September Weather in El Negro, Puerto Rico

Last updated: August 31, 2025

In September, the average temperature in El Negro, Puerto Rico is a pleasant 27°C (82°F), with minimums around 25°C (77°F) and maximums reaching 30°C (86°F). Expect a fair amount of rain, with 195 mm (7.7 in) of precipitation spread over 28 days. The average humidity lingers at a warm 79%, creating a tropical atmosphere perfect for enjoying the local scenery!

September Temperature in El Negro

In September in El Negro, the average temperature is 27°C (82°F). Maximums can reach 30°C (86°F), while minimums can drop to as low as 25°C (77°F). Overall, it's a warm and pleasant destination for travel, perfect for enjoying outdoor activities.

September Weather in El Negro: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in El Negro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In El Negro, September typically has an average temperature of 27°C (82°F), with highs reaching up to 30°C (86°F) and lows dropping to around 25°C (77°F).

Data source: Temperature data for El Negro generated using information from the Copernicus Climate Change Service.

September Precipitation in El Negro

In El Negro in September, the total precipitation amount is 195 mm (7.7 in) over the course of 28 days.

September Precipitation Trends in El Negro

The chart displays monthly precipitation patterns in El Negro, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In El Negro, September typically receives around 195 mm (7.7 inches) of precipitation spread over approximately 28 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in El Negro

In El Negro in September humidity is 79%. With an average temperature of 27°C (82°F), this humidity feels like traveling through a warm, thick blanket, making every step feel heavier and more exhausting, while the air clings to your skin, reminding you to stay hydrated and take frequent breaks in the shade.

September Average Humidity in El Negro

This chart illustrates the average monthly humidity levels in El Negro, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in El Negro is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in El Negro

In El Negro in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in El Negro, you can check here.

Maximum UV Index Levels in El Negro for September

The chart shows the monthly maximum UV Index (UVI) for El Negro in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in El Negro typically reaches 14, which falls under the extreme exposure category.

Data source: El Negro September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in El Negro Compares to Other Months

Weather in El Negro varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in El Negro, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in El Negro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (77°F)	52 mm (2.0 inches)	76%	very high
February Weather	25°C (76°F)	54 mm (2.1 inches)	75%	extreme
March Weather	25°C (77°F)	70 mm (2.8 inches)	75%	extreme
April Weather	25°C (78°F)	69 mm (2.7 inches)	76%	extreme
May Weather	26°C (79°F)	101 mm (4.0 inches)	76%	extreme
June Weather	27°C (80°F)	103 mm (4.1 inches)	78%	extreme
July Weather	27°C (81°F)	145 mm (5.7 inches)	81%	extreme
August Weather	27°C (81°F)	148 mm (5.8 inches)	80%	extreme
September Weather	27°C (82°F)	195 mm (7.7 inches)	79%	extreme
October Weather	27°C (81°F)	179 mm (7.1 inches)	78%	extreme
November Weather	26°C (80°F)	129 mm (5.1 inches)	78%	very high
December Weather	26°C (78°F)	75 mm (2.9 inches)	77%	very high