September Weather in San Isidro, Philippines

Last updated: August 27, 2025

In September, the average temperature in San Isidro, Philippines is a warm 28°C (83°F), with daily highs reaching up to 33°C (92°F) and lows dropping to 25°C (77°F). Be prepared for the 315 mm (12.4 in) of rainfall spread across 25 days, contributing to the high average humidity of 85%. Ideal for those who enjoy a tropical climate!

September Temperature in San Isidro

In September in San Isidro, the average temperature is 28°C (83°F), with a maximum reaching 33°C (92°F) and a minimum dipping as low as 25°C (77°F). This makes it a perfect time to enjoy outdoor activities and explore the beautiful surroundings.

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

The chart illustrates September temperature patterns in San Isidro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Isidro, September typically has an average temperature of 28°C (83°F), with highs reaching up to 33°C (92°F) and lows dropping to around 25°C (77°F).

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

September Precipitation in San Isidro

In San Isidro in September, the precipitation amount is 315 mm (12.4 in) during 25 days, indicating a relatively wet period for the region.

September Precipitation Trends in San Isidro

The chart displays monthly precipitation patterns in San Isidro, 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 Isidro, September typically receives around 315 mm (12.4 inches) of precipitation spread over approximately 25 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 San Isidro

In San Isidro in September humidity is 85%. With an average temperature of 28°C (83°F), this humidity feels like an enveloping blanket, making traveling quite sticky and exhausting, as the air thickens and makes every movement feel laborious.

September Average Humidity in San Isidro

This chart illustrates the average monthly humidity levels in San Isidro, 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 Isidro is approximately 85%, 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 San Isidro

In San Isidro 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 San Isidro, you can check here.

Maximum UV Index Levels in San Isidro for September

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

Data source: San Isidro 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 Isidro Compares to Other Months

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

This table compares monthly weather conditions in San Isidro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	105 mm (4.1 inches)	78%	extreme
February Weather	26°C (79°F)	74 mm (2.9 inches)	75%	extreme
March Weather	27°C (81°F)	51 mm (2.0 inches)	74%	extreme
April Weather	28°C (83°F)	47 mm (1.8 inches)	76%	extreme
May Weather	29°C (84°F)	151 mm (6.0 inches)	76%	extreme
June Weather	29°C (84°F)	219 mm (8.6 inches)	81%	extreme
July Weather	28°C (83°F)	313 mm (12.3 inches)	84%	extreme
August Weather	28°C (83°F)	242 mm (9.5 inches)	85%	extreme
September Weather	28°C (83°F)	315 mm (12.4 inches)	85%	extreme
October Weather	28°C (82°F)	252 mm (9.9 inches)	82%	extreme
November Weather	27°C (82°F)	197 mm (7.8 inches)	85%	extreme
December Weather	27°C (80°F)	215 mm (8.4 inches)	86%	extreme