June weather forecast
Port Royal, Jamaica

June welcomes the summer season in Port Royal with temperature highs reaching 30°C (86°F), making it one of the hottest times of the year. Sea temperatures remain congenial and comforting despite the increase in the heat. Wind speeds also show an uptick, reaching 12.8km/h (8mph), complementing the tropical summer atmosphere. Rainfall persists at substantial levels, while the amount of sunshine per day starts to decline marginally. Despite the rainfall, the sun's warm and persistent glow, accompanied by the gentle sea breeze, makes the weather quite enjoyable.

Temperature

Port Royal's average high-temperature in June is a still warm 29.3°C (84.7°F), marking an insignificant difference from the 28.7°C (83.7°F) of May. The mean low-temperature during June nights is a still warm 24°C (75.2°F).

Heat index

The heat index value during June is appraised at a torrid 36°C (96.8°F). Implement additional safety measures to avoid heat cramps and heat exhaustion. Persistent activity might trigger heatstroke.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', measures the perceived warmth when incorporating the humidity present in the air. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Evaporating sweat, an outcome of perspiration, is key in assisting the human body to moderate its temperature. Under high air temperature and high humidity (high heat index) conditions, the body's ability to perspire is compromised, increasing the sensation of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.

Humidity

In June, the average relative humidity is 81%.

Rainfall

In June, the rain falls for 26.1 days. Throughout June, 122mm (4.8") of precipitation is accumulated. Throughout the year, in Port Royal, there are 310.9 rainfall days, and 1286mm (50.63") of precipitation is accumulated.

Sea temperature

In June, the average sea temperature is 28.4°C (83.1°F).
Note: Water temperatures in the range of 25°C (77°F) to 29°C (84.2°F) are warm and delightful, ensuring comfort during water activities over extended periods.

Daylight

June has the longest days of the year, with an average of 13h and 12min of daylight.
On the first day of June in Port Royal, sunrise is at 05:31 and sunset at 18:39. On the last day of the month, sunrise is at 05:35 and sunset at 18:46 EST.

Sunshine

In June, the average sunshine is 9.7h.

UV index

The months with the highest UV index are June through October, with an average maximum UV index of 7. A UV Index estimate of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for the average person.
Note: In June, the average maximum UV index of 7 translates into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. Experience reduced UV exposure by about half when donning a wide-brim hat. Stay vigilant! UV rays get a boost in intensity due to sand and water reflections.