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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 mild 17°C (63°F), with daytime highs reaching up to 27°C (81°F) and cooler nights dipping to 8°C (47°F). Prepare for an average of 229 mm (9.0 in) of precipitation over 23 days, contributing to a high average humidity of 82%.

September Temperature in San Cayetano

In September in San Cayetano, the average temperature is 17°C (63°F), with maximums reaching 27°C (81°F) and minimums dropping as low as 8°C (47°F). This moderate climate makes it an ideal destination for travelers seeking pleasant weather and outdoor activities.

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 17°C (63°F), with highs reaching up to 27°C (81°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec565962646463626362625957
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 total precipitation amount is 229 mm (9.0 in), which falls over the course of 23 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 229 mm (9.0 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec86205311821314518522988215
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 82%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you—comfortable yet heavy, making outdoor activities more taxing and requiring frequent breaks for hydration.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%78%75%71%77%76%68%70%82%91%89%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 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 Cayetano.

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 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10131515151515141513119
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 Weather13°C (56°F)8 mm (0.3 inches)84%very high
February Weather15°C (59°F)6 mm (0.2 inches)78%extreme
March Weather17°C (62°F)20 mm (0.8 inches)75%extreme
April Weather18°C (64°F)53 mm (2.1 inches)70%extreme
May Weather18°C (65°F)118 mm (4.7 inches)77%extreme
June Weather17°C (63°F)213 mm (8.4 inches)76%extreme
July Weather17°C (62°F)145 mm (5.7 inches)68%extreme
August Weather17°C (63°F)185 mm (7.3 inches)70%extreme
September Weather17°C (63°F)229 mm (9.0 inches)82%extreme
October Weather16°C (62°F)88 mm (3.5 inches)91%extreme
November Weather15°C (59°F)21 mm (0.8 inches)89%extreme
December Weather14°C (57°F)5 mm (0.2 inches)88%very high

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