Annual average weather for San Juan, Puerto Rico

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Annual Average Weather for San Juan, Puerto Rico

The annual average maximum daily temperature is 30.5°C (87.0°F) which is very hot and perfect for sunbathing on clear days. The annual average water temperature is typically 27.6°C (81.6°F) which is very warm and ideal for relaxing and swimming for the whole day. Annually there are on average 21.7 days of rain per month and 8.0 hours of sun per day.

When is the best time to visit San Juan?

The best months to visit San Juan are January, February, March, April, for the best beach weather, the most sunshine and optimal sunbathing and swimming conditions with the least chance of rain.

The sea is best for swimming between June and November when the sea temperature is above the average 28°C (82°F) which is very warm and ideal for relaxing and swimming for the whole day.

Can you sunbathe in San Juan year round?

Yes, you can sunbathe in San Juan all year round.

The coolest month in San Juan is January when the average maximum temperature is 28°C (83°F), average temperature is 25°C (78°F) and average minimum temperature is 22°C (72°F).

More info about the annual temperatures and sunshine.

Can you swim in San Juan year round?

Yes, you can swim in San Juan all year round.

The warmest sea water temperatures in San Juan are found in September when they peak at 29°C (84°F) and lowest in February when they dip to 26°C (79°F).

The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures

When is the hottest month in San Juan?

The hottest month in San Juan is September when the average maximum temperature is very hot and perfect for sunbathing on clear days 35°C (95°F), average temperature is 29°C (83°F) and average minimum temperature is 26°C (78°F).

More info about the annual temperatures and sunshine.

When is the coldest month in San Juan?

The coolest month in San Juan is January when the average maximum temperature is 28°C (83°F), average temperature is 25°C (78°F) and average minimum temperature is 22°C (72°F).

More info about the annual temperatures and sunshine

When is the sunniest month in San Juan?

The sunniest days in San Juan are in August which has the most hours of sunshine per day. In August the sunshine percentage is 71% making it sunny and pleasant most of the time. The hours of sunshine per day are 8.7hrs making the days long and bright.

More info about the annual sunshine.

When is the least sunny month in San Juan?

November has the least sunshine. In November the sunshine percentage is 61% making it sunny but overcast at times. The hours of sunshine per day are 7.3hrs making the days quite long and bright.

More info about the annual sunshine.

When is the driest month in San Juan?

The driest month in San Juan is February with 7cm (2.8inches) of rain and March has the fewest days of rain with 15.5 days with some rain, a wet time to visit the beach.

More info about the annual rainfall

When is the wettest month in San Juan?

The wettest month in San Juan is August with 22.6cm (8.9inches) of rain and December has the most days of rain with 25.3 days with some rain, a very wet time to visit the beach.

More info about the annual rainfall.

When is the sea the coldest in San Juan?

The coldest sea water temperatures in San Juan are found in February when they dip to 26°C (79°F) which is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures.

When is the sea the warmest in San Juan?

The warmest sea water temperatures in San Juan are found in September when they peak at 29°C (84°F) which is very warm and ideal for relaxing and swimming for the whole day.

More info about the annual sea temperatures.

When is the most humid month in San Juan?

The most humid month in San Juan is August with a dew point (an indicator of humidity) of 25°C (77°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

More info about the annual humidity.

When is the least humid month in San Juan?

The least humid month in San Juan is February with a dew point of 21°C (71°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.

More info about the annual humidity.

When is the windiest month in San Juan?

The most windy month in San Juan is July when the average maximum windspeed is 34KM/H (21MPH) and the average wind speed is 14KM/H (9MPH).

More info about the annual wind conditions.

Annual Temperature for San Juan

The hottest month in San Juan is September when the average maximum temperature is 35°C (95°F), average temperature is 29°C (83°F) and average minimum temperature is 26°C (78°F).

The coolest month in San Juan is January when the average maximum temperature is 28°C (28°F), average temperature is 25°C (78°F) and average minimum temperature is 22°C (72°F).

Annual Sunshine for San Juan

The longest days in San Juan are in June, with an average of 13.2 hours of daylight per day. December has the shortest days with an average of 11 hours of daylight per day.

The sunniest days in San Juan are in August which has the most hours of sunshine per day. The sunshine percentage is 71% making it sunny and pleasant most of the time. The hours of sunshine per day are 8.7hrs making the days long and bright.

November has the least sunshine. The sunshine percentage is 61% making it sunny but overcast at times. The hours of sunshine per day are 7.3hrs making the days quite long and bright.

The ultraviolet index is the highest in April when it reaches 13.6 and lowest in December when it reaches 7.5.

An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Annual Sea Temperature for San Juan

The warmest sea water temperatures in San Juan are found in September when they peak at 29°C (84°F) and lowest in February when they dip to 26°C (79°F).

The sea is excellent for swimming all year round as the water temperature is very warm and ideal for relaxing and swimming for the whole day.

Annual Rainfall for San Juan

The wettest month in San Juan is August with 22.6cm (8.9inches) of rain and December has the most days of rain with 25.3 days with some rain, a very wet time to visit the beach.

The driest month in San Juan is February with 7cm (2.8inches) of rain and March has the fewest days of rain with 15.5 days with some rain, a wet time to visit the beach.

Annual Humidity for San Juan

The most humid month in San Juan is August with a dew point (an indicator of humidity) of 25°C (77°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning.

The least humid month in San Juan is February with a dew point of 21°C (71°F) which is very humid and quite uncomfortable for most unless you are on a beach. At night you would most likely require a fan.

Annual Wind Speed for San Juan

The most windy month in San Juan is July when the average maximum windspeed is 34KM/H (21MPH) and the average wind speed is 14KM/H (9MPH).

The least windy month in San Juan is October when the average maximum windspeed is 28KM/H (17MPH) and the average wind speed is 9KM/H (5MPH).

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