September Weather in Atacco, Mexico

Last updated: August 27, 2025

In September, the average temperature in Atacco, Mexico hovers around 19°C (66°F), with a minimum of 13°C (56°F) and a maximum soaring to 28°C (83°F). Be prepared for 347 mm (13.7 in) of precipitation spread over 26 days, making it a rather wet month. With an average humidity of 83%, the air will feel quite damp, adding to the charm of this vibrant destination.

September Temperature in Atacco

In September in Atacco, the average temperature is 19°C (66°F). Maximum temperatures can reach 28°C (83°F), while minimums can drop to 13°C (56°F). This mild climate makes Atacco an ideal destination for travelers seeking comfortable weather and outdoor activities.

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

The chart illustrates September temperature patterns in Atacco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atacco, September typically has an average temperature of 19°C (66°F), with highs reaching up to 28°C (83°F) and lows dropping to around 13°C (56°F).

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

September Precipitation in Atacco

In Atacco in September, the total precipitation amount is 347 mm (13.7 in) spread over 26 days.

September Precipitation Trends in Atacco

The chart displays monthly precipitation patterns in Atacco, 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 Atacco, September typically receives around 347 mm (13.7 inches) of precipitation spread over approximately 26 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 Atacco

In Atacco in September, humidity is 83%. With an average temperature of 19°C (66°F), this humidity feels like a heavy blanket wrapping around you, making travel feel more sluggish and muggy, yet there's a refreshing coolness in the air that invites you to explore.

September Average Humidity in Atacco

This chart illustrates the average monthly humidity levels in Atacco, 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 Atacco is approximately 83%, 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 Atacco

In Atacco in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Atacco, you can check here.

Maximum UV Index Levels in Atacco for September

The chart shows the monthly maximum UV Index (UVI) for Atacco 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 Atacco typically reaches 14, which falls under the extreme exposure category.

Data source: Atacco 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 Atacco Compares to Other Months

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

This table compares monthly weather conditions in Atacco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (60°F)	13 mm (0.5 inches)	70%	very high
February Weather	16°C (62°F)	21 mm (0.8 inches)	65%	extreme
March Weather	19°C (66°F)	7 mm (0.3 inches)	59%	extreme
April Weather	20°C (68°F)	3 mm (0.1 inches)	60%	extreme
May Weather	21°C (70°F)	46 mm (1.8 inches)	67%	extreme
June Weather	20°C (69°F)	231 mm (9.1 inches)	80%	extreme
July Weather	19°C (66°F)	420 mm (16.5 inches)	81%	extreme
August Weather	19°C (66°F)	383 mm (15.1 inches)	83%	extreme
September Weather	19°C (66°F)	347 mm (13.7 inches)	83%	extreme
October Weather	19°C (66°F)	145 mm (5.7 inches)	80%	extreme
November Weather	17°C (63°F)	38 mm (1.5 inches)	77%	very high
December Weather	15°C (60°F)	15 mm (0.6 inches)	76%	very high