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September Weather in San Sebastian Etla, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Sebastian Etla, Mexico hovers around 17°C (63°F), with lows dipping to 9°C (48°F) and highs reaching up to 27°C (81°F). Expect a fair share of rainfall, averaging 287 mm (11.3 in) over 22 days, and don’t forget the high humidity, which typically sits at 84%.

September Temperature in San Sebastian Etla

In September in San Sebastian Etla, the average temperature is 17°C (63°F). Maximum can reach 27°C (81°F), and the minimum can be as low as 9°C (48°F). This pleasant climate makes San Sebastian Etla an ideal destination for travelers seeking mild and comfortable weather.

September Weather in San Sebastian Etla: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Sebastian Etla, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Sebastian Etla, September typically has an average temperature of 17°C (63°F), with highs reaching up to 27°C (81°F) and lows dropping to around 9°C (48°F).
JanFebMarAprMayJunJulAugSepOctNovDec586163656664636363625958
Data source: Temperature data for San Sebastian Etla 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 San Sebastian Etla

In San Sebastian Etla in September, the precipitation amount is 287 mm (11.3 in) over the course of 22 days.

September Precipitation Trends in San Sebastian Etla

The chart displays monthly precipitation patterns in San Sebastian Etla, 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 San Sebastian Etla, September typically receives around 287 mm (11.3 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec54113075261128246288146205
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Sebastian Etla

In San Sebastian Etla in September, humidity is 84%. With an average temperature of 17°C (63°F), this humidity feels like a warm, sticky embrace that can make traveling feel heavy and cumbersome, often leaving visitors yearning for refreshing breezes and shade.

September Average Humidity in San Sebastian Etla

This chart illustrates the average monthly humidity levels in San Sebastian Etla, 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 San Sebastian Etla is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%80%73%67%72%73%76%80%84%89%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Sebastian Etla

In San Sebastian Etla 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 San Sebastian Etla, you can check here.

Maximum UV Index Levels in San Sebastian Etla for September

The chart shows the monthly maximum UV Index (UVI) for San Sebastian Etla 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 San Sebastian Etla typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10131515151515141413119
Data source: San Sebastian Etla 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 San Sebastian Etla Compares to Other Months

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

This table compares monthly weather conditions in San Sebastian Etla, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (58°F)5 mm (0.2 inches)84%very high
February Weather16°C (61°F)4 mm (0.2 inches)80%extreme
March Weather17°C (64°F)11 mm (0.4 inches)73%extreme
April Weather19°C (66°F)30 mm (1.2 inches)67%extreme
May Weather19°C (67°F)75 mm (2.9 inches)72%extreme
June Weather18°C (64°F)260 mm (10.3 inches)73%extreme
July Weather17°C (63°F)128 mm (5.0 inches)76%extreme
August Weather17°C (63°F)246 mm (9.7 inches)80%extreme
September Weather17°C (63°F)287 mm (11.3 inches)84%extreme
October Weather17°C (62°F)146 mm (5.8 inches)89%extreme
November Weather15°C (60°F)20 mm (0.8 inches)88%extreme
December Weather14°C (58°F)5 mm (0.2 inches)88%very high

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