Puerto Rico

Puerto Rico Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Puerto Rico in September.

Considering a trip to Puerto Rico this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What to Expect in Puerto Rico in September

September in Puerto Rico generally has temperatures that range from warm to very warm, with precipitation levels ranging from high to heavy.

Temperatures

The average maximum daytime temperatures vary from warm in Adjuntas at 27°C (81°F) to very warm in Dorado at 31°C (88°F). Nighttime temperatures generally drop to 25°C (77°F) in Dorado and 19°C (66°F) in Adjuntas. The temperatures mentioned for both day and night are typical averages. However some days might get even hotter. It's best to stay prepared by wearing cloths suitable for the warmth.

To explore the conditions in Puerto Rico in more detail, check the map below.

Precipitation

In September, precipitation varies across different areas. From high rainfall in El Combate with an average of 104 mm (4.1 in) to heavy rainfall in Humacao with 192 mm (7.6 in). Looking at the climate data spanning the last 30 years, this month sees the heaviest rainfall of the year in San Juan.

Average sunshine

September brings good sunshine to many areas. San Juan sees around 236 hours of sunlight, great for visitors looking for bright days.

Explore Puerto Rico by month

Pick a month to see the average temperature, rainfall and sunshine in Puerto Rico — and find the best time to visit. (based on San Juan)

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.

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Puerto Rico

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

Temperature range in Puerto Rico (September)

Precipitation variation in Puerto Rico (September)

San Juan

In September San Juan generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 25°C (77°F) and high monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
31°C (88°F)
31°C (88°F)
31°C (88°F)
Min temperature
25°C (77°F)
25°C (77°F)
25°C (77°F)
Monthly sun hours
267 hours
236 hours
228 hours
Monthly rainfall
118 mm (4.6 in)
159 mm (6.3 in)
146 mm (5.7 in)
Monthly rainy days
20 days
18 days
18 days
Weather conditions

Rincon

In September Rincon generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly rainfall
77 mm (3 in)
111 mm (4.4 in)
82 mm (3.2 in)
Monthly rainy days
18 days
17 days
17 days
Weather conditions

Vieques

In September Vieques generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
29°C (84°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly sun hours
267 hours
236 hours
228 hours
Monthly rainfall
149 mm (5.9 in)
176 mm (6.9 in)
159 mm (6.3 in)
Monthly rainy days
20 days
18 days
19 days
Weather conditions

Culebra

In September Culebra generally has high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 27°C (81°F) and high monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
29°C (84°F)
Min temperature
27°C (81°F)
27°C (81°F)
26°C (79°F)
Monthly rainfall
130 mm (5.1 in)
159 mm (6.3 in)
145 mm (5.7 in)
Monthly rainy days
20 days
18 days
19 days
Weather conditions

Fajardo

In September Fajardo generally has very high temperatures with maximum daytime temperatures around 30°C (86°F), minimum nighttime temperatures around 26°C (79°F) and heavy monthly rainfall. So on average the conditions are tolerable that month.

August
September
October
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
26°C (79°F)
26°C (79°F)
Monthly sun hours
267 hours
236 hours
228 hours
Monthly rainfall
152 mm (6 in)
177 mm (7 in)
163 mm (6.4 in)
Monthly rainy days
20 days
18 days
19 days
Weather conditions

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Puerto Rico in September.

City Weather Day temp Night temp Rainfall
San Juan 31°C (88°F) 25°C (77°F) 159 mm (6.3 in)
Rincon 30°C (86°F) 27°C (81°F) 111 mm (4.4 in)
Vieques 30°C (86°F) 27°C (81°F) 176 mm (6.9 in)
Luquillo 30°C (86°F) 26°C (79°F) 166 mm (6.5 in)
La Parguera 30°C (86°F) 26°C (79°F) 122 mm (4.8 in)
Ponce 30°C (86°F) 25°C (77°F) 142 mm (5.6 in)

Puerto Rico weather in September: frequently asked questions

What is the weather like in Puerto Rico in September?

September in Puerto Rico brings unpleasant weather. In San Juan, daytime temperatures are typically around 31°C (88°F) and nighttime lows hover near 25°C (77°F).

What is the average temperature in Puerto Rico in September?

In San Juan, the average daytime high in September is 31°C (88°F), while nighttime temperatures drop to around 25°C (77°F).

Does Puerto Rico get a lot of rain in September?

San Juan typically receives notable rainfall in September, about 159 mm (6.3 in) on average across Puerto Rico.

Is September a Good Time to Visit Puerto Rico?

In our view, September might not be the best time to travel to Puerto Rico with often tolerable weather in San Juan.

Generally speaking, the best visiting conditions can be found in January, February, March and December offering mostly perfect weather in San Juan. The weather in May, July, August, September, October and November, on the other hand, tends to be unpleasant.

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.

Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.