August Weather in Santiago, Mexico

Last updated: August 27, 2025

In Santiago, Mexico during August, the average temperature hovers around 28°C (83°F). You can expect a comfortable minimum of 22°C (71°F) and the occasional peak at 37°C (100°F). With 131 mm (5.2 in) of precipitation spread over 16 days, it’s wise to prepare for some rainfall. The air is notably humid, with an average of 73%, adding to the tropical vibes of the month.

August Temperature in Santiago

In August in Santiago, the average temperature is 28°C (83°F), with maximums reaching up to 37°C (100°F) and minimums dropping as low as 22°C (71°F). It's an ideal time for travelers looking to enjoy warm weather and outdoor activities.

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

The chart illustrates August 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, August typically has an average temperature of 28°C (83°F), with highs reaching up to 37°C (100°F) and lows dropping to around 22°C (71°F).

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

August Precipitation in Santiago

In Santiago in August, the precipitation amount is 131 mm (5.2 in) during 16 days, indicating a relatively wet period for the region.

August Precipitation Trends in Santiago

The chart displays monthly precipitation patterns in Santiago, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Santiago, August typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 16 days.

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

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Millimeters (mm) Inches (in)

August Humidity in Santiago

In Santiago in August, humidity is 73%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket enveloping your skin, making travel feel heavy and stifling, often requiring frequent breaks in shaded or air-conditioned areas to stay comfortable.

August Average Humidity in Santiago

This chart illustrates the average monthly humidity levels in Santiago, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Santiago is approximately 73%, offering insight into how humid the weather typically is during this month.

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

August UV Index in Santiago

In Santiago in August, 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 August

The chart shows the monthly maximum UV Index (UVI) for Santiago in August, 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 August, the maximum UV index in Santiago typically reaches 12, which falls under the extreme exposure category.

Data source: Santiago August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (63°F)	10 mm (0.4 inches)	68%	high
February Weather	18°C (65°F)	14 mm (0.6 inches)	66%	very high
March Weather	20°C (69°F)	2 mm (0.1 inches)	65%	extreme
April Weather	23°C (73°F)	1 mm (0.0 inches)	63%	extreme
May Weather	25°C (77°F)	0 mm (0.0 inches)	63%	extreme
June Weather	28°C (83°F)	22 mm (0.9 inches)	66%	extreme
July Weather	28°C (84°F)	93 mm (3.7 inches)	71%	extreme
August Weather	28°C (83°F)	131 mm (5.2 inches)	73%	extreme
September Weather	26°C (80°F)	175 mm (6.9 inches)	74%	extreme
October Weather	25°C (78°F)	25 mm (1.0 inches)	73%	extreme
November Weather	22°C (72°F)	24 mm (0.9 inches)	71%	very high
December Weather	18°C (65°F)	14 mm (0.5 inches)	69%	high