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September Weather in San Luis Amatlan, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Luis Amatlan, Mexico is a pleasant 20°C (68°F). While temperatures can drop to a chilly 12°C (54°F), they can also soar to a warm 30°C (85°F). Expect 263 mm (10.4 in) of rainfall over approximately 22 days, contributing to a high average humidity of 84%.

September Temperature in San Luis Amatlan

In September in San Luis Amatlan, the average temperature is 20°C (68°F). Maximums can reach 30°C (85°F), while minimums can drop to as low as 12°C (54°F). This pleasant climate makes San Luis Amatlan an ideal destination for travelers seeking comfortable weather.

September Weather in San Luis Amatlan: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Luis Amatlan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Luis Amatlan, September typically has an average temperature of 20°C (68°F), with highs reaching up to 30°C (85°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec636669727369686868676563
Data source: Temperature data for San Luis Amatlan 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 Luis Amatlan

In San Luis Amatlan in September, the total precipitation amount is 263 mm (10.4 in), occurring over the course of 22 days.

September Precipitation Trends in San Luis Amatlan

The chart displays monthly precipitation patterns in San Luis Amatlan, 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 Luis Amatlan, September typically receives around 263 mm (10.4 inches) of precipitation spread over approximately 22 days.
JanFebMarAprMayJunJulAugSepOctNovDec1128572431532362639985
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Luis Amatlan

In San Luis Amatlan in September humidity is 84%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket, making travel a challenge as the air clings to your skin, and every step feels heavier in the mugginess.

September Average Humidity in San Luis Amatlan

This chart illustrates the average monthly humidity levels in San Luis Amatlan, 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 Luis Amatlan 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 Luis Amatlan

In San Luis Amatlan in September, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Luis Amatlan.

Maximum UV Index Levels in San Luis Amatlan for September

The chart shows the monthly maximum UV Index (UVI) for San Luis Amatlan 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 Luis Amatlan typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec111315151515151415131110
Data source: San Luis Amatlan 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 Luis Amatlan Compares to Other Months

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

This table compares monthly weather conditions in San Luis Amatlan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (64°F)1 mm (0.0 inches)84%extreme
February Weather19°C (66°F)1 mm (0.0 inches)80%extreme
March Weather20°C (69°F)2 mm (0.1 inches)73%extreme
April Weather22°C (72°F)8 mm (0.3 inches)67%extreme
May Weather23°C (73°F)57 mm (2.2 inches)72%extreme
June Weather21°C (69°F)243 mm (9.6 inches)73%extreme
July Weather20°C (68°F)153 mm (6.0 inches)76%extreme
August Weather20°C (68°F)236 mm (9.3 inches)80%extreme
September Weather20°C (68°F)263 mm (10.4 inches)84%extreme
October Weather19°C (67°F)99 mm (3.9 inches)89%extreme
November Weather18°C (65°F)8 mm (0.3 inches)88%extreme
December Weather17°C (64°F)5 mm (0.2 inches)88%very high

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