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

In Grand Isle, the average high-temperature in June slightly increases from 80.1°F (26.7°C) in May to a still moderately hot 85.5°F (29.7°C). Throughout June, a modest shift from daytime highs is anticipated, with an average low-temperature of 79.7°F (26.5°C).

Heat index

During June, the heat index is appraised at a fiery hot 95°F (35°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.
It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Direct exposure to sunlight could raise the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. The individual's temperature perception can be influenced by numerous factors such as metabolic variations, physical activity, and clothing. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.
The innate cooling system of the human body revolves around perspiration, with the evaporation of sweat being central to this process. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. As the body accumulates more heat than it can release, body temperature goes up, increasing the risk of heat-related health issues.

Humidity

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, the average seawater temperature in June is 84.4°F (29.1°C).
Note: Surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as excellent and extremely agreeable for enduring enjoyment in water activities.

Daylight

The month with the longest days 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 health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In June, the maximum UV index of 7 translates into these guidelines:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The hours from 10 a.m. to 4 p.m. have the most intense UV radiation. As much as possible, limit direct sun exposure during this period. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Notice! Sand and water reflections contribute to a stronger UV exposure.