June weather forecast and climate
San Juan, PR

An old fort building and a view of the stunning San Juan city, Puerto Rico
An old fort building and a view of the stunning San Juan city, Puerto Rico

Weather in June

June, the first month of the summer, in San Juan, is still a warm month, with average temperature varying between 78.3°F (25.7°C) and 84.2°F (29°C).

Temperature

In June, the average high-temperature is relatively the same as in May - a still warm 84.2°F (29°C). In San Juan, Puerto Rico, in June, the average low-temperature is 78.3°F (25.7°C).

Heat index

The average heat index is appraised at a tropical 94.1°F (34.5°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'feels like', 'felt air temperature', or 'apparent temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (clothing, differences in body mass, height, and shape, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

Months with the highest humidity in San Juan, Puerto Rico, are May through July, with an average relative humidity of 79%.

Rainfall

In June, in San Juan, the rain falls for 10.3 days. Throughout June, 0.71" (18mm) of precipitation is accumulated. In San Juan, during the entire year, the rain falls for 159.9 days and collects up to 12.01" (305mm) of precipitation.

Ocean temperature

In San Juan, the average water temperature is 82.9°F (28.3°C).
Note: For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

June has the longest days of the year in San Juan, with an average of 13.2h of daylight.

Sunshine

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

UV index

Months with the highest UV index are April through November, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The average daily UV index of 7 transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.
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FAQ

What is the temperature in June in San Juan?

In June, the average high-temperature is 84.2°F (29°C), and the average low-temperature is 78.3°F (25.7°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that combines air temperature and relative humidity, in June is evaluated at 94.1°F (34.5°C).

What is the most humid month in San Juan?

May through July, with an average relative humidity of 79%, are most humid months.

What is the average humidity in June in San Juan?

In San Juan, the average relative humidity in June is 79%.

How much does it rain in San Juan in June?

In San Juan, in June, it is raining for 10.3 days, with typically 0.71" (18mm) of accumulated precipitation.

What is the water temperature in June in San Juan?

In San Juan, Puerto Rico, in June, the average water temperature is 82.9°F (28.3°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

When are the longest days in San Juan?

The month with the longest days in San Juan is June, with an average of 13.2h of daylight.

How many hours of daylight does San Juan have in June?

In June, the average length of the day is 13.2h.

What month has the most sunshine in San Juan?

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

How long on average sun shines in June in San Juan?

The average sunshine in June is 10.9h.

What are the months with the highest UV index in San Juan?

Months with the highest UV index in San Juan are April through November, with an average maximum UV index of 7.

What is the UV index reading in June in San Juan?

The average daily maximum UV index in June in San Juan is 7. A UV Index reading of 6 to 7 represents a high hazard to health from the exposure to the Sun's UV radiation.

Average temperature in June
San Juan, PR

Average temperature in June - San Juan, PR
  • Average high temperature in June: 84.2°F

The warmest month (with the highest average high temperature) is August (85.1°F).
Months with the lowest average high temperature are January and March (79.9°F).

  • Average low temperature in June: 78.3°F

Months with the highest average low temperature are August, September and October (79.2°F).
The coldest month (with the lowest average low temperature) is March (73.9°F).

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Average pressure in June
San Juan, PR

Average pressure in June - San Juan, PR
  • Average pressure in June: 30.01"

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

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Average wind speed in June
San Juan, PR

Average wind speed in June - San Juan, PR
  • Average wind speed in June: 9.6mph

The windiest month (with the highest average wind speed) is July (10.7mph).
The calmest month (with the lowest average wind speed) is October (7.4mph).

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Average humidity in June
San Juan, PR

Average humidity in June - San Juan, PR
  • Average humidity in June: 79%

Months with the highest relative humidity are May, June and July (79%).
Months with the lowest relative humidity are February and March (76%).

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Average rainfall in June
San Juan, PR

Average rainfall in June - San Juan, PR
  • Average rainfall in June: 0.71"

The wettest month (with the highest rainfall) is November (1.57").
The driest month (with the least rainfall) is April (0.55").

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Average rainfall days in June
San Juan, PR

Average rainfall days in June - San Juan, PR
  • Average rainfall days in June: 10.3 days

The month with the highest number of rainy days is November (16.1 days).
The month with the least rainy days is June (10.3 days).

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Average sea temperature in June
San Juan, PR

Average sea temperature in June - San Juan, PR
  • Average sea temperature in June: 82.8°F

The best month for swimming (with the highest average sea temperature) is September (84.9°F).
The coldest month (with the lowest average sea temperature) is February (78.9°F).

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Average daylight in June /
Average sunshine in June
San Juan, PR

Average daylight in June / Average sunshine in June - San Juan, PR
  • Average daylight in June: 13.2h

The month with the longest days is June (Average daylight: 13.2h).
The month with the shortest days is December (Average daylight: 11h).

  • Average sunshine in June: 10.9h

The month with the most sunshine is June (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 6.6h).

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Average sunshine days in June
San Juan, PR

Average sunshine days in June - San Juan, PR
  • Average sunshine days in June: 13.7 days

The month with the most sunshine days is June (13.7 days).
The month with the least sunshine days is November (9.4 days).

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Average UV index in June
San Juan, PR

Average UV index in June - San Juan, PR
  • Average UV index in June: 7

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

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Average cloud cover in June
San Juan, PR

Average cloud cover in June - San Juan, PR
  • Average cloud cover in June: 32

The month with the most cloud cover is December (Cloud cover 35).
The month with the least cloud cover is September (Cloud cover 26).

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Average visibility in June
San Juan, PR

Average visibility in June - San Juan, PR
  • Average visibility in June: 6mi

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

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