May weather forecast
Toa Alta, PR

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Weather in May

May in Toa Alta greets residents with the beginning of the hot season, characterized by a noticeable increase in average temperatures. The surge in humidity levels enhances the tropical feel, making it a perfect time for water-related activities. The wind loses a touch of its chill, maintaining an appropriate balance with the rising mercury. The strengthening sunshine dominates the sky, sparking off extended daylight hours. Uniquely, May experiences the highest rainfall at 3.43" (87mm), providing the necessary relief from the heat.

Temperature

A minor adjustment in Toa Alta's average high-temperature is noted with the start of May, touching a still moderately hot 82.6°F (28.1°C) from April's 81.1°F (27.3°C). Toa Alta documents an average low-temperature of 75.7°F (24.3°C) for the nights of May.

Heat index

May's average heat index is computed to be a hot 89.6°F (32°C). Staying active during long-term exposure might result in a state of exhaustion and cause heat cramps.
The heat index's values are generally associated with conditions in shade and light breezes. Exposure to the direct sun might augment heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. A person's impression of weather can be affected by numerous aspects, among them metabolic variations, pregnancy, and activity levels. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. In general, younger individuals are at greater risk than adults because they tend to sweat less. Also, having a larger skin surface to body size ratio and greater heat production due to their active behavior contribute to this danger.

Humidity

May through July and November, with an average relative humidity of 79%, are the most humid months in Toa Alta, Puerto Rico.

Rainfall

In Toa Alta, in May, during 22.7 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. In Toa Alta, during the entire year, the rain falls for 223.5 days and collects up to 27.95" (710mm) of precipitation.

Daylight

In Toa Alta, Puerto Rico, the average length of the day in May is 13h and 0min.
On the first day of the month, sunrise is at 5:57 am and sunset at 6:46 pm. On the last day of May, sunrise is at 5:47 am and sunset at 6:57 pm AST.

Sunshine

The months with the most sunshine in Toa Alta are May and June, with an average of 10.8h of sunshine.

UV index

The months with the highest UV index in Toa Alta, Puerto Rico, are May through November, with an average maximum UV index of 7. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum daily UV index of 7 during May morphs into the following directions:
Deflect overexposure. Sun protection is a necessity. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. During bright days, sunglasses that offer UVA and UVB defense are recommended.
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Frequently asked questions

How hot is it in Toa Alta in May?

The high-temperature during May is 82.6°F (28.1°C) and the low-temperature is 75.7°F (24.3°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines relative humidity and air temperature, in May is computed to be 89.6°F (32°C).

What are the most humid months in Toa Alta?

May through July and November, with an average relative humidity of 79%, are most humid months in Toa Alta, Puerto Rico.

What is the average humidity in May in Toa Alta?

In Toa Alta, the average relative humidity in May is 79%.

How many days does it rain in May in Toa Alta?

In May, the rain falls for 22.7 days. Throughout May, 3.43" (87mm) of precipitation is accumulated.

What is the average length of the day in May in Toa Alta?

In Toa Alta, Puerto Rico, the average day length in May is 13h and 0min.

What time are sunrise and sunset in May in Toa Alta?

In May, on the first day of the month, sunrise is at 5:57 am and sunset at 6:46 pm. On the last day of the month, in Toa Alta, Puerto Rico, sunrise is at 5:47 am and sunset at 6:57 pm AST.

What is the month with the most sunshine in Toa Alta?

The months with the most sunshine in Toa Alta, Puerto Rico, are May and June, with an average of 10.8h of sunshine.

How long on average sun shines in May in Toa Alta?

In May, the average sunshine duration is 10.8h.

What are the months with the highest UV index in Toa Alta?

The months with the highest UV index in Toa Alta, Puerto Rico, are May through November, with an average maximum UV index of 7.

What is the UV index reading in May in Toa Alta?

In May, the average daily maximum UV index in Toa Alta, Puerto Rico, is 7. A UV Index reading of 6 to 7 represents a high health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Toa Alta, PR

Average temperature in May - Toa Alta, PR
  • Average high temperature in May: 82.6°F

The warmest month (with the highest average high temperature) is August (85.5°F).
The month with the lowest average high temperature is January (79.9°F).

  • Average low temperature in May: 75.7°F

The months with the highest average low temperature are August, September and October (78.4°F).
The coldest month (with the lowest average low temperature) is March (73°F).

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Average pressure in May
Toa Alta, PR

Average pressure in May - Toa Alta, PR
  • Average pressure in May: 29.98"Hg

The months with the highest atmospheric pressure are January and February (30.02"Hg).
The month with the lowest atmospheric pressure is October (29.9"Hg).

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Average wind speed in May
Toa Alta, PR

Average wind speed in May - Toa Alta, PR
  • Average wind speed in May: 8.4mph

The windiest month (with the highest average wind speed) is July (10mph).
The calmest month (with the lowest average wind speed) is October (6.8mph).

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Average humidity in May
Toa Alta, PR

Average humidity in May - Toa Alta, PR
  • Average humidity in May: 79%

The months with the highest relative humidity are May, June, July and November (79%).
The month with the lowest relative humidity is March (76%).

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Average rainfall in May
Toa Alta, PR

Average rainfall in May - Toa Alta, PR
  • Average rainfall in May: 3.43"

The wettest month (with the highest rainfall) is October (3.82").
The driest month (with the least rainfall) is February (0.94").

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Average rainfall days in May
Toa Alta, PR

Average rainfall days in May - Toa Alta, PR
  • Average rainfall days in May: 22.7 days

The month with the highest number of rainy days is October (24 days).
The months with the least rainy days are January and February (14.2 days).

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Average daylight in May /
Average sunshine in May
Toa Alta, PR

Average daylight in May / Average sunshine in May - Toa Alta, 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 0min).

  • Average sunshine in May: 10h and 5min

The months with the most sunshine are May and June (Average sunshine: 10h and 48min).
The month with the least sunshine is November (Average sunshine: 6h and 42min).

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Average sunshine days in May
Toa Alta, PR

Average sunshine days in May - Toa Alta, PR
  • Average sunshine days in May: 5 days

The month with the most sunshine days is January (9.8 days).
The months with the least sunshine days are October and November (3.5 days).

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Average UV index in May
Toa Alta, PR

Average UV index in May - Toa Alta, PR
  • Average UV index in May: 7

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

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Average cloud cover in May
Toa Alta, PR

Average cloud cover in May - Toa Alta, PR
  • Average cloud cover in May: 34

The months with the most cloud cover are May, July and November (Cloud cover 34).
The month with the least cloud cover is September (Cloud cover 26).

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Average visibility in May
Toa Alta, PR

Average visibility in May - Toa Alta, 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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Toa Alta, Puerto Rico, USA

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