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Temperatures in September
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Temperature in Puerto Rico in September

September is generally a very warm month with maximum daytime temperatures around 31°C and nighttime temperatures around 25°C in San Juan.

What is the temperature of the different cities in Puerto Rico in September?

Explore the map below to discover average September temperatures at the top destinations in Puerto Rico. For a deeper dive, simply click on any destination dot.

Weather conditions Weather
Temperatures
Precipitation
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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • How much sun does Puerto Rico get in September?
    • San Juan enjoys close to 236 hours of sunlight. This not only brightens the days but also uplifts the atmosphere during the month.

  • What is the water's temperature in September?
    • The water temperature averages approximately 29°C in San Juan this month, which is a bit warm water for swimming. For many people, water temperatures around 29°C might feel quite warm. Especially when compared to average swimming pool temperatures which are typically between 25°C and 28°C.

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    • Weather and climate has detailed information for every country in the world. Are you going to Puerto Rico? Get detailed historical weather averages for many cities in Puerto Rico.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.