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September Weather in San Lorenzo, Puerto Rico

Last updated: August 31, 2025

In September, the average temperature in San Lorenzo, Puerto Rico hovers around 27°C (81°F), with a minimum of 23°C (74°F) and a maximum of 32°C (90°F). Expect 200 mm (7.9 in) of precipitation over approximately 27 days, contributing to an average humidity of 79%. Perfect for those who enjoy a touch of warmth and occasional rain!

September Temperature in San Lorenzo

In September in San Lorenzo, the average temperature is 27°C (81°F). Maximums can reach 32°C (90°F) and minimums can be as low as 23°C (74°F). This pleasant climate makes San Lorenzo a great destination for travelers looking to enjoy warm and comfortable weather.

September Weather in San Lorenzo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Lorenzo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Lorenzo, September typically has an average temperature of 27°C (81°F), with highs reaching up to 32°C (90°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec757575777980818181807877
Data source: Temperature data for San Lorenzo 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 San Lorenzo

In San Lorenzo in September, the precipitation amount is 200 mm (7.9 in) occurring over the course of 27 days.

September Precipitation Trends in San Lorenzo

The chart displays monthly precipitation patterns in San Lorenzo, 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 San Lorenzo, September typically receives around 200 mm (7.9 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec485380779810012413020018312066
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Lorenzo

In San Lorenzo in September, humidity is 79%. With an average temperature of 27°C (81°F), this humidity feels like a warm and sticky embrace, making travel both challenging and invigorating as the air clings to your skin, urging you to seek shade or a refreshing drink.

September Average Humidity in San Lorenzo

This chart illustrates the average monthly humidity levels in San Lorenzo, 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 San Lorenzo 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 San Lorenzo

In San Lorenzo 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 San Lorenzo.

Maximum UV Index Levels in San Lorenzo for September

The chart shows the monthly maximum UV Index (UVI) for San Lorenzo 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 San Lorenzo typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131314131213131298
Data source: San Lorenzo 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 San Lorenzo Compares to Other Months

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

This table compares monthly weather conditions in San Lorenzo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather24°C (76°F)48 mm (1.9 inches)76%very high
February Weather24°C (75°F)53 mm (2.1 inches)75%extreme
March Weather24°C (76°F)80 mm (3.2 inches)74%extreme
April Weather25°C (77°F)77 mm (3.0 inches)75%extreme
May Weather26°C (79°F)98 mm (3.9 inches)75%extreme
June Weather27°C (80°F)99 mm (3.9 inches)77%extreme
July Weather27°C (81°F)124 mm (4.9 inches)80%extreme
August Weather27°C (81°F)130 mm (5.1 inches)80%extreme
September Weather27°C (81°F)200 mm (7.9 inches)79%extreme
October Weather27°C (80°F)183 mm (7.2 inches)78%extreme
November Weather26°C (79°F)120 mm (4.7 inches)78%very high
December Weather25°C (77°F)66 mm (2.6 inches)76%very high

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