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Puerto Rico temperatures in September

Puerto Rico in September has maximum daytime temperatures ranging from high in Maunabo with 28°C (83°F) to very high temperatures in Vieques with 32°C (89°F). Nighttime temperatures generally drop to 24°C (74°F) in Vieques and 26°C (79°F) in Maunabo.

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
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)

  • What is the warmest city in September in Puerto Rico?
    • Vieques tops the warmest city list in our database with average maximum daytime temperatures around 32°C (89°F) and a minimum nighttime temperature of around 24°C (74°F).

  • What is the coldest city in September in Puerto Rico?
    • The coldest city in September in Puerto Rico is Maunabo when we check our database. The maximum daytime temperatures are around 28°C (83°F) and minimum nighttime temperatures fall around 26°C (79°F).

  • 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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