September Rainfall and Precipitation in Puerto Rico

Monthly rainfall totals, rainy days and the driest cities across Puerto Rico in September.

Puerto Rico experiences precipitation in September ranging from high in El Combate (104 mm (4.1 in)) to heavy in Humacao (192 mm (7.6 in)). On average, September is the wettest month of the year in Puerto Rico.

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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.

See also: the Puerto Rico weather by month.

Best Places to Visit in Puerto Rico in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Puerto Rico.

Conditions Temperatures Precipitation
Monthly precipitation 0 mm (0 in) dry → 150 mm (5.9 in) wet

Marker color shows total monthly precipitation in September: pale blue is dry, deep blue is wet.

Puerto Rico precipitation in September: frequently asked questions

How much rainfall does Puerto Rico receive in September?

In September, San Juan typically receives significant rainfall, averaging around 159 mm (6.3 in). Expect a mix of wet and dry days with occasional showers.

How many days does it rain in Puerto Rico in September?

Expect around 18 days rainy days in San Juan during September.

Is September part of the rainy season in Puerto Rico?

September is generally a drier month for Puerto Rico, falling outside the main rainy season.

What is the wettest city in September in Puerto Rico?

Based on our records, Humacao receives the most rainfall in Puerto Rico in September, averaging about 192 mm (7.6 in).

What is the driest city in September in Puerto Rico?

Based on our database, El Combate sees the least rainfall in Puerto Rico in September, with around 104 mm (4.1 in) on average.

Interested in more climate information?

We have much more information about the climate in Puerto Rico.

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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