September Weather in Mendoza, Peru

Last updated: August 27, 2025

In Mendoza, Peru, the average temperature in September hovers around 14°C (58°F), with a minimum dipping to 6°C (43°F) and a maximum reaching up to 23°C (75°F). Expect about 79 mm (3.1 in) of precipitation over 19 days, accompanied by an average humidity of 42%. Plan accordingly to make the most of your time in this vibrant location!

September Temperature in Mendoza

In September in Mendoza, the average temperature is 14°C (58°F). Maximums can reach 23°C (75°F) and minimums can be as low as 6°C (43°F). This moderate climate makes Mendoza a great destination for travelers seeking comfortable weather for outdoor activities.

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

The chart illustrates September temperature patterns in Mendoza, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mendoza, September typically has an average temperature of 14°C (58°F), with highs reaching up to 23°C (75°F) and lows dropping to around 6°C (43°F).

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

September Precipitation in Mendoza

In Mendoza in September, the precipitation amount is 79 mm (3.1 in), occurring over the course of 19 days.

September Precipitation Trends in Mendoza

The chart displays monthly precipitation patterns in Mendoza, 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 Mendoza, September typically receives around 79 mm (3.1 inches) of precipitation spread over approximately 19 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 Mendoza

In Mendoza in September humidity is 42%. With an average temperature of 14°C (58°F), this humidity feels like a comfortable and refreshing environment for traveling, allowing for enjoyable explorations without the heaviness of muggy conditions.

September Average Humidity in Mendoza

This chart illustrates the average monthly humidity levels in Mendoza, 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 Mendoza is approximately 42%, 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 Mendoza

In Mendoza in September, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Mendoza.

Maximum UV Index Levels in Mendoza for September

The chart shows the monthly maximum UV Index (UVI) for Mendoza 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 Mendoza typically reaches 16, which falls under the extreme exposure category.

Data source: Mendoza 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 Mendoza Compares to Other Months

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

This table compares monthly weather conditions in Mendoza, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (60°F)	235 mm (9.2 inches)	83%	extreme
February Weather	16°C (61°F)	246 mm (9.7 inches)	81%	extreme
March Weather	15°C (60°F)	273 mm (10.7 inches)	88%	extreme
April Weather	15°C (59°F)	199 mm (7.8 inches)	85%	extreme
May Weather	15°C (59°F)	134 mm (5.3 inches)	78%	extreme
June Weather	14°C (58°F)	89 mm (3.5 inches)	62%	extreme
July Weather	13°C (56°F)	68 mm (2.7 inches)	44%	extreme
August Weather	14°C (57°F)	63 mm (2.5 inches)	38%	extreme
September Weather	14°C (58°F)	79 mm (3.1 inches)	42%	extreme
October Weather	15°C (59°F)	208 mm (8.2 inches)	58%	extreme
November Weather	16°C (61°F)	278 mm (10.9 inches)	69%	extreme
December Weather	16°C (61°F)	274 mm (10.8 inches)	82%	extreme