September Weather in Ancun, China

Last updated: August 23, 2025

In September, the average temperature in Ancun, China is a pleasant 18°C (64°F). However, temperatures can swing from a cool minimum of 9°C (49°F) to a warm maximum of 30°C (85°F). Visitors should be prepared for moderate precipitation, with about 219 mm (8.6 in) expected over 15 days. Additionally, the region experiences high humidity, averaging around 81%, making it essential to stay hydrated and comfortable!

September Temperature in Ancun

In September, in Ancun, the average temperature is 18°C (64°F). Maximums can reach 30°C (85°F), and minimums can drop as low as 9°C (49°F). It’s a great time to explore and enjoy outdoor activities in pleasant weather!

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

The chart illustrates September temperature patterns in Ancun, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ancun, September typically has an average temperature of 18°C (64°F), with highs reaching up to 30°C (85°F) and lows dropping to around 9°C (49°F).

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

September Precipitation in Ancun

In Ancun in September, the precipitation amount reaches 219 mm (8.6 in) over the course of 15 days.

September Precipitation Trends in Ancun

The chart displays monthly precipitation patterns in Ancun, 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 Ancun, September typically receives around 219 mm (8.6 inches) of precipitation spread over approximately 15 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 Ancun

In Ancun in September, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

September Average Humidity in Ancun

This chart illustrates the average monthly humidity levels in Ancun, 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 Ancun is approximately 81%, 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 Ancun

In Ancun in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Ancun.

Maximum UV Index Levels in Ancun for September

The chart shows the monthly maximum UV Index (UVI) for Ancun 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 Ancun typically reaches 10, which falls under the very high exposure category.

Data source: Ancun 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 Ancun Compares to Other Months

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

This table compares monthly weather conditions in Ancun, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	23 mm (0.9 inches)	79%	moderate
February Weather	2°C (36°F)	32 mm (1.2 inches)	82%	moderate
March Weather	8°C (47°F)	57 mm (2.2 inches)	88%	very high
April Weather	13°C (55°F)	85 mm (3.3 inches)	84%	very high
May Weather	17°C (63°F)	82 mm (3.2 inches)	77%	extreme
June Weather	21°C (70°F)	166 mm (6.5 inches)	82%	extreme
July Weather	23°C (74°F)	165 mm (6.5 inches)	85%	extreme
August Weather	23°C (73°F)	166 mm (6.5 inches)	83%	extreme
September Weather	18°C (64°F)	219 mm (8.6 inches)	81%	very high
October Weather	11°C (53°F)	115 mm (4.5 inches)	87%	very high
November Weather	6°C (43°F)	39 mm (1.5 inches)	86%	high
December Weather	0°C (33°F)	14 mm (0.6 inches)	84%	moderate