September Weather in Rio Blanco, Puerto Rico

Last updated: August 31, 2025

In September, the average temperature in Rio Blanco, Puerto Rico hovers around 27°C (82°F), with a pleasant range from a minimum of 24°C (76°F) to a maximum of 31°C (88°F). Expect some rain, as the area receives an average precipitation of 195 mm (7.7 in) spread over 28 days. Additionally, the humidity is relatively high at 79%, adding a tropical touch to your experience.

September Temperature in Rio Blanco

In September in Rio Blanco, the average temperature is 27°C (82°F). Maximums can reach 31°C (88°F), while minimums can dip as low as 24°C (76°F). Overall, this climate offers warm and pleasant weather, making it an ideal time for travel and outdoor activities.

September Weather in Rio Blanco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rio Blanco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Blanco, September typically has an average temperature of 27°C (82°F), with highs reaching up to 31°C (88°F) and lows dropping to around 24°C (76°F).

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

September Precipitation in Rio Blanco

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

September Precipitation Trends in Rio Blanco

The chart displays monthly precipitation patterns in Rio Blanco, 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 Rio Blanco, 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 Rio Blanco

In Rio Blanco 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 Rio Blanco

This chart illustrates the average monthly humidity levels in Rio Blanco, 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 Rio Blanco 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 Rio Blanco

In Rio Blanco 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 Rio Blanco, you can check here.

Maximum UV Index Levels in Rio Blanco for September

The chart shows the monthly maximum UV Index (UVI) for Rio Blanco 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 Rio Blanco typically reaches 14, which falls under the extreme exposure category.

Data source: Rio Blanco 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 Rio Blanco Compares to Other Months

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

This table compares monthly weather conditions in Rio Blanco, 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)	57 mm (2.3 inches)	76%	very high
February Weather	24°C (76°F)	61 mm (2.4 inches)	75%	extreme
March Weather	25°C (76°F)	78 mm (3.1 inches)	74%	extreme
April Weather	25°C (77°F)	79 mm (3.1 inches)	75%	extreme
May Weather	26°C (79°F)	109 mm (4.3 inches)	75%	extreme
June Weather	27°C (80°F)	110 mm (4.3 inches)	77%	extreme
July Weather	27°C (81°F)	149 mm (5.9 inches)	80%	extreme
August Weather	27°C (82°F)	153 mm (6.0 inches)	80%	extreme
September Weather	27°C (82°F)	195 mm (7.7 inches)	79%	extreme
October Weather	27°C (81°F)	187 mm (7.4 inches)	78%	extreme
November Weather	26°C (80°F)	131 mm (5.2 inches)	78%	very high
December Weather	26°C (78°F)	81 mm (3.2 inches)	76%	very high