September Weather in Yauco, Puerto Rico

Last updated: August 31, 2025

In September, the average temperature in Yauco, Puerto Rico reaches a cozy 27°C (80°F). Temperatures can drop to a minimum of 24°C (75°F) while soaring to a maximum of 31°C (88°F). However, be prepared for the elements, as precipitation can accumulate to about 167 mm (6.6 in) over 23 days, coupled with an average humidity of 79%.

September Temperature in Yauco

In September in Yauco, the average temperature is 27°C (80°F), with maximums reaching 31°C (88°F) and minimums dropping to as low as 24°C (75°F). This pleasant climate makes it an ideal time for exploring and enjoying outdoor activities in Yauco.

September Weather in Yauco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Yauco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yauco, September typically has an average temperature of 27°C (80°F), with highs reaching up to 31°C (88°F) and lows dropping to around 24°C (75°F).

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

September Precipitation in Yauco

In Yauco in September, the precipitation amount is 167 mm (6.6 in) over the course of 23 days.

September Precipitation Trends in Yauco

The chart displays monthly precipitation patterns in Yauco, 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 Yauco, September typically receives around 167 mm (6.6 inches) of precipitation spread over approximately 23 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Yauco

In Yauco in September humidity is 79%. With an average temperature of 27°C (80°F), this humidity feels like walking through a warm, dense blanket, making travel feel sluggish and allowing every step to become noticeably heavier.

September Average Humidity in Yauco

This chart illustrates the average monthly humidity levels in Yauco, 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 Yauco 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 Yauco

In Yauco in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Yauco.

Maximum UV Index Levels in Yauco for September

The chart shows the monthly maximum UV Index (UVI) for Yauco 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 Yauco typically reaches 13, which falls under the extreme exposure category.

Data source: Yauco 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 Yauco Compares to Other Months

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

This table compares monthly weather conditions in Yauco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (76°F)	19 mm (0.8 inches)	76%	very high
February Weather	24°C (76°F)	26 mm (1.0 inches)	75%	extreme
March Weather	24°C (76°F)	53 mm (2.1 inches)	75%	extreme
April Weather	25°C (76°F)	55 mm (2.1 inches)	76%	extreme
May Weather	25°C (78°F)	67 mm (2.6 inches)	76%	extreme
June Weather	26°C (80°F)	61 mm (2.4 inches)	78%	extreme
July Weather	27°C (80°F)	90 mm (3.5 inches)	81%	extreme
August Weather	27°C (81°F)	94 mm (3.7 inches)	80%	extreme
September Weather	27°C (80°F)	167 mm (6.6 inches)	79%	extreme
October Weather	26°C (79°F)	107 mm (4.2 inches)	78%	extreme
November Weather	26°C (78°F)	87 mm (3.4 inches)	78%	very high
December Weather	25°C (77°F)	25 mm (1.0 inches)	77%	very high