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September Weather in San Antonio, Philippines

Last updated: August 27, 2025

In September, the average temperature in San Antonio, Philippines is a warm 27°C (82°F). While the temperature can dip to a comfortable 25°C (77°F), it can also reach a pleasant 30°C (86°F). Residents and visitors should prepare for some rain, as 290 mm (11.4 in) of precipitation typically falls over 24 days. With an average humidity of 88%, the air is undoubtedly tropical, making it essential to stay hydrated!

September Temperature in San Antonio

In September in San Antonio, the average temperature is 27°C (82°F). Maximums can reach 30°C (86°F), while minimums can drop to as low as 25°C (77°F). Overall, it's a warm and pleasant destination for travel, perfect for enjoying outdoor activities.

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

The chart illustrates September temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, September typically has an average temperature of 27°C (82°F), with highs reaching up to 30°C (86°F) and lows dropping to around 25°C (77°F).
JanFebMarAprMayJunJulAugSepOctNovDec797879808282818281818180
Data source: Temperature data for San Antonio 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 Antonio

In San Antonio in September, the precipitation amount is 290 mm (11.4 in) over a span of 24 days.

September Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, 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 Antonio, September typically receives around 290 mm (11.4 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec227129919090191333272290242196359
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Antonio

In San Antonio in September humidity is 88%. With an average temperature of 27°C (82°F), this humidity feels like a warm, enveloping blanket that can be quite discomforting for traveling, leaving you drenched in sweat and longing for a cool breeze.

September Average Humidity in San Antonio

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

In San Antonio 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 Antonio.

Maximum UV Index Levels in San Antonio for September

The chart shows the monthly maximum UV Index (UVI) for San Antonio 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 Antonio typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121315161414141415131111
Data source: San Antonio 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 Antonio Compares to Other Months

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

This table compares monthly weather conditions in San Antonio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)227 mm (8.9 inches)82%extreme
February Weather26°C (78°F)129 mm (5.1 inches)78%extreme
March Weather26°C (79°F)91 mm (3.6 inches)77%extreme
April Weather27°C (81°F)90 mm (3.5 inches)79%extreme
May Weather28°C (82°F)90 mm (3.6 inches)83%extreme
June Weather28°C (82°F)191 mm (7.5 inches)86%extreme
July Weather27°C (81°F)333 mm (13.1 inches)87%extreme
August Weather28°C (82°F)271 mm (10.7 inches)87%extreme
September Weather27°C (82°F)290 mm (11.4 inches)88%extreme
October Weather27°C (81°F)242 mm (9.5 inches)85%extreme
November Weather27°C (81°F)196 mm (7.7 inches)89%extreme
December Weather26°C (80°F)359 mm (14.1 inches)89%extreme

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