When is the best time to go to Grand Isle
The chart above shows the best time of year to visit Grand Isle, United States. These are based on an analysis of weather averages such as temperature, rainfall and number of hours of sunshine. These ratings are based solely on the climate and do not take into account other factors such as accommodation prices and how busy it is likely to be.
Average temperatures in Grand Isle
Grand Isle weather by month
Please note our recommendations for when to visit Grand Isle are based solely on the weather and do not take into accounts accommodation prices, how busy it will be and what events are on.
January
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 15°C | 127mm | 6.2hrs | 11.4hrs | 18°C |
Mild and wet weather often prevails in Grand Isle during the month of January
Based on weather alone, this is probably a time of year to avoid going to Grand Isle for your holidays. The weather is often pretty bad and not conducive to spending time outdoors.
January is in the winter in Grand Isle and is typically the coldest month of the year. Daytime maximum temperatures average around a cool 17°C (62°F), whilst at night 7°C (44°F) is normal.
On average January is the driest month of the year in Grand Isle with around 127mm 5 inches of rain making it a wet time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.2 hours of sunshine per day.
Grand Isle weather in January »
February
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 16°C | 123mm | 7.1hrs | 12hrs | 18°C |
February in Grand Isle is generally wet with the temperature being mild.
Although outside the main holiday season, there is still plenty of pretty acceptable weather around this time of year. This makes it an okay time to visit Grand Isle.
February is in the winter in Grand Isle and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around 18°C (64°F), whilst at night 8°C (47°F) is normal.
On average February is the 2nd driest month of the year in Grand Isle with around 123mm 4.8 inches of rain making it a wet time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.1 hours of sunshine per day.
Grand Isle weather in February »
March
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 19°C | 113mm | 8.2hrs | 12.8hrs | 19°C |
The weather in March in Grand Isle is characteristically mild and damp.
Although outside the main holiday season, there is still plenty of quite acceptable weather around this time of year. This makes it an okay time to visit Grand Isle.
March is in the spring in Grand Isle and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around 22°C (71°F), whilst at night 12°C (54°F) is normal.
On average March is the 3rd driest month of the year in Grand Isle with around 113mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.2 hours of sunshine per day.
April
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 23°C | 120mm | 9.7hrs | 13.7hrs | 22°C |
Grand Isle's weather in April is typically warm, humid and wet in nature.
It is perhaps a good month to visit Grand Isle, with some particularly good weather at this time of year.
April is in the spring in Grand Isle and is typically the 4th coldest month of the year. Daytime maximum temperatures average around a muggy 25°C (78°F), whilst at night 16°C (61°F) is normal.
On average April is the 4th driest month of the year in Grand Isle with around 120mm 4.7 inches of rain making it a wet time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.7 hours of sunshine per day.
May
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 26°C | 124mm | 10hrs | 14.4hrs | 25°C |
May is a wet, humid month in Grand Isle and the temperature is generally hot.
It is perhaps a good month to visit Grand Isle, with some extremely good weather at this time of year.
May is in the spring in Grand Isle and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a muggy 29°C (84°F), whilst at night 20°C (67°F) is normal.
On average May is the 5th driest month of the year in Grand Isle with around 124mm 4.9 inches of rain making it a wet time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 10 hours of sunshine per day.
June
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 28°C | 136mm | 9.4hrs | 11.4hrs | 28°C |
June in Grand Isle is generally wet with the temperature being hot.
Based on weather alone, this is probably a time of year to avoid going to Grand Isle for your holidays. The weather is often relatively bad and not conducive to spending time outdoors.
June is in the summer in Grand Isle and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a steamy 31°C (89°F), whilst at night 23°C (73°F) is normal.
On average June is the 6th driest month of the year in Grand Isle with around 136mm 5.3 inches of rain making it a wet time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.4 hours of sunshine per day.
