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Weather in Puerto Rico for September 2025

Your guide to Puerto Rico weather in September - trends and predictions
  • 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.

  • Expect significant rainfall in Puerto Rico during September, with an average of 18 rainy days.

  • Is September a good time to visit Puerto Rico? check out the best time to travel to Puerto Rico page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
12
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
32°/25°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Puerto Rico in September average weather

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Temperatures trend during September in Puerto Rico

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
32° /25° 0.9 mm 8
2 Sept. Patchy rain possible
Patchy rain possible
32° /25° 2.5 mm 7
3 Sept. Patchy rain possible
Patchy rain possible
33° /25° 1 mm 7
4 Sept. Partly cloudy
Partly cloudy
32° /25° 0.5 mm 8
5 Sept. Cloudy
Cloudy
31° /25° 1.1 mm 7
6 Sept. Partly cloudy
Partly cloudy
32° /24° 0.8 mm 8
7 Sept. Heavy rain at times
Heavy rain at times
32° /25° 9.2 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
30° /25° 3.2 mm 7
9 Sept. Patchy rain possible
Patchy rain possible
30° /25° 11.9 mm 7
10 Sept. Patchy rain possible
Patchy rain possible
31° /25° 2.6 mm 7
11 Sept. Light rain shower
Light rain shower
31° /24° 4.5 mm 7
12 Sept. Partly cloudy
Partly cloudy
33° /25° 1.9 mm 8
13 Sept. Partly cloudy
Partly cloudy
32° /25° 0.8 mm 8
14 Sept. Partly cloudy
Partly cloudy
33° /25° 0.4 mm 8
15 Sept. Partly cloudy
Partly cloudy
33° /25° 0.1 mm 8
16 Sept. Partly cloudy
Partly cloudy
32° /25° 0 mm 8
17 Sept. Thundery outbreaks possible
Thundery outbreaks possible
30° /26° 0.6 mm 7
18 Sept. Patchy rain possible
Patchy rain possible
31° /26° 0.8 mm 8
19 Sept. Partly cloudy
Partly cloudy
31° /26° 0 mm 7
20 Sept. Patchy rain possible
Patchy rain possible
32° /25° 8.2 mm 7
21 Sept. Patchy rain possible
Patchy rain possible
32° /25° 41.2 mm 7
22 Sept. Patchy rain possible
Patchy rain possible
31° /25° 0.2 mm 7
23 Sept. Patchy rain possible
Patchy rain possible
31° /25° 23.4 mm 7
24 Sept. Patchy rain possible
Patchy rain possible
32° /25° 2.7 mm 8
25 Sept. Patchy rain possible
Patchy rain possible
32° /26° 0.2 mm 8
26 Sept. Patchy rain possible
Patchy rain possible
31° /26° 0.5 mm 7
27 Sept. Patchy rain possible
Patchy rain possible
30° /26° 2.5 mm 7
28 Sept. Patchy rain possible
Patchy rain possible
33° /26° 3.2 mm 7
29 Sept. Patchy rain possible
Patchy rain possible
31° /26° 3 mm 7
30 Sept. Patchy rain possible
Patchy rain possible
32° /26° 0.7 mm 8
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Important Notice
Our weather forecast for Puerto Rico in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Puerto Rico forecast closer to your planned date for the most up-to-date weather information.

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.

Puerto Rico in September - FAQ

Is September a good time to visit Puerto Rico?
You can travel to Puerto Rico in September, but there are probably better months doing so, read more about the best time to visit Puerto Rico
What are the expected maximum and minimum temperatures in Puerto Rico during September?
During September, expect a variety of temperatures with highs around 32° and lows near 25°, suitable for diverse activities and preferences.
How much rainfall should be expected in Puerto Rico during September?
Moderate rainfall is anticipated in Puerto Rico during September, with a total of 65.4 mm spread over approximately 18 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Puerto Rico during September?
The average wind speed in Puerto Rico during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

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

Explore the daily rainfall trends and prepare for Puerto Ricos September weather 💧

UV exposure in Puerto Rico during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates 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.

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