Grand Isle Weather: May
 |
Average Day Temperature: | 81.4°F |
|
Average Night Temperature: | 78.8°F |
|
Sea Water Temperature: | 83.1°F |
|
Number of Sunny Days: | 12 days |
| Sunshine Hours: | 13.3 - 13.9 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.9 in | |
| detailed information | ||
forecast
| Grand Isle |
Temperature
| Grand Isle |
Air Temperature in May, °F
The highest day temperature in May 2026 was 84°F. The lowest night temperature was 66°F. The average values for day and night temperatures during May were 79.9°F и 79.4°F respectivly.
Grand Isle Water Sea Temperature in May, °F
The average sea surface temperature in May 2026 for Grand Isle was 82.7°F. The maximum and minimum values were 77.2°F and 89.6°F respectively.
You can expect various weather conditions during May. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in May, in
Precipitation total in May for Grand Isle is 1.9 in. It makes may one of the most rainy months of the year.
The average wind speed in May is 11.6 mph.
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 May is 8.1 hours.
Grand Isle on the Weather Map
| Boston |  |
+96 |
| Chicago | |
+84 |
| Hawaii |  |
+82 |
| Houston |  |
+82 |
| Las Vegas | |
+118 |
| Los Angeles | |
+100 |
| Maui | |
+78 |
| Miami | |
+96 |
| Myrtle Beach | |
+90 |
| New York | |
+104 |
| San Diego | |
+94 |
| San Francisco | |
+82 |
| Santa Monica | |
+82 |
| Sarasota | |
+96 |
| Tampa | |
+98 |
| 1800 |  |
90°F | N 11 mph |
| 2100 |  |
90°F | S 14 mph |
| 0000 | |
90°F | W 4 mph |
| 0300 |  |
86°F | N 9 mph |
| 0600 | |
88°F | N 10 mph |
| 0900 |  |
88°F | N 5 mph |
| 1200 | |
88°F | NW 7 mph |
| 1500 | |
90°F | N 9 mph |