunshine in January
Grand Isle, LA

Average daylight in January / Average sunshine in January - Grand Isle, LA
  • Average daylight in January: 10h and 31min

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 January: 6h and 0min

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 January
Grand Isle, LA

Average sunshine days in January - Grand Isle, LA
  • Average sunshine days in January: 18.4 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).

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Average UV index in January
Grand Isle, LA

Average UV index in January - Grand Isle, LA
  • Average UV index in January: 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).

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Average cloud cover in January
Grand Isle, LA

Average cloud cover in January - Grand Isle, LA
  • Average cloud cover in January: 35

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 January
Grand Isle, LA

Average visibility in January - Grand Isle, LA
  • Average visibility in January: 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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