September · Puerto Rico
Best time to visit San Juan in SeptemberWeather, crowds & prices
September score
7.7/10
Ranked #9 of 12 months
- Avg temp
- 29°C
- Rainfall
- 151 mm
- Humidity
- 79%
- Sunny days
- 26
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $$ · Moderate Cost ($$)
September in San Juan scores 7.7/10 for beach and coastal travel - ranked #9 of 12. Expect around 29°C, 151 mm of rain, and roughly 26 sunny days this month.
Fort walls and pastel Old San Juan alleys - best timed for December-April.
Frequently asked
- What is the weather like in San Juan in September?
- In September, San Juan averages 29°C, 151 mm of rain, and about 26 sunny days. Its climate-comfort score is 7.7/10.
- Is September a good time to visit San Juan?
- September earns a 7.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in San Juan in September?
- Expect about 151 mm of rain in September. Average humidity is 79% and there are about 26 sunny days.
Curated in San Juan
Tickets & experiences
Things to do in San Juan
San Juan, Puerto Rico. Live activities and tours from GetYourGuide, matched to this destination.