Puerto Rico

Puerto Rico Weather in August

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

Planning a getaway to Puerto Rico this August and curious about the weather you should prepare for? Discover all the vital details you need on this page, solving your puzzle:

What to Expect in Puerto Rico in August

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

Temperatures

The average highest temperatures fluctuate between warm in Adjuntas at 28°C (82°F) to very warm in Utuado at 32°C (90°F). Nighttime temperatures generally drop to 24°C (75°F) in Utuado and 19°C (66°F) in Adjuntas. In Puerto Rico, August typically stands out as the hottest month of the year. If you're planning a visit during this time, it would be wise to come prepared. Packing light and breathable summer cloths will ensure you stay comfortable throughout your stay.

For a closer look at conditions across Puerto Rico, refer to the map below.

Precipitation

In August, precipitation varies across different areas. From moderate rainfall in El Combate with an average of 68 mm (2.7 in) to heavy rainfall in Naguabo with 162 mm (6.4 in).

Average sunshine

Many locations offer abundant sunshine during this month. For instance, San Juan enjoys approximately 267 hours of sunlight, ideal for those seeking sunny weather.

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 August

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 August for some of the most popular destinations in Puerto Rico?

Temperature range in Puerto Rico (August)

Precipitation variation in Puerto Rico (August)

San Juan

In August 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 good that month.

July
August
September
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
281 hours
267 hours
236 hours
Monthly rainfall
102 mm (4 in)
118 mm (4.6 in)
159 mm (6.3 in)
Monthly rainy days
19 days
20 days
18 days
Weather conditions

Rincon

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

July
August
September
Max temperature
30°C (86°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
27°C (81°F)
27°C (81°F)
Monthly rainfall
60 mm (2.4 in)
77 mm (3 in)
111 mm (4.4 in)
Monthly rainy days
18 days
18 days
17 days
Weather conditions

Vieques

In August Vieques 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 good that month.

July
August
September
Max temperature
29°C (84°F)
30°C (86°F)
30°C (86°F)
Min temperature
26°C (79°F)
27°C (81°F)
27°C (81°F)
Monthly sun hours
281 hours
267 hours
236 hours
Monthly rainfall
131 mm (5.2 in)
149 mm (5.9 in)
176 mm (6.9 in)
Monthly rainy days
19 days
20 days
18 days
Weather conditions

Culebra

In August 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 good that month.

July
August
September
Max temperature
29°C (84°F)
30°C (86°F)
30°C (86°F)
Min temperature
27°C (81°F)
27°C (81°F)
27°C (81°F)
Monthly rainfall
110 mm (4.3 in)
130 mm (5.1 in)
159 mm (6.3 in)
Monthly rainy days
19 days
20 days
18 days
Weather conditions

Fajardo

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

July
August
September
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
281 hours
267 hours
236 hours
Monthly rainfall
139 mm (5.5 in)
152 mm (6 in)
177 mm (7 in)
Monthly rainy days
19 days
20 days
18 days
Weather conditions

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

Popular cities in August

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

City Weather Day temp Night temp Rainfall
San Juan 31°C (88°F) 25°C (77°F) 118 mm (4.6 in)
Rincon 30°C (86°F) 27°C (81°F) 77 mm (3 in)
Vieques 30°C (86°F) 27°C (81°F) 149 mm (5.9 in)
Luquillo 30°C (86°F) 26°C (79°F) 143 mm (5.6 in)
La Parguera 31°C (88°F) 26°C (79°F) 83 mm (3.3 in)
Ponce 30°C (86°F) 25°C (77°F) 92 mm (3.6 in)

Puerto Rico weather in August: frequently asked questions

What is the weather like in Puerto Rico in August?

Puerto Rico typically experiences mixed weather in August, part of the season. Daytime highs in San Juan average around 31°C (88°F), and temperatures drop to about 25°C (77°F) at night.

What is the average temperature in Puerto Rico in August?

San Juan averages a daytime maximum of 31°C (88°F) in August, with overnight lows close to 25°C (77°F).

Does Puerto Rico get a lot of rain in August?

Puerto Rico sees substantial rainfall in August. San Juan typically averages about 118 mm (4.6 in), a mix of wet and dry days, but bring an umbrella.

Is August a Good Time to Visit Puerto Rico?

In our opinion, August may not be the ideal time to visit Puerto Rico due to the typically good weather in San Juan.

On average, the best time to visit Puerto Rico is in January, February, March and December with generally excellent weather in San Juan. The weather in May, July, August, September, October and November, on the other hand, tends to be mixed.

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.