September Weather in Santiago, Philippines

Last updated: August 27, 2025

In Santiago, Philippines, the average temperature in September hovers around 28°C (82°F), with daily fluctuations ranging from a minimum of 22°C (73°F) to a maximum of 36°C (98°F). During this time, expect 194 mm (7.7 in) of precipitation spread over 23 days, contributing to a high average humidity of 87%. Be prepared for a warm and humid experience!

September Temperature in Santiago

In September in Santiago, the average temperature is 28°C (82°F), with maximums reaching up to 36°C (98°F) and minimums dropping as low as 22°C (73°F). This pleasant climate makes it an ideal time for travelers seeking warmth and outdoor adventures.

September Weather in Santiago: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago, September typically has an average temperature of 28°C (82°F), with highs reaching up to 36°C (98°F) and lows dropping to around 22°C (73°F).

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

September Precipitation in Santiago

In Santiago in September, the total precipitation amount is 194 mm (7.7 in) over the course of 23 days.

September Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, 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 Santiago, September typically receives around 194 mm (7.7 inches) of precipitation spread over approximately 23 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 Santiago

In Santiago in September humidity is 87%. With an average temperature of 28°C (82°F), this humidity feels like a warm, thick blanket wrapping around you, making travel challenging as you navigate the air's heavy moisture.

September Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, 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 Santiago is approximately 87%, 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 Santiago

In Santiago 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 Santiago, you can check here.

Maximum UV Index Levels in Santiago for September

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

Data source: Santiago 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 Santiago Compares to Other Months

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

This table compares monthly weather conditions in Santiago, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	24°C (75°F)	119 mm (4.7 inches)	77%	extreme
February Weather	24°C (75°F)	77 mm (3.0 inches)	73%	extreme
March Weather	26°C (79°F)	74 mm (2.9 inches)	71%	extreme
April Weather	27°C (81°F)	46 mm (1.8 inches)	73%	extreme
May Weather	29°C (85°F)	173 mm (6.8 inches)	77%	extreme
June Weather	30°C (86°F)	107 mm (4.2 inches)	85%	extreme
July Weather	29°C (84°F)	241 mm (9.5 inches)	86%	extreme
August Weather	29°C (84°F)	200 mm (7.9 inches)	87%	extreme
September Weather	28°C (82°F)	194 mm (7.7 inches)	87%	extreme
October Weather	27°C (81°F)	192 mm (7.6 inches)	86%	extreme
November Weather	26°C (79°F)	193 mm (7.6 inches)	89%	very high
December Weather	25°C (77°F)	185 mm (7.3 inches)	85%	very high