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September Weather in San Ildefonso, Philippines

Last updated: August 27, 2025

In September, the average temperature in San Ildefonso, Philippines hovers around 27°C (81°F), with minimums reaching 23°C (74°F) and maximums climbing to 32°C (90°F). Expect significant rainfall, with an average precipitation of 378 mm (14.9 in) over 28 days, while the air maintains a high humidity level of 87%.

September Temperature in San Ildefonso

In September in San Ildefonso, 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 Ildefonso a great destination for travelers looking to enjoy warm and comfortable weather.

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

The chart illustrates September temperature patterns in San Ildefonso, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Ildefonso, 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).
JanFebMarAprMayJunJulAugSepOctNovDec787880818282818080818179
Data source: Temperature data for San Ildefonso 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 Ildefonso

In San Ildefonso in September, the total precipitation amount is 378 mm (14.9 in) over a period of 28 days.

September Precipitation Trends in San Ildefonso

The chart displays monthly precipitation patterns in San Ildefonso, 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 Ildefonso, September typically receives around 378 mm (14.9 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec4826204216139859261037925011548
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Ildefonso

In San Ildefonso in September, humidity is 87%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, damp blanket, making traveling feel heavy and exhausting.

September Average Humidity in San Ildefonso

This chart illustrates the average monthly humidity levels in San Ildefonso, 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 Ildefonso is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%73%71%73%77%85%86%87%87%86%89%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Ildefonso

In San Ildefonso 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 Ildefonso, you can check here.

Maximum UV Index Levels in San Ildefonso for September

The chart shows the monthly maximum UV Index (UVI) for San Ildefonso 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 Ildefonso typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414131314141413109
Data source: San Ildefonso 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 Ildefonso Compares to Other Months

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

This table compares monthly weather conditions in San Ildefonso, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)48 mm (1.9 inches)77%very high
February Weather25°C (78°F)26 mm (1.0 inches)73%extreme
March Weather26°C (80°F)20 mm (0.8 inches)71%extreme
April Weather27°C (81°F)41 mm (1.6 inches)73%extreme
May Weather28°C (82°F)161 mm (6.3 inches)77%extreme
June Weather28°C (82°F)398 mm (15.7 inches)85%extreme
July Weather27°C (81°F)592 mm (23.3 inches)86%extreme
August Weather27°C (80°F)610 mm (24.0 inches)87%extreme
September Weather27°C (81°F)378 mm (14.9 inches)87%extreme
October Weather27°C (81°F)250 mm (9.8 inches)86%extreme
November Weather27°C (81°F)115 mm (4.5 inches)89%very high
December Weather26°C (79°F)48 mm (1.9 inches)85%very high

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