July weather forecast
Juana Díaz, PR

July's weather in Puerto Rico, USA, carries the heat of June forward. While the overall atmosphere stays humid and warm, rainfall reaches a level of 2.91 in, falling slightly from June's figures. The island experiences longer days, and the increase in sunshine creates an alluring backdrop for those seeking outdoor adventures. Despite July being one of the warmest months, the steady breeze provides a much-needed reprieve. The weather in August continues down a similar path with a minor rise in sea temperatures.

Temperature

Juana Díaz, Puerto Rico, starts July with an average high-temperature of a hot 86.2°F (30.1°C), hinting at a minimal fluctuation from June. Juana Díaz in July anticipates an average nighttime temperature of 75.9°F (24.4°C).

Heat index

July's heat index is computed to be a fiery hot 98.6°F (37°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a metric representing the sensation of warmth when air temperature and moisture come together. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.

Humidity

In July, the average relative humidity in Juana Díaz is 78%.

Rainfall

In Juana Díaz, in July, during 20.7 rainfall days, 2.91" (74mm) of precipitation is typically accumulated. Throughout the year, there are 249.1 rainfall days, and 28.82" (732mm) of precipitation is accumulated.

Ocean temperature

In Juana Díaz, in July, the average water temperature is 83.7°F (28.7°C).
Note: Temperatures between 77°F (25°C) and 84.2°F (29°C) in water are ideal for swimming, diving, and other activities, providing enjoyment and comfort for extended durations.

Daylight

In July, the average length of the day is 13h and 5min.
On the first day of the month, sunrise is at 5:54 am and sunset at 7:05 pm. On the last day of July, sunrise is at 6:04 am and sunset at 7:00 pm AST.

Sunshine

In July, the average sunshine is 9.8h.

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 threat to health from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 7 in July interprets into the following advice:
Stay clear of intense sun exposure. Solar protection is of utmost significance. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Caution! Sand and water reflections can notably increase the UV radiation intensity.