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Puerto Rico, Puerto Rico · Tropical

Puerto Rico in September: go or not?

Mixed period. Puerto Rico in September: 4.6/10.

📅 Updated August 2026 🛰️ ERA5 · 10 years 📍 18.47°N · 66.11°W
⚡ This month's verdict
Why not
Puerto Rico · September
4.6
25–31°
Temperature
74%
Rain
6h
Sun
🌴 Tropical☀️ High UV🌧️ Monsoon season
Photo : Allison Murray via Unsplash
The month in detail

What to expect in September

September falls in the wet season in Puerto Rico. Showers are often brief but intense. With 74.0% of rainy days, always have indoor alternatives planned.

September ranks 12 out of 12 months in Puerto Rico. Compared to August: 9 pts more rainy days, −0.7h of sun per day.

This month's conditions

What it's like in September

UV index
8 · very high
protection essential
Feels like
very humid
24°
Sea
30°C
warm, ideal
Daylight
12.1h of daylight
Air quality
excellent
AQI 16
Compare

Is September the right month?

The best month in Puerto Rico is January (7.9/10), 3.3 pts higher than September.

See January →See all 12 months →
Context

Our verdict

Puerto Rico is a US territory in the Caribbean: 3 million inhabitants, official Spanish + English, US dollar, beaches, tropical forest (El Yunque). January is my favorite month (8.3/10): 72-82°F, 47% rain, end of the American high season, mild temperatures.

Read Gilles' full review →

Book

Plan your trip

Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.

🏨
Stay
Hotels & rentals · Puerto Rico
Expedia →
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Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →

🎟️ Activities & tours · Puerto Rico

GetYourGuide selection · free cancellation

See all →
Affiliate link · GetYourGuide
Practical info

What you need to know before you go

Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.

Country · Puerto Rico

🗣️LanguageEnglish
💶CurrencyUS Dollar ($)
🚗DrivingRight-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘExpensive · 4/5

🌡️ Climate

🌍Climate typeTropical
📈Climate trend ⓘStable
🔥Hottest monthJune · 88°F
❄️Coolest monthJanuary · 82°F
🌧️Rainiest month ⓘSeptember · 74%

🏝️ Tropical stay

🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore

Other destinations in September

If September doesn't convince you for this destination, compare with others.

Similar climate
San JuanPuerto RicoAntiguaAntigua and BarbudaBasseterreSaint Kitts and NevisGuadeloupeGuadeloupeMartiniqueMartinique
Nearby
Saint ThomasUS Virgin Islands125 kmPunta CanaDominican Republic242 kmSaint MartinSaint Martin326 kmSaint BarthélemySaint Barthélemy352 km
Other top picks
Cape VerdeCape Verde5.3SalCape Verde5.6Marsa AlamEgypt5.8Sharm el-SheikhEgypt5.8HurghadaEgypt5.9
← AugustOctober →
🗺️ See all 754 destinations on the map
Location

Where is Puerto Rico ?

Global position + regional geographic context.

🌍 World
🔍 Geographic context
Puerto Rico
Tropical climate with a 7.9 → 4.6 gap between best and worst month. 10 years of ERA5 data to choose by project.
18.47°N · 66.11°W
Questions

Frequently asked questions

What is the best time to visit Puerto Rico?
January is the best month with 82°F highs, 72°F lows, 6.7h of sunshine and 47.0% rainy days. The months of January & February offer comparable conditions.
How many hours of sunshine does Puerto Rico get in January?
Puerto Rico averages 6.7 sunshine hours per day in January. It is the sunniest month with a climate score of 7.4/10.
What is the rainiest month in Puerto Rico?
September is the most unfavourable month with September has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Puerto Rico in January?
In January, overnight lows reach 72°F, while afternoon highs average 82°F.
Is Puerto Rico good in winter?
In winter (December-February), Puerto Rico scores 7.3/10 on average — Acceptable conditions for cultural visits.. The best month overall remains January with a score of 7.4/10.
When should you avoid Puerto Rico?
September is the most difficult month to visit Puerto Rico, with September has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Puerto Rico in September?
In September, the sea averages 87°F in Puerto Rico: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Puerto Rico in September?
The average UV index reaches 8 in September in Puerto Rico (very high), with about 12.1h of daylight. Protection essential.