September Weather in Vallenar, Chile

Last updated: August 22, 2025

In September, the average temperature in Vallenar, Chile hovers around 14°C (58°F), with temperatures ranging from a chilly 3°C (38°F) to a warm 28°C (83°F). Expect minimal precipitation, averaging just 1 mm (0.0 in) over the course of the month, and enjoy a comfortable average humidity level of 52%. Perfect weather for exploring!

September Temperature in Vallenar

In September in Vallenar, the average temperature is 14°C (58°F). Maximums can reach 28°C (83°F), and minimums can be as low as 3°C (38°F). This range makes it an ideal time for travelers to enjoy a variety of outdoor activities while also being prepared for cooler evenings.

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

The chart illustrates September temperature patterns in Vallenar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Vallenar, September typically has an average temperature of 14°C (58°F), with highs reaching up to 28°C (83°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Vallenar

In Vallenar in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

September Precipitation Trends in Vallenar

The chart displays monthly precipitation patterns in Vallenar, 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 Vallenar, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 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 Vallenar

In Vallenar in September humidity is 52%. With an average temperature of 14°C (58°F), this humidity feels like a gentle embrace, making travel comfortable yet refreshing, perfect for exploring the sights without feeling overheated.

September Average Humidity in Vallenar

This chart illustrates the average monthly humidity levels in Vallenar, 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 Vallenar is approximately 52%, 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 Vallenar

In Vallenar in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Vallenar.

Maximum UV Index Levels in Vallenar for September

The chart shows the monthly maximum UV Index (UVI) for Vallenar 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 Vallenar typically reaches 9, which falls under the very high exposure category.

Data source: Vallenar 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 Vallenar Compares to Other Months

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

This table compares monthly weather conditions in Vallenar, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (69°F)	0 mm (0.0 inches)	56%	extreme
February Weather	20°C (69°F)	0 mm (0.0 inches)	59%	extreme
March Weather	19°C (66°F)	0 mm (0.0 inches)	63%	extreme
April Weather	17°C (62°F)	2 mm (0.1 inches)	61%	very high
May Weather	14°C (57°F)	9 mm (0.4 inches)	62%	high
June Weather	12°C (53°F)	14 mm (0.6 inches)	60%	moderate
July Weather	12°C (53°F)	2 mm (0.1 inches)	62%	high
August Weather	13°C (55°F)	2 mm (0.1 inches)	59%	high
September Weather	14°C (58°F)	1 mm (0.0 inches)	52%	very high
October Weather	16°C (62°F)	0 mm (0.0 inches)	48%	extreme
November Weather	18°C (64°F)	0 mm (0.0 inches)	46%	extreme
December Weather	19°C (66°F)	0 mm (0.0 inches)	47%	extreme