Click on a day for an hourly weather forecast
The weather in Puerto Rico in September is very hot. The average temperatures are between 26°C and 30°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Puerto Rico. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Puerto Rico in September 2025.
If you’re planning to visit Puerto Rico in the near future, we highly recommend that you review the 14 day weather forecast for Puerto Rico before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 27° / 22° | 2 | 29 | 0 | 62 mm | Perfect | Puerto Rico in January |
| February | 27° / 22° | 2 | 26 | 0 | 58 mm | Perfect | Puerto Rico in February |
| March | 27° / 22° | 3 | 28 | 0 | 74 mm | Perfect | Puerto Rico in March |
| April | 28° / 23° | 4 | 26 | 0 | 91 mm | Perfect | Puerto Rico in April |
| May | 28° / 24° | 8 | 23 | 0 | 152 mm | Good | Puerto Rico in May |
| June | 29° / 25° | 5 | 25 | 0 | 100 mm | Good | Puerto Rico in June |
| July | 29° / 25° | 5 | 26 | 0 | 119 mm | Good | Puerto Rico in July |
| August | 29° / 25° | 8 | 23 | 0 | 184 mm | Ok | Puerto Rico in August |
| September | 30° / 26° | 9 | 21 | 0 | 197 mm | Ok | Puerto Rico in September |
| October | 29° / 25° | 10 | 21 | 0 | 185 mm | Ok | Puerto Rico in October |
| November | 28° / 24° | 8 | 22 | 0 | 174 mm | Good | Puerto Rico in November |
| December | 27° / 23° | 4 | 27 | 0 | 82 mm | Perfect | Puerto Rico in December |