September Weather in Chaiten, Chile

Last updated: August 22, 2025

In September, the average temperature in Chaiten, Chile hovers around 7°C (45°F). Expect chilly nights with a minimum dipping to -4°C (25°F), while daytime can reach a pleasant 19°C (67°F). During this month, you can anticipate about 383 mm (15.1 in) of precipitation spread over roughly 21 days, contributing to a high average humidity of 86%. Make sure to pack accordingly!

September Temperature in Chaiten

In September in Chaiten, the average temperature is 7°C (45°F), with maximums reaching 19°C (67°F) and minimums dropping as low as -4°C (25°F). It's a time to pack layers, as the weather can vary significantly throughout the day.

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

The chart illustrates September temperature patterns in Chaiten, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chaiten, September typically has an average temperature of 7°C (45°F), with highs reaching up to 19°C (67°F) and lows dropping to around -4°C (25°F).

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

September Precipitation in Chaiten

In Chaiten in September, the total precipitation amount is 383 mm (15.1 in) occurring over a span of 21 days.

September Precipitation Trends in Chaiten

The chart displays monthly precipitation patterns in Chaiten, 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 Chaiten, September typically receives around 383 mm (15.1 inches) of precipitation spread over approximately 21 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Chaiten

In Chaiten in September, humidity is 86%. With an average temperature of 7°C (45°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration a bit uncomfortable and necessitating cozy layers to stay warm while navigating the moist air.

September Average Humidity in Chaiten

This chart illustrates the average monthly humidity levels in Chaiten, 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 Chaiten is approximately 86%, 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 Chaiten

In Chaiten in September, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Chaiten, you can refer to this Hourly UV Index in Chaiten.

Maximum UV Index Levels in Chaiten for September

The chart shows the monthly maximum UV Index (UVI) for Chaiten 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 Chaiten typically reaches 6, which falls under the high exposure category.

Data source: Chaiten 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 Chaiten Compares to Other Months

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

This table compares monthly weather conditions in Chaiten, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	251 mm (9.9 inches)	83%	extreme
February Weather	14°C (58°F)	187 mm (7.4 inches)	85%	extreme
March Weather	12°C (54°F)	306 mm (12.1 inches)	82%	very high
April Weather	10°C (51°F)	428 mm (16.8 inches)	87%	high
May Weather	8°C (47°F)	572 mm (22.5 inches)	87%	moderate
June Weather	6°C (43°F)	643 mm (25.3 inches)	86%	low
July Weather	5°C (42°F)	468 mm (18.4 inches)	87%	moderate
August Weather	6°C (43°F)	530 mm (20.9 inches)	87%	moderate
September Weather	7°C (45°F)	383 mm (15.1 inches)	86%	high
October Weather	8°C (47°F)	429 mm (16.9 inches)	84%	very high
November Weather	11°C (51°F)	381 mm (15.0 inches)	82%	extreme
December Weather	12°C (55°F)	318 mm (12.5 inches)	84%	extreme