May weather forecast
Juana Díaz, PR

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Weather in May

The month of May in Puerto Rico, USA, is characterized by a mild uptick in temperatures and increased rainfall. At 2.95 in, rainfall reaches its peak for the first half of the year, which contributes to the enhanced lushness of the landscape. With more sunlight hours compared to April, outdoor activities continue to be popular among residents and visitors alike. Sea temperatures also rise, luring beach enthusiasts to the country's palm-fringed shores. Heading into June, expect humid conditions to persist but with slightly reduced rainfall.

Temperature

May commences in Juana Díaz with an average high-temperature of a still moderately hot 84.4°F (29.1°C), showing little deviation from April's 82.8°F (28.2°C). Juana Díaz's nights in May cool down to an average low-temperature of 74.1°F (23.4°C).

Heat index

May's mean heat index is estimated at a very hot 95°F (35°C). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'felt air temperature' or 'feels like', measures the perceived warmth when incorporating the humidity present in the air. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
To achieve cooling, the human body employs perspiration, relying on the subsequent evaporation of sweat. Under conditions of increased relative humidity, the evaporation rate lessens, causing the body to retain more heat than under less humid conditions. Heat-related challenges, like dehydration, can be anticipated when body heat isn't managed effectively.

Humidity

In May, the average relative humidity is 79%.

Rainfall

In Juana Díaz, in May, it is raining for 24.6 days, with typically 2.95" (75mm) of accumulated precipitation. Throughout the year, in Juana Díaz, there are 249.1 rainfall days, and 28.82" (732mm) of precipitation is accumulated.

Ocean temperature

In May, the average ocean temperature is 82°F (27.8°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

In Juana Díaz, Puerto Rico, the average length of the day in May is 12h and 59min.
On the first day of the month, sunrise is at 5:58 am and sunset at 6:47 pm. On the last day of May, sunrise is at 5:49 am and sunset at 6:58 pm AST.

Sunshine

The average sunshine in May in Juana Díaz is 10.4h.

UV index

May through October, with an average maximum UV index of 7, are months with the highest UV index in Juana Díaz. A UV Index estimate of 6 to 7 represents a high health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: The maximum UV index, 7 during May, leads to the following recommendations:
Implement precautions and maintain sun safety methods. Avoidance of sunburn is demanded. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be mindful! Sand and water reflections can up the Sun's UV exposure.
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Frequently asked questions

Is it hot in Juana Díaz during May?

In Juana Díaz, 84.4°F (29.1°C) is the average high-temperature and 74.1°F (23.4°C) is the average low-temperature during May. In May, the average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, is estimated at 95°F (35°C).

What is the average humidity in May in Juana Díaz?

In Juana Díaz, Puerto Rico, the average relative humidity in May is 79%.

How much does it rain in Juana Díaz in May?

In Juana Díaz, Puerto Rico, in May, during 24.6 rainfall days, 2.95" (75mm) of precipitation is typically accumulated.

What is the water temperature in May in Juana Díaz?

In May, the average ocean temperature in Juana Díaz, Puerto Rico, is 82°F (27.8°C). Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Juana Díaz have in May?

The average day length in May in Juana Díaz, Puerto Rico, is 12h and 59min.

When is the sunrise / sunset in May in Juana Díaz?

In May, on the first day of the month, sunrise is at 5:58 am and sunset at 6:47 pm. On the last day of the month, in Juana Díaz, sunrise is at 5:49 am and sunset at 6:58 pm AST.

How long on average sun shines in May in Juana Díaz?

The average sunshine duration in May in Juana Díaz, Puerto Rico, is 10.4h.

What are the months with the highest UV index in Juana Díaz?

May through October, with an average maximum UV index of 7, are months with the highest UV index in Juana Díaz.

What is the UV index reading in May in Juana Díaz?

In May, the average daily maximum UV index is 7. A UV Index reading of 6 to 7 represents a high health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Juana Díaz, PR

Average temperature in May - Juana Díaz, PR
  • Average high temperature in May: 84.4°F

The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is January (81°F).

  • Average low temperature in May: 74.1°F

The month with the highest average low temperature is August (76.6°F).
The coldest months (with the lowest average low temperature) are February and March (70.9°F).

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Average pressure in May
Juana Díaz, PR

Average pressure in May - Juana Díaz, PR
  • Average pressure in May: 29.98"Hg

The months with the highest atmospheric pressure are January and February (30.01"Hg).
The months with the lowest atmospheric pressure are October and November (29.9"Hg).

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Average wind speed in May
Juana Díaz, PR

Average wind speed in May - Juana Díaz, PR
  • Average wind speed in May: 7mph

The windiest month (with the highest average wind speed) is July (8mph).
The calmest month (with the lowest average wind speed) is November (5.5mph).

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Average humidity in May
Juana Díaz, PR

Average humidity in May - Juana Díaz, PR
  • Average humidity in May: 79%

The month with the highest relative humidity is November (81%).
The month with the lowest relative humidity is March (76%).

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Average rainfall in May
Juana Díaz, PR

Average rainfall in May - Juana Díaz, PR
  • Average rainfall in May: 2.95"

The wettest month (with the highest rainfall) is September (4.45").
The driest month (with the least rainfall) is February (0.83").

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Average rainfall days in May
Juana Díaz, PR

Average rainfall days in May - Juana Díaz, PR
  • Average rainfall days in May: 24.6 days

The month with the highest number of rainy days is October (24.8 days).
The month with the least rainy days is February (15 days).

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Average sea temperature in May
Juana Díaz, PR

Average sea temperature in May - Juana Díaz, PR
  • Average sea temperature in May: 82°F

The best month for swimming (with the highest average sea temperature) is September (85.3°F).
The coldest month (with the lowest average sea temperature) is March (79.3°F).

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Average daylight in May /
Average sunshine in May
Juana Díaz, PR

Average daylight in May / Average sunshine in May - Juana Díaz, PR
  • Average daylight in May: 13h and 0min

The month with the longest days is June (Average daylight: 13h and 12min).
The month with the shortest days is December (Average daylight: 11h and 6min).

  • Average sunshine in May: 10h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is November (Average sunshine: 6h and 54min).

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Average sunshine days in May
Juana Díaz, PR

Average sunshine days in May - Juana Díaz, PR
  • Average sunshine days in May: 2.7 days

The month with the most sunshine days is March (7.6 days).
The month with the least sunshine days is October (2.6 days).

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Average UV index in May
Juana Díaz, PR

Average UV index in May - Juana Díaz, PR
  • Average UV index in May: 7

The months with the highest UV index are May, June, July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, November and December (UV index 6).

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Average cloud cover in May
Juana Díaz, PR

Average cloud cover in May - Juana Díaz, PR
  • Average cloud cover in May: 34

The month with the most cloud cover is May (Cloud cover 34).
The month with the least cloud cover is February (Cloud cover 25).

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Average visibility in May
Juana Díaz, PR

Average visibility in May - Juana Díaz, PR
  • Average visibility in May: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Juana Díaz, Puerto Rico, USA

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