July
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 29°C | 168mm | 8.8hrs | 12hrs | 30°C |
July in Grand Isle is generally wet with the temperature being hot.
Based on weather alone, this is probably a time of year to avoid going to Grand Isle for your holidays. The weather is often not a good and not conducive to spending time outdoors.
July is in the summer in Grand Isle and is typically the 6th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 24°C (74°F) is normal.
On average July is the 6th wettest month of the year in Grand Isle with around 168mm 6.6 inches of rain making it a wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.8 hours of sunshine per day.
August
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 29°C | 169mm | 8.6hrs | 12.8hrs | 30°C |
The weather in August in Grand Isle is characteristically hot, humid and wet.
Based on weather alone, this is probably a time of year to avoid going to Grand Isle for your holidays. The weather is often not a good and not conducive to spending time outdoors.
August is in the summer in Grand Isle and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a steamy 32°C (90°F), whilst at night 23°C (74°F) is normal.
On average August is the 5th wettest month of the year in Grand Isle with around 169mm 6.7 inches of rain making it a wet time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.6 hours of sunshine per day.
Grand Isle weather in August »
September
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 27°C | 165mm | 8.1hrs | 13.7hrs | 29°C |
Grand Isle's weather in September is typically hot, humid and wet in nature.
Based on weather alone, this is probably a time of year to avoid going to Grand Isle for your holidays. The weather is often not a good and not conducive to spending time outdoors.
September is in the fall / autumn in Grand Isle and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a steamy 30°C (87°F), whilst at night 22°C (71°F) is normal.
On average September is the 4th wettest month of the year in Grand Isle with around 165mm 6.5 inches of rain making it a wet time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.1 hours of sunshine per day.
Grand Isle weather in September »
October
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 24°C | 82mm | 8.3hrs | 14.4hrs | 26°C |
October is a a little damp, humid month in Grand Isle and the temperature is generally warm.
It is perhaps the perfect month to visit Grand Isle, with some extremely good weather at this time of year.
October is in the fall / autumn in Grand Isle and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a muggy 26°C (80°F), whilst at night 16°C (61°F) is normal.
On average October is the 3rd wettest month of the year in Grand Isle with around 82mm 3.2 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.3 hours of sunshine per day.
Grand Isle weather in October »
November
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 20°C | 97mm | 7hrs | 11.4hrs | 22°C |
Mild and a little damp weather often prevails in Grand Isle during the month of November
It is perhaps a good month to visit Grand Isle, with some inordinately good weather at this time of year.
November is in the fall / autumn in Grand Isle and is typically the 2nd warmest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 12°C (54°F) is normal.
On average November is the 2nd wettest month of the year in Grand Isle with around 97mm 3.8 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
Grand Isle weather in November »
December
| Temp | Rain | Sunshine | Day length | Sea temp |
|---|---|---|---|---|
| 17°C | 114mm | 6.4hrs | 12hrs | 20°C |
December in Grand Isle is generally damp with the temperature being mild.
Although outside the main holiday season, there is still plenty of fairly acceptable weather around this time of year. This makes it an okay time to visit Grand Isle.
December is in the winter in Grand Isle and is typically the warmest month of the year. Daytime maximum temperatures average around 18°C (65°F), whilst at night 9°C (48°F) is normal.
On average December is the wettest month of the year in Grand Isle with around 114mm 4.5 inches of rain making it a damp time to visit. This rainfall is typically spread over 9 days, although this may vary considerably.
On the flip side this corresponds to an average of 6.4 hours of sunshine per day.
Other monthly averages
Grand Isle weather stats
| Hottest month: | July | 32.1°C 89.8°F |
|---|---|---|
| Driest month: | October | 82mm 3.2ins |
| Sunniest month: | April | 9.7hrs |
| Coldest month: | January | 16.3°C 61.3°F |
| Wettest month: | August | 169mm 6.7ins |
| Warmest sea: | August | 29.7°C 85.5°F |
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