October Weather in Santiago, Mexico

Last updated: August 27, 2025

In October, the average temperature in Santiago, Mexico is a warm 27°C (81°F), with daily highs reaching up to 36°C (96°F) and lows dropping to 20°C (68°F). Be prepared for a damp atmosphere, as this month sees an average precipitation of 226 mm (8.9 in) over nearly 21 days and a high humidity level of 90%.

October Temperature in Santiago

In October in Santiago, the average temperature is 27°C (81°F), with maximums that can reach 36°C (96°F) and minimums that can drop as low as 20°C (68°F). This pleasant climate makes Santiago an ideal destination for outdoor activities and exploration during this time.

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

The chart illustrates October 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, October typically has an average temperature of 27°C (81°F), with highs reaching up to 36°C (96°F) and lows dropping to around 20°C (68°F).

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

October Precipitation in Santiago

In Santiago in October, the total precipitation amount is 226 mm (8.9 in) over the course of 21 days.

October Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Santiago, October typically receives around 226 mm (8.9 inches) of precipitation spread over approximately 21 days.

Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

October Humidity in Santiago

In Santiago in October, humidity is 90%. With an average temperature of 27°C (81°F), this humidity feels like walking through a heavy fog, making outdoor activities uncomfortable and exhausting, and leaving travelers drenched in sweat within minutes.

October Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Santiago is approximately 90%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Santiago

In Santiago in October, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Santiago.

Maximum UV Index Levels in Santiago for October

The chart shows the monthly maximum UV Index (UVI) for Santiago in October, 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 October, the maximum UV index in Santiago typically reaches 11, which falls under the extreme exposure category.

Data source: Santiago October 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 October 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 October’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 October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (73°F)	42 mm (1.7 inches)	88%	very high
February Weather	24°C (75°F)	41 mm (1.6 inches)	86%	extreme
March Weather	26°C (78°F)	25 mm (1.0 inches)	84%	extreme
April Weather	28°C (83°F)	23 mm (0.9 inches)	81%	extreme
May Weather	30°C (86°F)	58 mm (2.3 inches)	82%	extreme
June Weather	29°C (84°F)	285 mm (11.2 inches)	81%	extreme
July Weather	28°C (83°F)	221 mm (8.7 inches)	81%	extreme
August Weather	28°C (83°F)	230 mm (9.0 inches)	82%	extreme
September Weather	28°C (83°F)	313 mm (12.3 inches)	86%	extreme
October Weather	27°C (81°F)	226 mm (8.9 inches)	90%	extreme
November Weather	25°C (77°F)	108 mm (4.2 inches)	91%	very high
December Weather	23°C (74°F)	38 mm (1.5 inches)	91%	very high