Grand Isle in july: average Weather, Temperature and Climate
Weather in Grand Isle in july 2025
The weather in Grand Isle in july comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout july
tolerable weather UV index: 7
Weather at 6am
83°F
Clear/Sunny
37% of time
25%
24%
10%
Weather at 12pm
88°F
Clear/Sunny
38% of time
28%
20%
13%
Weather at 6pm
86°F
Clear/Sunny
53% of time
20%
20%
6%
Weather at 3am
83°F
41%
27%
22%
8%
Evolution of daily average temperature and precipitation in Grand Isle in july
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Grand Isle in july.
The climate of Grand Isle in july is tolerable
The weather in july in Grand Isle is wet (with 8in of rainfall over 13 days). The weather is worst than the previous month since in june there is an average of 6.6in of rainfall over 10 days.
The climate is very warm in that area the month of july. Temperatures are up to 88°F. On average, the recorded minimum temperature is 83°F. Thus, the mean temperature average on this month of july in Grand Isle is 85°F. These temperatures are far removed from those records observed in Grand Isle in the month of july with a maximum record of 94°F in 2015 and a minimum record of 70°F in 2021. You can expect to have about 24 days with temperatures up to 86°F, or 77 of the month.
On average, in Grand Isle, the days of july last 13:50. The sun rises at 06:11 and sunset is at 20:01.
With a good weather, july is a good time to go in this locality.
Grand Isle: another month?
If you can push the dates of your trip to Grand Isle forward, the month of august has a better weather forecast than july. more information
July: another location in Louisiana?
If you want to go to Louisiana in july, there are destinations with better weather than Grand Isle:
In july, New Orleans, Shreveport, Alexandria (Louisiane), Cameron, Holly Beach and Houma have good weather.
Seasonal average climate and temperature of Grand Isle in july
Check below seasonal norms These datas are compiled from the weather statements earlier years of the month of july.
| July | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 88°F | ||||
| Lowest temperature | 83°F | ||||
| Highest record temperature | 94°F (2015) | ||||
| Lowest record temperature | 70°F (2021) | ||||
| Number of days at +86°F | 24 day(s) (77%) | ||||
| Number of days at +65°F | 31 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 87°F | ||||
| Lowest sea temperature | 85°F | ||||
| Highest sea temperature | 90°F | ||||
| Wind | |||||
| Wind speed | 17km/h | ||||
| Wind temperature | 83°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 8in | ||||
| Number of days with rainfall | 13 day(s) (43%) | ||||
| Record daily rainfall | 1.7in (2018) | ||||
| Other climate data | |||||
| Humidity | 80% | ||||
| Visibility | 9.42km | ||||
| Cloud cover | 27% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:11 | ||||
| Time of sunset | 20:01 | ||||
| Length of day | 13:50 | ||||
| Our opinion about the weather in july | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last july?
Here is the day by day recorded weather in Grand Isle in july 2024:
83°F to 88°F
83°F to 86°F
85°F to 86°F
85°F to 86°F
83°F to 88°F
83°F to 90°F
85°F to 86°F
86°F to 86°F
85°F to 86°F
81°F to 85°F
83°F to 86°F
83°F to 86°F
83°F to 86°F
83°F to 86°F
83°F to 86°F
85°F to 86°F
85°F to 86°F
85°F to 86°F
81°F to 88°F
85°F to 86°F
79°F to 85°F
81°F to 85°F
79°F to 85°F
83°F to 86°F
81°F to 83°F
83°F to 85°F
85°F to 85°F
85°F to 86°F
85°F to 88°F
85°F to 88°F
83°F to 86°F
Map: other cities in Louisiana in july
Cities near Grand Isle:
| Port Sulphur in july | tolerable weather |
| New Orleans in july | good weather |
| Houma in july | good weather |
| Slidell in july | tolerable weather |
| Morgan City in july | good weather |
| Baton Rouge in july | tolerable weather |
| Marsh Island in july | good weather |
| New Iberia in july | good weather |
| Pecan Island in july | good weather |
| Opelousas in july | good weather |
| Marksville in july | good weather |
| Oakdale in july | good weather |
Click over cities on the map for information about the weather in july.
Grand Isle
perfect weather
good
tolerable
bad
very bad
Weather data for Grand Isle in july:
Weather data for Grand Isle for july are derived from an average of the weather forecast since 2009 in Grand Isle. There is a margin of error and these forecasts are to be considered as general information only. The weather in Grand Isle can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Grand Isle.