Puerto Rico
San Juan in September
🌧️ Rainy seasonWarm, humid and often rainy. Watch for tropical cyclone risk.
🎒 Pack: light, breathable clothes & sunscreen · compact umbrella or rain jacket · quick-dry fabrics
Why September scores 7.8What goes into the score
How it works- Weather comfort6.7
- ✓Warm (30.8°C highs / 27°C lows)
- !Very humid/sticky (dew point 24.3°C)
- !Wet: ~159 mm rain, ~3 heavy-rain days
- Air quality10.0
- ✓Good (within WHO guideline) (PM2.5 ~4 µg/m³)
- Seasonal hazards8.5
- !Tropical cyclone: Peak of the Atlantic/Caribbean hurricane season
- Safety baseline—
| Sep | Jan | |
|---|---|---|
| Score | 7.8 Very good | 9.3 Excellent |
| Season | 🌧️ Rainy season | ☀️ Dry season |
| High / low | 31° / 27° | 28° / 24° |
| Rain | 159 mm | 46 mm |
| Humidity | dew pt 24° | dew pt 21° |
| PM2.5 | 4 µg/m³ | 5 µg/m³ |
Typical-month data: NASA POWER (MERRA-2 reanalysis) 2015–2024 (modelled, not a forecast).
Holidays & crowdsSeptember 2027
Long weekendThere's at least one long weekend. Domestic travel picks up and popular spots get busier over those days.
- Labor Day 4–6 Sep · 3 days off in a row
National holidays only; regional holidays and school breaks aren't included. Source: holidays (open-source public-holiday calendar).
Explore San JuanEvents, sights, food & souvenirs
Check event dates locallyPuerto Rico's capital, known for the colourful streets and Spanish forts of Old San Juan, Condado beaches and nearby El Yunque rainforest.
No major events on our calendar for September.
Coming up later
Fiestas de la Calle San SebastiánDate variesUsually a weekend in mid-January
A big street festival with music, crafts and parades.
Why go: Very crowded; parking is difficult.
Where: Old San Juan
Three Kings DayEvery year6 January every year
A holiday when children get gifts, near the end of the long Christmas season.
Why go: Public holiday.
Where: Island-wide
Noche de San JuanEvery yearNight of 23 June every year
People walk backwards into the sea at midnight for good luck.
Why go: Beaches get busy.
Where: Beaches
Castillo San Felipe del Morro
A 16th-century Spanish fort guarding the entrance to San Juan Bay, part of a US National Historic Site.
Castillo San Cristóbal
The largest Spanish fort in the Americas, on the land side of Old San Juan.
Old San Juan
A walled colonial district of blue cobblestones and pastel buildings.
El Yunque National Forest
A tropical rainforest east of the city with waterfalls and trails.
Laguna Grande
A bioluminescent lagoon in Fajardo, visited by kayak at night.
💡 Darker nights around the new moon are best.
Condado and Isla Verde beaches
City beaches lined with hotels.
💡 Hurricane season runs June to November.
Mofongo
Mashed fried green plantain with garlic, often filled with meat or seafood.
💡 Local restaurants
Lechón
Spit-roasted pork.
💡 Guavate in Cayey, known for lechón restaurants
Alcapurrias and bacalaítos
Fried fritters of plantain or salt cod.
💡 Beach kiosks in Piñones
Piña colada
A rum, coconut and pineapple cocktail that San Juan claims as its own.
💡 Bars
Coquito
A coconut and rum drink made at Christmas.
💡 Homes and shops in the holiday season
Puerto Rican rum
Rum from the island's distilleries.
💡 Liquor shops
Vejigante masks
Colourful festival masks.
💡 Craft shops
Puerto Rican coffee
Coffee grown in the island's mountains.
💡 Shops and cafes
Santos
Small carved wooden saints, a traditional folk art.
💡 Craft shops
Airport transfer Kiwitaxi
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