Weather in Puerto Rico for September 2027
In general, the average temperature in Puerto Rico at the beginning of September is 31.2 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 31 °C by the end of September.
Puerto Rico in September brings notable rainfall, with an average of 16 rainy days and a total precipitation of 190.5 mm.
Is September a good time to visit Puerto Rico? check out the best time to travel to Puerto Rico page.
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Puerto Rico Weather September
What’s the Weather Like in Puerto Rico This September?
Temperatures trend during September in Puerto Rico
September weather in Puerto Rico day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. |  Light rain | 31° /26° | 4.2 mm | 8 | |
| 2 Sept. | Light rain | 31° /26° | 2.6 mm | 7 | |
| 3 Sept. |  Patchy rain possible | 32° /26° | 0.7 mm | 9 | |
| 4 Sept. |  Partly cloudy | 32° /26° | 0.6 mm | 7 | |
| 5 Sept. | Light rain | 31° /26° | 5.2 mm | 6 | |
| 6 Sept. |  Overcast | 32° /26° | 0.8 mm | 6 | |
| 7 Sept. |  Heavy rain at times | 31° /26° | 11.2 mm | 7 | |
| 8 Sept. | Light rain | 30° /26° | 4.4 mm | 7 | |
| 9 Sept. | Light rain | 31° /26° | 7.4 mm | 7 | |
| 10 Sept. | Light rain | 31° /25° | 7.8 mm | 6 | |
| 11 Sept. | Light rain | 31° /26° | 3.2 mm | 6 | |
| 12 Sept. | Patchy rain possible | 32° /26° | 1 mm | 7 | |
| 13 Sept. | Patchy rain possible | 31° /26° | 1.7 mm | 7 | |
| 14 Sept. | Light rain | 32° /26° | 4.8 mm | 6 | |
| 15 Sept. | Light rain | 32° /26° | 4.7 mm | 6 | |
| 16 Sept. | Light rain | 32° /26° | 3.8 mm | 6 | |
| 17 Sept. |  Thundery outbreaks possible | 30° /26° | 13.8 mm | 6 | |
| 18 Sept. | Patchy rain possible | 30° /26° | 2.3 mm | 6 | |
| 19 Sept. | Patchy rain possible | 31° /26° | 2.2 mm | 6 | |
| 20 Sept. |  Moderate rain | 32° /26° | 22.2 mm | 6 | |
| 21 Sept. | Moderate rain | 31° /25° | 23.5 mm | 6 | |
| 22 Sept. | Patchy rain possible | 31° /26° | 0.9 mm | 7 | |
| 23 Sept. | Moderate rain | 31° /26° | 11.9 mm | 8 | |
| 24 Sept. | Light rain | 31° /26° | 3.1 mm | 8 | |
| 25 Sept. | Moderate rain | 31° /26° | 24.8 mm | 8 | |
| 26 Sept. | Moderate rain | 31° /26° | 15.3 mm | 8 | |
| 27 Sept. | Patchy rain possible | 30° /26° | 1.7 mm | 6 | |
| 28 Sept. | Patchy rain possible | 32° /25° | 1.7 mm | 6 | |
| 29 Sept. | Patchy rain possible | 31° /26° | 1.7 mm | 7 | |
| 30 Sept. | Patchy rain possible | 32° /26° | 1.2 mm | 6 | |
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Guide for Puerto Rico in September
In September, Puerto Rico experiences warm and humid weather, with occasional rain showers due to the tail end of the Caribbean hurricane season. At the beginning of the month, the average temperature in Puerto Rico is around 28°, with high humidity levels.
The island typically sees some scattered showers and thunderstorms during this time, but they are usually short-lived and followed by sunny skies.
Toward the end of September, the average temperature remains similar, around 28°, with continued high humidity. The chance of rain showers and thunderstorms may increase slightly as the month progresses, as the Caribbean hurricane season reaches its peak.
However, Puerto Rico generally experiences a mix of sun and clouds, making it a great time to enjoy the island's beautiful beaches and outdoor activities.
Overall, September in Puerto Rico offers warm and tropical weather, perfect for beach vacations and exploring the island's natural beauty. However, travelers should keep an eye on weather forecasts for any potential tropical disturbances that may affect the region during this time.