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September Rainfall Precipitation in Puerto Rico

Puerto Rico experiences precipitation in September ranging from high in El Combate (104 mm) to heavy in Humacao (192 mm). On average, September is the wettest month of the year in Puerto Rico.

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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.

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For a detailed overview over the year and the best time to visit Puerto Rico, check out our Puerto Rico's climate page.

  • 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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