Puerto Rico weather

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Below are the temperatures expected today at popular destinations in Puerto Rico. Select a destination to compare today's forecast with average weather conditions.

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The weather guide for Puerto Rico shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by MeteoBlue. Find out more about our data sources.

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Which is the hottest month in Puerto Rico?

The hottest time of year in San Juan, Puerto Rico is normally September. Expect maximum daytime temperatures to reach 30°C with high heat and humidity.

Which month has the most rain in Puerto Rico?

In terms of rainfall, August is usually the wettest month in San Juan, Puerto Rico with 195mm on average. There are normally 20 days in August with some rain.

When is it sunniest in Puerto Rico?

The sunniest time of year in San Juan, Puerto Rico is normally March with bright sunshine on average for 75% of daylight hours; that's 9 hours of sunshine per day.

When is the sea warmest in Puerto Rico?

The sea is usually at its warmest in San Juan, Puerto Rico in September when the water temperature reaches 29°C.

Metric (°C / mm)  |  Imperial (°F / inches)

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Compare Puerto Rico weather with the USA

Below the Puerto Rico weather chart shows average maximum daytime temperature for Puerto Rico (San Juan) and the USA (Washington).

Maximum daytime temperature (°C)

Puerto Rico (San Juan)
USA (Washington)

Metric (°C / mm)  |  Imperial (°F / inches)

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Puerto Rico weather overview

This large, mountainous island lies between Hispaniola and the Leeward Islands and its topography and location, in the path of the northeast trade winds, gives it a rainier climate than is usual in the region. Unlike most other Caribbean islands, which have a single summer rainy season, Puerto Rico experiences downpours at any time of the year.

Its centre and north coast (site of the island's capital, San Juan) are particularly rainy. The south coast is more sheltered and therefore drier. Temperatures are high throughout the year in San Juan and humidity can make the heat sticky and unpleasant, although sea breezes help dispel this on the coast and the air is cooler and fresher in the mountains.

What to pack for Puerto Rico weather

Pack light clothes and rainwear with a warmer cover-up if you are planning a mountain visit.

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