Click on a day for an hourly weather forecast
The temperatures in Puerto Rico in September are comfortable with low of 15°C and and high up to 28°C.
You can expect up to 3 rainy days in Puerto Rico during the month of September.
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 | 16° / 7° | 4 | 27 | 0 | 45 mm | Good | Puerto Rico in January |
| February | 17° / 7° | 4 | 25 | 0 | 46 mm | Good | Puerto Rico in February |
| March | 18° / 8° | 4 | 27 | 0 | 47 mm | Good | Puerto Rico in March |
| April | 20° / 9° | 2 | 28 | 0 | 19 mm | Good | Puerto Rico in April |
| May | 22° / 10° | 1 | 30 | 0 | 10 mm | Good | Puerto Rico in May |
| June | 25° / 13° | 0 | 30 | 0 | 4 mm | Perfect | Puerto Rico in June |
| July | 27° / 14° | 0 | 31 | 0 | 2 mm | Perfect | Puerto Rico in July |
| August | 27° / 15° | 0 | 31 | 0 | 2 mm | Perfect | Puerto Rico in August |
| September | 28° / 15° | 0 | 30 | 0 | 4 mm | Perfect | Puerto Rico in September |
| October | 24° / 14° | 1 | 30 | 0 | 19 mm | Perfect | Puerto Rico in October |
| November | 19° / 10° | 2 | 28 | 0 | 28 mm | Good | Puerto Rico in November |
| December | 15° / 7° | 4 | 27 | 0 | 42 mm | Good | Puerto Rico in December |