In September, the climate in Puerto Rico is fair, but it can vary depending on the regions or cities. Average temperatures are around 28°C, with values ranging approximately from 26°C to 31°C depending on the city and time of day.
Temperatures are warm without being necessarily excessive: average readings reach up to 31°C at the warmest part of the day, and about 26°C at the coolest hours.
Humidity is present in Puerto Rico in September, with average monthly precipitation totals ranging from 101 mm to 287 mm. Some rainy episodes should therefore be expected along the route.
If you are aiming for the seaside, swimming conditions are pleasant: sea temperature usually ranges between 29°C and 30°C.
Among the main destinations, San Juan, Bayamón, Vieques, Carolina and Fajardo are among the most interesting options for the weather.
Overall, the month of September remains feasible to travel to Puerto Rico, but it is better to choose the region or city carefully according to your itinerary.
Some activities remain possible in Puerto Rico in September, in particular: Nightlife, Cultural visits and heritage, Diving and snorkeling, Boat trip and cruise and Watersports.
However, conditions are less suitable for Hiking and trekking: it is best to check the local weather before including them in the programme.
