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September Weather in Acatlan, Mexico

Last updated: August 26, 2025

In Acatlan, Mexico, the average temperature in September hovers around 22°C (73°F), with minimums dipping to 17°C (63°F) and maximums soaring up to 32°C (89°F). Expect 277 mm (10.9 in) of precipitation spread over 27 days, resulting in a notably high average humidity of 82%. Get ready for a warm and humid month!

September Temperature in Acatlan

In September in Acatlan, the average temperature is 22°C (73°F). Maximums can reach 32°C (89°F), while minimums can dip as low as 17°C (63°F). This makes it a pleasant time to visit, perfect for outdoor activities and exploring the local attractions.

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

The chart illustrates September temperature patterns in Acatlan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Acatlan, September typically has an average temperature of 22°C (73°F), with highs reaching up to 32°C (89°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec697275777774737372737270
Data source: Temperature data for Acatlan generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Acatlan

In Acatlan in September, the precipitation amount is 277 mm (10.9 in) spread over 27 days, indicating a frequent but varied pattern of rainfall throughout the month.

September Precipitation Trends in Acatlan

The chart displays monthly precipitation patterns in Acatlan, 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 Acatlan, September typically receives around 277 mm (10.9 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec5541160226204291277145336
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Acatlan

In Acatlan in September, humidity is 82%. With an average temperature of 22°C (73°F), this humidity feels like a warm, heavy embrace, making traveling feel sticky and draining, but the tropical atmosphere also brings a lush vibrancy to the surroundings.

September Average Humidity in Acatlan

This chart illustrates the average monthly humidity levels in Acatlan, 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 Acatlan is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%61%59%62%73%78%79%82%82%79%72%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Acatlan

In Acatlan 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 Acatlan, you can check here.

Maximum UV Index Levels in Acatlan for September

The chart shows the monthly maximum UV Index (UVI) for Acatlan 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 Acatlan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141414141412109
Data source: Acatlan 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 Acatlan Compares to Other Months

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

This table compares monthly weather conditions in Acatlan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (69°F)5 mm (0.2 inches)65%very high
February Weather22°C (72°F)5 mm (0.2 inches)61%extreme
March Weather24°C (75°F)4 mm (0.2 inches)59%extreme
April Weather25°C (77°F)10 mm (0.4 inches)62%extreme
May Weather25°C (78°F)59 mm (2.3 inches)73%extreme
June Weather23°C (74°F)226 mm (8.9 inches)78%extreme
July Weather23°C (74°F)204 mm (8.0 inches)79%extreme
August Weather23°C (73°F)291 mm (11.5 inches)82%extreme
September Weather22°C (73°F)277 mm (10.9 inches)82%extreme
October Weather23°C (73°F)145 mm (5.7 inches)79%extreme
November Weather22°C (72°F)33 mm (1.3 inches)72%very high
December Weather21°C (70°F)6 mm (0.2 inches)70%very high

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