Weather in September in Puerto Rico

Many people wonder what the weather conditions are in September in Puerto Rico. Is this month a good time to go to Puerto Rico? To answer that question we created this page with all the information you need.

What is the weather like in Puerto Rico in September?

The weather in Puerto Rico in September is generally tolerable.

You can expect very warm maximum average daytime temperatures around 31°C (88°F) and nighttime temperatures around 24°C (75°F) in San Juan. On average, this month is one of the warmest months of the year in Puerto Rico. So be prepared and make sure to dress lightly.

Precipitation in September ranges from high in San Juan with an average of 134mm (5.3inch) rainfall to heavy in Mayaguez with 167mm (6.6inch). It is also generally a sunny month with an average of 235 hours of sunshine in San Juan during the whole month.

We invite you to have a look at the map below to find out more about the different weather conditions per location in Puerto Rico.

Where to go in Puerto Rico in September

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

Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inch a month).

Popular destinations in Puerto Rico

What is the weather like in September for the 5 most popular destinations in Puerto Rico?

Average weather in San Juan

In September San Juan generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 24°C (75°F) and high monthly rainfall. So on average the conditions are tolerable that month.

San Juan
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
31°C / 88°F 
24°C / 75°F 
268 hours 
135mm / 5.3inch 
19 days 
31°C / 88°F 
24°C / 75°F 
235 hours 
134mm / 5.3inch 
18 days 
October   >> October
>>  
31°C / 88°F 
24°C / 75°F 
227 hours 
145mm / 5.7inch 
17 days 
Climate in San Juan

Average weather in Rincon

In September Rincon generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 23°C (73°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

Rincon
Max temperature Max temp
Min temperature Min temp
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
32°C / 90°F 
23°C / 73°F 
177mm / 7inch 
15 days 
32°C / 90°F 
23°C / 73°F 
167mm / 6.6inch 
15 days 
October   >> October
>>  
32°C / 90°F 
23°C / 73°F 
163mm / 6.4inch 
14 days 
Climate in Rincon

Average weather in Vieques

In September Vieques generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 24°C (75°F) and high monthly rainfall. So on average the conditions are tolerable that month.

Vieques
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
31°C / 88°F 
24°C / 75°F 
268 hours 
135mm / 5.3inch 
19 days 
31°C / 88°F 
24°C / 75°F 
235 hours 
134mm / 5.3inch 
18 days 
October   >> October
>>  
31°C / 88°F 
24°C / 75°F 
227 hours 
145mm / 5.7inch 
17 days 
Climate in Vieques

Average weather in Culebra

In September Culebra generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 24°C (75°F) and high monthly rainfall. So on average the conditions are tolerable that month.

Culebra
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
31°C / 88°F 
24°C / 75°F 
268 hours 
135mm / 5.3inch 
19 days 
31°C / 88°F 
24°C / 75°F 
235 hours 
134mm / 5.3inch 
18 days 
October   >> October
>>  
31°C / 88°F 
24°C / 75°F 
227 hours 
145mm / 5.7inch 
17 days 
Climate in Culebra

Average weather in Fajardo

In September Fajardo generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 24°C (75°F) and high monthly rainfall. So on average the conditions are tolerable that month.

Fajardo
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
31°C / 88°F 
24°C / 75°F 
268 hours 
135mm / 5.3inch 
19 days 
31°C / 88°F 
24°C / 75°F 
235 hours 
134mm / 5.3inch 
18 days 
October   >> October
>>  
31°C / 88°F 
24°C / 75°F 
227 hours 
145mm / 5.7inch 
17 days 
Climate in Fajardo

Is your destination not in the list? Have a look at other destinations in Puerto Rico.

Is September the best time to go to Puerto Rico?

In our opinion September is not the best time to visit Puerto Rico with commonly tolerable weather in San Juan.

On average the best time to visit Puerto Rico is in January, February, March and April with generally perfect weather in San Juan. The worst months are May, June, July, August, September and October that can have tolerable weather conditions.

Interested in more climate information?

We have much more information about the climate in Puerto Rico. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for almost all countries in the world. Are you going to Puerto Rico? Get detailed historical weather averages for many cities in Puerto Rico.

    Not sure yet where to go? We now have a tool which suggests which destination suits your ideal climate conditions. Find out where to go with our weather planner.