Puerto Rico in September: where is it warmest?
In September, San Juan, Puerto Rico is the warmest place with 31 °C by day, Bayamón the coolest with 31 °C. 0 of 2 destinations have good holiday weather.
All destinations in September, warmest first
Long-term averages for the month: daytime high, sea, sunshine and rainy days.
| Place | Score | Air | Sea | Sun | Rain days |
|---|---|---|---|---|---|
| San Juan, Puerto Rico | 38 | 31° | 29° | 7 h | 21 |
| Bayamón | 38 | 31° | 29° | 7 h | 21 |
Puerto Rico in September: quick answers
Puerto Rico in September: where is it warmest?
The warmest places in September are San Juan, Puerto Rico (31 °C) and Bayamón (31 °C).
Puerto Rico in September: where is the sea warmest?
The sea is warmest at San Juan, Puerto Rico (29 °C) and Bayamón (29 °C).
Puerto Rico in September: where is the weather best?
The best holiday weather in September – warm, sunny and dry – is in San Juan, Puerto Rico and Bayamón.
Puerto Rico month by month
Puerto Rico: weather & best time to visit
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences