June weather forecast
Juana Díaz, PR

June heralds the advent of summer in Puerto Rico, USA, with an overall increase in temperatures. The median sea temperature elevates to a pleasant 83.2°F (28.4°C), providing ideal conditions for those looking to indulge in water sports. This month, while slightly less rainy than May, still sees substantial precipitation. As the peak travel season arrives, the weather turns sultry with a persistent, warm breeze flowing across the island. Moving into July, humidity and high temperatures remain consistent.

Temperature

The average high-temperature during June registers at a still warm 85.5°F (29.7°C), maintaining a close resemblance to the previous month. During June, Juana Díaz observes a consistent average nighttime temperature of 75.7°F (24.3°C).

Heat index

The heat index in June is computed to be a very hot 96.8°F (36°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
The standards for the heat index are set for locations in shade and under light breezes. If directly exposed to the sun, the heat index could rise by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
The evaporation of sweat is a natural cooling mechanism of the human body, facilitated by perspiration. In the presence of high relative humidity, the evaporation rate diminishes, resulting in the body retaining more warmth compared to dry conditions. Exceeding the body's heat disposal threshold results in a rise in body temperature and potential thermal disorders.

Humidity

In June, the average relative humidity is 78%.

Rainfall

In Juana Díaz, during June, the rain falls for 19.3 days and regularly aggregates up to 2.13" (54mm) of precipitation. In Juana Díaz, Puerto Rico, during the entire year, the rain falls for 249.1 days and collects up to 28.82" (732mm) of precipitation.

Ocean temperature

In June, the average ocean temperature is 83.1°F (28.4°C).
Note: Water temperatures between 77°F (25°C) and 84.2°F (29°C) are regarded as very warm, ensuring all water activities are pleasurable for extended periods without feeling uneasy.

Daylight

The month with the longest days is June, with an average of 13h and 12min of daylight.
On the first day of the month, sunrise is at 5:49 am and sunset at 6:58 pm. On the last day of June, sunrise is at 5:53 am and sunset at 7:05 pm AST.

Sunshine

June has the most sunshine of the year, with an average of 10.9h of sunshine.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: A daily maximum UV index of 7 in June translates into the following instructions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.