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Puerto Rico weather

Weather in Puerto Rico for September 2025

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

    Official Weather Alert ⚠️

  • Hydrologic Outlook - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Puerto Rico is slightly cooler than the historical average by -1.2 °C.

  • Expect cooler weather in the next days in Puerto Rico with the forecast suggesting a temperature of 30.4 °C, lower than the historical average.

  • In general, the average temperature in Puerto Rico at the beginning of September is 31.6 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 30.9 °C by the end of September.

    • Rain 🌧️

  • Puerto Rico in September brings notable rainfall, with an average of 17 rainy days and a total precipitation of 128.5 mm.

Average dry days
13
Dry days
Average rainy days
17
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/26°
Temperatures
Average wind speed
21 km/h
Avg max wind
Average humidity
77 %
Avg humidity

Puerto Rico Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Partly cloudy
32°
2
Patchy rain possible
32°
3
Patchy rain possible
32°
4
Partly cloudy
32°
5
Cloudy
31°
6
Partly cloudy
31°
7
Heavy rain at times
31°
8
Patchy rain possible
30°
9
Patchy rain possible
31°
10
Patchy light rain with thunder
31°
11
Light rain shower
31°
12
Partly cloudy
32°
13
Partly cloudy
32°
14
Partly cloudy
32°
15
Partly cloudy
33°
16
Weather Alert Moderate rain
31°
17
Weather Alert Heavy rain
29°
18
Moderate rain
30°
19
Heavy rain
30°
20
Moderate rain
31°
21
Partly cloudy
30°
22
Partly cloudy
30°
23
Sunny
31°
24
Sunny
30°
25
Patchy rain possible
31°
26
Patchy rain possible
31°
27
Patchy rain possible
31°
28
Patchy rain possible
31°
29
Patchy rain possible
30°
30
Patchy rain possible
32°

What’s the Weather Like in Puerto Rico This September?

Discover the average temperatures and weather trends across Puerto Rico’s cities this September.
Patchy rain possibleSan Juan31 °C / 26 °CPatchy rain possiblePonce31 °C / 25 °CPatchy rain possibleBayamón31 °C / 26 °CPatchy rain possibleAguadilla31 °C / 25 °CPatchy rain possibleMayagüez31 °C / 25 °CMore Locations

Temperatures trend during September in Puerto Rico

See the weather trend as well as the moving average line

September weather in Puerto Rico day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Partly cloudy
Partly cloudy
 32° /25° 0.6 mm 7
2 Sept. Patchy rain possible
Patchy rain possible
 32° /25° 1.7 mm 7
3 Sept. Patchy rain possible
Patchy rain possible
 32° /25° 0.7 mm 7
4 Sept. Partly cloudy
Partly cloudy
 32° /26° 0.3 mm 7
5 Sept. Cloudy
Cloudy
 31° /26° 6.8 mm 7
6 Sept. Partly cloudy
Partly cloudy
 31° /25° 0.5 mm 7
7 Sept. Heavy rain at times
Heavy rain at times
 31° /25° 13.8 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 30° /26° 5.7 mm 7
9 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 7.9 mm 7
10 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 31° /25° 8.3 mm 7
11 Sept. Light rain shower
Light rain shower
 31° /25° 4.2 mm 7
12 Sept. Partly cloudy
Partly cloudy
 32° /25° 1.3 mm 8
13 Sept. Partly cloudy
Partly cloudy
 32° /25° 1.3 mm 8
14 Sept. Partly cloudy
Partly cloudy
 32° /25° 5.7 mm 7
15 Sept. Partly cloudy
Partly cloudy
 33° /25° 5.9 mm 7
16 Sept. Moderate rain
Moderate rain
 31° /28° 11.3 mm 2.7
17 Sept. Heavy rain
Heavy rain
 29° /27° 43.6 mm 2.6
18 Sept. Moderate rain
Moderate rain
 30° /27° 15.1 mm 2
19 Sept. Heavy rain
Heavy rain
 30° /27° 21.5 mm 2.5
20 Sept. Moderate rain
Moderate rain
 31° /26° 9 mm 0.2
21 Sept. Partly cloudy
Partly cloudy
 30° /26° 0.1 mm 7
22 Sept. Partly cloudy
Partly cloudy
 30° /25° 0.1 mm 7
23 Sept. Sunny
Sunny
 31° /25° 0 mm 7
24 Sept. Sunny
Sunny
 30° /25° 0.1 mm 7
25 Sept. Patchy rain possible
Patchy rain possible
 31° /26° 2.4 mm 6
26 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 0.5 mm 6
27 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 2.7 mm 6
28 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 0.3 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
 30° /26° 0.1 mm 6
30 Sept. Patchy rain possible
Patchy rain possible
 32° /26° 0.7 mm 8
Next
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.
Change Month
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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.

Puerto Rico in September - FAQ

What are the expected maximum and minimum temperatures in Puerto Rico during September?
During September, expect a variety of temperatures with highs around 31° and lows near 26°, suitable for diverse activities and preferences.
How much rainfall should be expected in Puerto Rico during September?
Significant rainfall exceeding 128.5 mm is expected in Puerto Rico during September, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Puerto Rico during September?
The average wind speed in Puerto Rico during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.

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 ☀️
Regions in Puerto Rico
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AguadillaBayamónMayagüezPonceSan Juan
Top locations in Puerto Rico
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AguadillaBayamónMayagüezPonceSan Juan
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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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