September Weather in Cartagena, Chile

Last updated: August 22, 2025

In Cartagena, Chile, the average temperature in September hovers around 11°C (53°F), with a minimum of 5°C (40°F) and a maximum reaching 22°C (72°F). Expect a modest precipitation of 16 mm (0.6 in) over 2 days, and enjoy relatively comfortable conditions with an average humidity of 56%.

September Temperature in Cartagena

In September in Cartagena, the average temperature is 11°C (53°F). Maximums can reach 22°C (72°F), and minimums can be as low as 5°C (40°F). Pack layers to stay comfortable during your travels!

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

The chart illustrates September temperature patterns in Cartagena, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cartagena, September typically has an average temperature of 11°C (53°F), with highs reaching up to 22°C (72°F) and lows dropping to around 5°C (40°F).

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

September Precipitation in Cartagena

In Cartagena in September, the precipitation amount is 16 mm (0.6 in) over a period of 2 days.

September Precipitation Trends in Cartagena

The chart displays monthly precipitation patterns in Cartagena, 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 Cartagena, September typically receives around 16 mm (0.6 inches) of precipitation spread over approximately 2 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 Cartagena

In Cartagena in September humidity is 56%. With an average temperature of 11°C (53°F), this humidity feels like a cool, crisp embrace that invigorates your senses while traveling, making each breath refreshing yet slightly heavy in the air, ideal for exploring without feeling overheated.

September Average Humidity in Cartagena

This chart illustrates the average monthly humidity levels in Cartagena, 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 Cartagena is approximately 56%, 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 Cartagena

In Cartagena in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Cartagena.

Maximum UV Index Levels in Cartagena for September

The chart shows the monthly maximum UV Index (UVI) for Cartagena 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 Cartagena typically reaches 8, which falls under the very high exposure category.

Data source: Cartagena 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 Cartagena Compares to Other Months

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

This table compares monthly weather conditions in Cartagena, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	17°C (62°F)	6 mm (0.2 inches)	41%	extreme
February Weather	17°C (62°F)	3 mm (0.1 inches)	41%	extreme
March Weather	16°C (60°F)	3 mm (0.1 inches)	46%	extreme
April Weather	14°C (57°F)	9 mm (0.4 inches)	52%	very high
May Weather	12°C (54°F)	43 mm (1.7 inches)	64%	moderate
June Weather	11°C (51°F)	107 mm (4.2 inches)	71%	moderate
July Weather	10°C (50°F)	47 mm (1.9 inches)	75%	moderate
August Weather	10°C (51°F)	38 mm (1.5 inches)	73%	high
September Weather	11°C (53°F)	16 mm (0.6 inches)	56%	very high
October Weather	13°C (55°F)	14 mm (0.6 inches)	61%	extreme
November Weather	15°C (59°F)	3 mm (0.1 inches)	52%	extreme
December Weather	16°C (61°F)	1 mm (0.0 inches)	39%	extreme