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September Weather in Petacalco, Mexico

Last updated: August 27, 2025

The average temperature in Petacalco, Mexico during September is a warm 27°C (81°F), with minimums dipping to 24°C (75°F) and maximums soaring to 33°C (92°F). Expect a significant amount of precipitation at 265 mm (10.4 in) spread over 20 days, accompanied by a humidity level of 78%.

September Temperature in Petacalco

In September in Petacalco, the average temperature is 27°C (81°F), with maximums reaching 33°C (92°F) and minimums dropping to as low as 24°C (75°F). This climate makes Petacalco an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates September temperature patterns in Petacalco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Petacalco, September typically has an average temperature of 27°C (81°F), with highs reaching up to 33°C (92°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec777777777981838281818078
Data source: Temperature data for Petacalco 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 Petacalco

In Petacalco in September, the total precipitation amount is 265 mm (10.4 in) over the course of 20 days.

September Precipitation Trends in Petacalco

The chart displays monthly precipitation patterns in Petacalco, 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 Petacalco, September typically receives around 265 mm (10.4 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec42107188102250265234475
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Petacalco

In Petacalco in September humidity is 78%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy embrace that makes traveling feel both invigorating and exhausting. Moments spent outside can quickly become clammy and uncomfortable, urging travelers to seek shade and hydration as they explore.

September Average Humidity in Petacalco

This chart illustrates the average monthly humidity levels in Petacalco, 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 Petacalco is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%64%63%69%73%76%78%79%78%75%72%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Petacalco

In Petacalco in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Petacalco.

Maximum UV Index Levels in Petacalco for September

The chart shows the monthly maximum UV Index (UVI) for Petacalco 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 Petacalco typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141312131198
Data source: Petacalco 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 Petacalco Compares to Other Months

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

This table compares monthly weather conditions in Petacalco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather25°C (78°F)4 mm (0.2 inches)66%very high
February Weather25°C (77°F)2 mm (0.1 inches)64%extreme
March Weather25°C (78°F)1 mm (0.0 inches)63%extreme
April Weather25°C (78°F)0 mm (0.0 inches)69%extreme
May Weather26°C (80°F)7 mm (0.3 inches)73%extreme
June Weather27°C (81°F)188 mm (7.4 inches)76%extreme
July Weather28°C (83°F)102 mm (4.0 inches)78%extreme
August Weather28°C (82°F)250 mm (9.9 inches)79%extreme
September Weather27°C (81°F)265 mm (10.4 inches)78%extreme
October Weather27°C (81°F)234 mm (9.2 inches)75%extreme
November Weather27°C (80°F)47 mm (1.8 inches)72%very high
December Weather26°C (78°F)4 mm (0.2 inches)70%very high

Compare Petacalco's Climate with Cities Worldwide