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October Weather in Santiago, Mexico

Last updated: August 27, 2025

In October, the average temperature in Santiago, Mexico is a pleasant 17°C (62°F). However, be prepared for a range: it can dip to a chilly 3°C (38°F) and occasionally reach a warm 27°C (82°F). Expect some rain, with 50 mm (2.0 in) of precipitation spread over 9 days, and a high average humidity of 85%.

October Temperature in Santiago

In October in Santiago, the average temperature is 17°C (62°F), with maximums reaching up to 27°C (82°F) and minimums dipping as low as 3°C (38°F). This makes it an ideal time for travelers seeking mild weather and varied outdoor activities.

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 17°C (62°F), with highs reaching up to 27°C (82°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec545863677068666764625854
Data source: Temperature data for Santiago 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.

October Precipitation in Santiago

In Santiago in October, the precipitation amount is 50 mm (2.0 in) over the course of 9 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 50 mm (2.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1210131041998956100501510
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Santiago

In Santiago in October humidity is 85%. With an average temperature of 17°C (62°F), this humidity feels like a warm, heavy blanket enveloping you, making travel somewhat uncomfortable as you navigate the thick, moist air that clings to your skin and slows your pace.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%69%65%64%75%78%67%64%82%86%87%87%
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 is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, 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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9111415151414141412108
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.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)12 mm (0.5 inches)75%very high
February Weather15°C (59°F)10 mm (0.4 inches)69%extreme
March Weather17°C (63°F)13 mm (0.5 inches)65%extreme
April Weather19°C (67°F)10 mm (0.4 inches)64%extreme
May Weather21°C (70°F)41 mm (1.6 inches)75%extreme
June Weather20°C (68°F)99 mm (3.9 inches)78%extreme
July Weather19°C (67°F)89 mm (3.5 inches)67%extreme
August Weather19°C (67°F)56 mm (2.2 inches)64%extreme
September Weather18°C (65°F)100 mm (3.9 inches)81%extreme
October Weather17°C (62°F)50 mm (2.0 inches)85%extreme
November Weather14°C (58°F)14 mm (0.6 inches)87%very high
December Weather12°C (55°F)10 mm (0.4 inches)87%very high

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