Weather in Puerto Rico for September 2025
In general, the average temperature in Puerto Rico at the beginning of September is 32 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 31.6 °C by the end of September.
Puerto Rico in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 128.5 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 in September average weather
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  32° | 2  32° | 3 33° | 4 32° | 5  31° | 6 32° | 7  32° |
| 8 30° | 9 30° | 10 31° | 11 31° | 12 33° | 13 32° | 14 33° |
| 15 33° | 16 32° | 17  30° | 18 31° | 19 31° | 20 32° | 21 32° |
| 22 31° | 23 31° | 24 32° | 25 32° | 26 31° | 27 30° | 28 33° |
| 29 31° | 30 32° |
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Temperatures trend during September in Puerto Rico
September weather day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Partly cloudy | 32° /25° | 0.9 mm | 8 | |
| 2 Sept. | Patchy rain possible | 32° /25° | 2.5 mm | 7 | |
| 3 Sept. | Patchy rain possible | 33° /25° | 1 mm | 7 | |
| 4 Sept. | Partly cloudy | 32° /25° | 0.5 mm | 8 | |
| 5 Sept. | Cloudy | 31° /25° | 1.1 mm | 7 | |
| 6 Sept. | Partly cloudy | 32° /24° | 0.8 mm | 8 | |
| 7 Sept. | Heavy rain at times | 32° /25° | 9.2 mm | 7 | |
| 8 Sept. | Patchy rain possible | 30° /25° | 3.2 mm | 7 | |
| 9 Sept. | Patchy rain possible | 30° /25° | 11.9 mm | 7 | |
| 10 Sept. | Patchy rain possible | 31° /25° | 2.6 mm | 7 | |
| 11 Sept. | Light rain shower | 31° /24° | 4.5 mm | 7 | |
| 12 Sept. | Partly cloudy | 33° /25° | 1.9 mm | 8 | |
| 13 Sept. | Partly cloudy | 32° /25° | 0.8 mm | 8 | |
| 14 Sept. | Partly cloudy | 33° /25° | 0.4 mm | 8 | |
| 15 Sept. | Partly cloudy | 33° /25° | 0.1 mm | 8 | |
| 16 Sept. | Partly cloudy | 32° /25° | 0 mm | 8 | |
| 17 Sept. | Thundery outbreaks possible | 30° /26° | 0.6 mm | 7 | |
| 18 Sept. | Patchy rain possible | 31° /26° | 0.8 mm | 8 | |
| 19 Sept. | Partly cloudy | 31° /26° | 0 mm | 7 | |
| 20 Sept. | Patchy rain possible | 32° /25° | 8.2 mm | 7 | |
| 21 Sept. | Patchy rain possible | 32° /25° | 41.2 mm | 7 | |
| 22 Sept. | Patchy rain possible | 31° /25° | 0.2 mm | 7 | |
| 23 Sept. | Patchy rain possible | 31° /25° | 23.4 mm | 7 | |
| 24 Sept. | Patchy rain possible | 32° /25° | 2.7 mm | 8 | |
| 25 Sept. | Patchy rain possible | 32° /26° | 0.2 mm | 8 | |
| 26 Sept. | Patchy rain possible | 31° /26° | 0.5 mm | 7 | |
| 27 Sept. | Patchy rain possible | 30° /26° | 2.5 mm | 7 | |
| 28 Sept. | Patchy rain possible | 33° /26° | 3.2 mm | 7 | |
| 29 Sept. | Patchy rain possible | 31° /26° | 3 mm | 7 | |
| 30 Sept. | Patchy rain possible | 32° /26° | 0.7 mm | 8 | |
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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.
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Puerto Rico in September - FAQ
What to pack to Puerto Rico in September?
As you prepare for your trip to Puerto Rico in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Puerto Rico, during September, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Lightweight Clothing: T-shirts, blouses, shorts, skirts
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Sandals/Flip-flops: Comfortable for warm climates
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Umbrellas/Raincoats: For rainy days
- Personal Items
- Sunscreen: High SPF for sunny destinations
- Lip Balm with SPF: To protect against chapped lips
- Insect Repellent: For destinations with mosquitos or other insects
September rainfall patterns in Puerto Rico
UV exposure in Puerto Rico during September
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Where is Puerto Rico?Get accurate weather forecasts for Puerto Rico, located at latitude 18.466 and longitude -66.106. Stay updated with localized weather information tailored for Puerto Rico.