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Puerto Rico temperatures in September

September is generally a very warm month with maximum daytime temperatures around 31°C (88°F) and nighttime temperatures around 25°C (77°F) in San Juan.

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

Find the average daytime temperatures in September for the most popular destinations in Puerto Rico on the map below. Click on a destination dot for more detailed information.

Weather conditions Weather
Temperatures
Precipitation
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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30ºC (86ºF). Warm: 22ºC (72ºF) to 30ºC (86ºF). Pleasant: 18ºC (64ºF) to 22ºC (72ºF) Moderate: 12ºC (54ºF) to 18ºC (64ºF). Cold: 2ºC (36ºF) to 12ºC (54ºF). Very cold: lower than 2ºC (36ºF)

  • How much sun does Puerto Rico get in September?
    • September is generally a sunny month with an average of 236 hours of sunshine in San Juan during the whole month.

  • How warm is the water in September?
    • The water temperature averages approximately 29°C (84°F) in San Juan this month, an ideal temperature for swimming.

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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.

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