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September Weather in Ciales, Puerto Rico

Last updated: August 31, 2025

In September, the average temperature in Ciales, Puerto Rico hovers around 26°C (79°F), with a pleasant range between 22°C (72°F) and 32°C (90°F). During this time, you can expect 205 mm (8.1 in) of precipitation spread over approximately 26 days, resulting in a relatively high average humidity of 79%. Be prepared for a humid yet warm experience!

September Temperature in Ciales

In September in Ciales, the average temperature is 26°C (79°F). Maximums can reach 32°C (90°F), and minimums can be as low as 22°C (72°F). This mild weather makes it an ideal time for traveling and exploring the local attractions.

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

The chart illustrates September temperature patterns in Ciales, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ciales, September typically has an average temperature of 26°C (79°F), with highs reaching up to 32°C (90°F) and lows dropping to around 22°C (72°F).
JanFebMarAprMayJunJulAugSepOctNovDec737374757778797979787675
Data source: Temperature data for Ciales generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Ciales

In Ciales in September, the total precipitation amount is 205 mm (8.1 in) spread over 26 days.

September Precipitation Trends in Ciales

The chart displays monthly precipitation patterns in Ciales, 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 Ciales, September typically receives around 205 mm (8.1 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec384288871049610411120517111639
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ciales

In Ciales in September humidity is 79%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace that can make outdoor activities feel exhausting. Travelers should be prepared for a heavy air that clings to the skin, making hydration essential while navigating the sights and sounds of the city.

September Average Humidity in Ciales

This chart illustrates the average monthly humidity levels in Ciales, 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 Ciales is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%74%75%75%77%80%80%79%78%78%76%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ciales

In Ciales 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 Ciales.

Maximum UV Index Levels in Ciales for September

The chart shows the monthly maximum UV Index (UVI) for Ciales 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 Ciales typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131314131313131298
Data source: Ciales 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 Ciales Compares to Other Months

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

This table compares monthly weather conditions in Ciales, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)38 mm (1.5 inches)76%very high
February Weather23°C (74°F)42 mm (1.7 inches)75%extreme
March Weather23°C (74°F)88 mm (3.4 inches)74%extreme
April Weather24°C (75°F)87 mm (3.4 inches)75%extreme
May Weather25°C (77°F)104 mm (4.1 inches)75%extreme
June Weather26°C (79°F)96 mm (3.8 inches)77%extreme
July Weather26°C (80°F)104 mm (4.1 inches)80%extreme
August Weather26°C (80°F)111 mm (4.4 inches)80%extreme
September Weather26°C (79°F)205 mm (8.1 inches)79%extreme
October Weather25°C (78°F)171 mm (6.7 inches)78%extreme
November Weather25°C (77°F)116 mm (4.6 inches)78%very high
December Weather24°C (75°F)39 mm (1.5 inches)76%very high

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