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September Weather in Santiago Petlacala, Mexico

Last updated: August 27, 2025

In September, the average temperature in Santiago Petlacala, Mexico hovers around 18°C (65°F). Expect a comfortable range with minimums dipping to 11°C (53°F) and maximums reaching up to 28°C (82°F). However, be prepared for the rain, as 484 mm (19.0 in) of precipitation falls over 29 days, accompanied by an average humidity of 82%.

September Temperature in Santiago Petlacala

In September in Santiago Petlacala, the average temperature is 18°C (65°F), with maximums reaching up to 28°C (82°F) and minimums dropping as low as 11°C (53°F). This makes it an ideal time for travelers to enjoy mild weather and outdoor activities.

September Weather in Santiago Petlacala: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Santiago Petlacala, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santiago Petlacala, September typically has an average temperature of 18°C (65°F), with highs reaching up to 28°C (82°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec606264666665656565646361
Data source: Temperature data for Santiago Petlacala 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 Santiago Petlacala

In Santiago Petlacala in September, the precipitation amount is 484 mm (19.0 in) spread across 29 days.

September Precipitation Trends in Santiago Petlacala

The chart displays monthly precipitation patterns in Santiago Petlacala, 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 Santiago Petlacala, September typically receives around 484 mm (19.0 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec23529632023923694444842825529
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Santiago Petlacala

In Santiago Petlacala in September, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

September Average Humidity in Santiago Petlacala

This chart illustrates the average monthly humidity levels in Santiago Petlacala, 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 Santiago Petlacala 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 Santiago Petlacala

In Santiago Petlacala 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 Santiago Petlacala, you can check here.

Maximum UV Index Levels in Santiago Petlacala for September

The chart shows the monthly maximum UV Index (UVI) for Santiago Petlacala 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 Santiago Petlacala typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121415151414141412109
Data source: Santiago Petlacala 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 Santiago Petlacala Compares to Other Months

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

This table compares monthly weather conditions in Santiago Petlacala, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)23 mm (0.9 inches)65%very high
February Weather17°C (62°F)5 mm (0.2 inches)61%extreme
March Weather18°C (65°F)29 mm (1.1 inches)59%extreme
April Weather19°C (66°F)63 mm (2.5 inches)62%extreme
May Weather19°C (67°F)202 mm (8.0 inches)73%extreme
June Weather18°C (65°F)392 mm (15.4 inches)78%extreme
July Weather18°C (65°F)369 mm (14.5 inches)79%extreme
August Weather18°C (65°F)444 mm (17.5 inches)82%extreme
September Weather18°C (65°F)484 mm (19.0 inches)82%extreme
October Weather18°C (65°F)282 mm (11.1 inches)79%extreme
November Weather17°C (63°F)54 mm (2.1 inches)72%very high
December Weather16°C (61°F)29 mm (1.1 inches)70%very high

Compare Santiago Petlacala's Climate with Cities Worldwide