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September Weather in Guayalejo, Mexico

Last updated: August 27, 2025

In September, the average temperature in Guayalejo, Mexico hovers around 29°C (84°F), with a minimum of 21°C (70°F) and peaks reaching up to 40°C (104°F). Expect significant rainfall, totaling 113 mm (4.5 in) over 20 days, accompanied by an average humidity of 80%. Prepare for a warm and wet month!

September Temperature in Guayalejo

In September in Guayalejo, the average temperature is 29°C (84°F). The maximum can reach 40°C (104°F) and the minimum can be as low as 21°C (70°F). Travelers should prepare for warm weather and stay hydrated while exploring this vibrant destination.

September Weather in Guayalejo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Guayalejo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Guayalejo, September typically has an average temperature of 29°C (84°F), with highs reaching up to 40°C (104°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec687276818586858684807470
Data source: Temperature data for Guayalejo 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 Guayalejo

In Guayalejo in September, the total precipitation amount reaches 113 mm (4.5 in) over a span of 20 days.

September Precipitation Trends in Guayalejo

The chart displays monthly precipitation patterns in Guayalejo, 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 Guayalejo, September typically receives around 113 mm (4.5 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec3115262058139139921131052411
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Guayalejo

In Guayalejo in September, humidity is 80%. With an average temperature of 29°C (84°F), this humidity feels like a warm blanket enveloping you, making travel feel sticky and heavy, as sweat clings to your skin and every step requires extra effort.

September Average Humidity in Guayalejo

This chart illustrates the average monthly humidity levels in Guayalejo, 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 Guayalejo is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%83%84%85%79%71%72%80%85%88%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Guayalejo

In Guayalejo in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Guayalejo.

Maximum UV Index Levels in Guayalejo for September

The chart shows the monthly maximum UV Index (UVI) for Guayalejo 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 Guayalejo typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79121212121312121086
Data source: Guayalejo 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 Guayalejo Compares to Other Months

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

This table compares monthly weather conditions in Guayalejo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (69°F)31 mm (1.2 inches)87%high
February Weather22°C (72°F)15 mm (0.6 inches)85%very high
March Weather25°C (77°F)26 mm (1.0 inches)83%extreme
April Weather27°C (82°F)20 mm (0.8 inches)84%extreme
May Weather30°C (86°F)58 mm (2.3 inches)85%extreme
June Weather30°C (86°F)139 mm (5.5 inches)79%extreme
July Weather30°C (85°F)139 mm (5.5 inches)71%extreme
August Weather30°C (86°F)92 mm (3.6 inches)72%extreme
September Weather29°C (84°F)113 mm (4.5 inches)80%extreme
October Weather27°C (80°F)105 mm (4.1 inches)85%very high
November Weather23°C (74°F)24 mm (0.9 inches)88%very high
December Weather21°C (71°F)11 mm (0.4 inches)89%high

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