The highest day temperature in June 2025 was 90°F. The lowest night temperature was 82°F. The average values for day and night temperatures during June were 87.5°F и 85.8°F respectivly.

The average sea surface temperature in June 2025 for Grand Isle was 90.3°F. The maximum and minimum values were 87.2°F and 93.4°F respectively.

Most of the days in June are cloudy but you can also expect sunny or gloomy days.

Precipitation total in June for Grand Isle is 2.0 in. It makes june one of the most rainy months of the year.

The average wind speed in June is 10.6 mph. It makes June one of the most windless months of the year for Grand Isle.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Grand Isle in June is 8.0 hours.