Puerto Rico precipitation in September

In Puerto Rico in September precipitation ranges from high in El Combate with 104 mm of rainfall to heavy in Humacao with 192 mm of rainfall. It is the wettest month of the year.

Where and how much does it rain in Puerto Rico in September?

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

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Legend heavy rainfall high moderate low almost none
Heavy rainfall has been defined as more than 160 mm precipitation. High: 90 mm to 160 mm. Moderate: 30 mm to 90 mm. Low: 5 mm to 30 mm.

  • How much rainfall does Puerto Rico receive in September?
  • In September, San Juan typically experiences high rainfall, averaging about 159 mm. This translates to a mix of wet and dry days throughout the month. Based on our climate, it is the month with the most precipitation throughout the year in San Juan.

  • What is the wettest city in September in Puerto Rico?
  • According to our data the wettest location is Humacao with an average precipitation of 192 mm.

  • What is the driest city in September in Puerto Rico?
  • Based on our records, El Combate registers the lowest average precipitation, with only 104 mm.

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