June weather forecast
Grand Isle, LA

June witnesses a gentle surge in the heat, with the temperature in Grand Isle scaling a high of 85.5°F (29.7°C), cozying up to the full-blown summer conditions. The confluence of longest daylight hours and the highest sunshine hours indicates the summer solstice's arrival. Following the temperature trends, the sea also warms up, inviting visitors for a refreshing plunge. However, an upswing in the frequency of rainfall days is also noticeable, painting a picture of wet summer days. Despite frequent rainy spells, the predictable Grand Isle weather in June appeals to visitors who welcome the classic summer feel.

Temperature

June's arrival signals a subtle increase in average high-temperatures, moving from May's warm 80.1°F (26.7°C) to a still moderately hot 85.5°F (29.7°C). Throughout June, Grand Isle reports a steady low-temperature average of 79.7°F (26.5°C), slightly lower than its daytime counterpart.

Heat index

During June, the heat index is appraised at a fiery hot 95°F (35°C). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Remember that heat index calculations are made for conditions in the shade with light wind. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'feels like', is a numerical representation of warmth when taking temperature and moisture levels into account. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
In the face of high temperatures, the human body's reflex is to perspire, leveraging sweat evaporation for cooling. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In Grand Isle, the average relative humidity in June is 74%.

Rainfall

In Grand Isle, in June, it is raining for 15.4 days, with typically 2.13" (54mm) of accumulated precipitation. In Grand Isle, during the entire year, the rain falls for 151.9 days and collects up to 22.01" (559mm) of precipitation.

Snowfall

In Grand Isle, snow does not fall in February through December.

Ocean temperature

In Grand Isle, in June, the average water temperature is 84.4°F (29.1°C).
Note: Water temperature ranging between 77°F (25°C) and 84.2°F (29°C) is considered very warm and pleasing for everyone. It allows for enjoyable water activities over extended periods without discomfort.

Daylight

The month with the longest days in Grand Isle is June, with an average of 14h and 0min of daylight.
On the first day of the month, sunrise is at 6:00 am and sunset at 7:55 pm. On the last day of June, sunrise is at 6:04 am and sunset at 8:03 pm CDT.

Sunshine

With an average of 11h of sunshine, June has the most sunshine of the year.

UV index

May through September, with an average maximum UV index of 7, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 7 during June translates into the following guidance:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Avoid direct Sun exposure and stay in the shade between 10 a.m. and 4 p.m., a time when UV radiation is most intense, noting that not all shade structures offer full protection. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Heads up! UV intensity is amplified by reflections from water and sand.