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September Weather in San Isidro, Philippines

Last updated: August 27, 2025

In September, the average temperature in San Isidro, Philippines reaches a warm 28°C (82°F), with minimums dipping to 24°C (75°F) and maximums soaring up to 33°C (91°F). Expect a fair amount of rain, with 318 mm (12.5 in) of precipitation spread over 27 days. With an average humidity of 88%, prepare for a tropical experience!

September Temperature in San Isidro

In September in San Isidro, the average temperature is 28°C (82°F), with maximums reaching up to 33°C (91°F) and minimums dipping as low as 24°C (75°F). This warm weather makes it an ideal time for travelers seeking a sunny getaway.

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 (82°F), with highs reaching up to 33°C (91°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec797980828383828282818180
Data source: Temperature data for San Isidro 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 Isidro

In San Isidro in September, the total precipitation amount is 318 mm (12.5 in) spread over 27 days.

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 318 mm (12.5 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec2091007977139253382340318262218274
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Isidro

In San Isidro in September humidity is 88%. With an average temperature of 28°C (82°F), this humidity feels like walking through a warm, heavy blanket that clings to your skin, making even the simplest activities feel exhausting and necessitating frequent breaks in the shade.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%78%77%79%83%86%87%87%88%85%89%89%
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 reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Isidro.

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 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111315151414141415131111
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.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)209 mm (8.2 inches)82%extreme
February Weather26°C (79°F)100 mm (3.9 inches)78%extreme
March Weather27°C (80°F)79 mm (3.1 inches)77%extreme
April Weather28°C (82°F)77 mm (3.0 inches)79%extreme
May Weather28°C (83°F)139 mm (5.5 inches)83%extreme
June Weather28°C (83°F)253 mm (9.9 inches)86%extreme
July Weather28°C (82°F)382 mm (15.0 inches)87%extreme
August Weather28°C (82°F)340 mm (13.4 inches)87%extreme
September Weather28°C (82°F)318 mm (12.5 inches)88%extreme
October Weather27°C (82°F)262 mm (10.3 inches)85%extreme
November Weather27°C (81°F)218 mm (8.6 inches)89%extreme
December Weather27°C (80°F)274 mm (10.8 inches)89%extreme

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