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September Weather in San Cayetano, Mexico

Last updated: August 27, 2025

In San Cayetano, Mexico, the average temperature in September is a comfortable 20°C (68°F). Expect a minimum of 13°C (56°F) and a maximum of 28°C (82°F), making it a pleasant time to visit. However, be prepared for rain, as 286 mm (11.3 in) of precipitation can fall over 27 days. Don't forget that the average humidity sits at a high 87%, so dressing in layers and carrying an umbrella might be wise!

September Temperature in San Cayetano

In September in San Cayetano, the average temperature is 20°C (68°F). Maximums can reach 28°C (82°F), while minimums can drop to as low as 13°C (56°F). This pleasant climate makes it an ideal time for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in San Cayetano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Cayetano, September typically has an average temperature of 20°C (68°F), with highs reaching up to 28°C (82°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec616466697068686868676462
Data source: Temperature data for San Cayetano 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 Cayetano

In San Cayetano in September, the precipitation amount is 286 mm (11.3 in) over the course of 27 days.

September Precipitation Trends in San Cayetano

The chart displays monthly precipitation patterns in San Cayetano, 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 Cayetano, September typically receives around 286 mm (11.3 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec472525551723321442142862618649
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Cayetano

In San Cayetano in September, humidity is 87%. With an average temperature of 20°C (68°F), this humidity feels like a warm, thick blanket enveloping you, making travel feel a bit sluggish and requiring frequent breaks to stay refreshed.

September Average Humidity in San Cayetano

This chart illustrates the average monthly humidity levels in San Cayetano, 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 Cayetano is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%76%66%59%64%69%82%87%87%88%88%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Cayetano

In San Cayetano 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 Cayetano, you can check here.

Maximum UV Index Levels in San Cayetano for September

The chart shows the monthly maximum UV Index (UVI) for San Cayetano 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 Cayetano typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141414131412109
Data source: San Cayetano 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 Cayetano Compares to Other Months

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

This table compares monthly weather conditions in San Cayetano, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (62°F)47 mm (1.8 inches)83%very high
February Weather18°C (64°F)24 mm (1.0 inches)76%extreme
March Weather19°C (67°F)25 mm (1.0 inches)66%extreme
April Weather21°C (69°F)55 mm (2.2 inches)59%extreme
May Weather21°C (70°F)172 mm (6.8 inches)64%extreme
June Weather20°C (69°F)332 mm (13.1 inches)69%extreme
July Weather20°C (68°F)144 mm (5.7 inches)82%extreme
August Weather20°C (68°F)214 mm (8.4 inches)87%extreme
September Weather20°C (68°F)286 mm (11.3 inches)87%extreme
October Weather19°C (67°F)261 mm (10.3 inches)88%extreme
November Weather18°C (64°F)86 mm (3.4 inches)88%very high
December Weather17°C (62°F)49 mm (1.9 inches)88%very high

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