September Weather in Puerto Rico

Last updated: March 2, 2024

The weather in Puerto Rico, Spain, during September is characterized by an average temperature of 22°C (73°F). Highs can soar to 27°C (81°F), while lows may dip to 20°C (68°F). Typically, the humidity level in Puerto Rico throughout September hovers around 88%.

20°C (68°F)

Minimum temperature

22°C (73°F)

Average temperature

27°C (81°F)

Maximum temperature



Precipitation and Sunshine hours

In September, Puerto Rico averages 2 mm (0.1 inches) of rainfall, typically over the course of 0 rainy days. The month enjoys an average of 12 hours 17 minutes of daylight, with the sun shining for approximately 11 hours 23 minutes each day. Additionally, there is a 84% probability of sunny days during this period.

2 mm (0.1 inches)


0 rainy days

Rainy days

11 hours 23 minutes

Sunshine hours


Chance of sun

UV Index

In September, the UV Index in Puerto Rico reaches a maximum of 11, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 14:00 and 16:00, during which unprotected skin may burn in as little as 10 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 0 1 1 3 5 8 10 11 10 7 5 2 1
Exposure Low Moderate VeryHigh Extreme VeryHigh High Moderate Low
Time to burn 45 min 30 min 15 min 10 min 15 min 25 min 30 min 45 min

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