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September Weather in San Nicolas, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Nicolas, Mexico hovers around 29°C (84°F). Temperatures can vary significantly, with a minimum of 20°C (68°F) and soaring to a maximum of 41°C (107°F). Prepare for wet days as the region experiences around 173 mm (6.8 in) of precipitation over 18 days, with an average humidity of 84%, making it a truly tropical experience!

September Temperature in San Nicolas

In September, in San Nicolas, the average temperature is 29°C (84°F). Maximum temperatures can reach 41°C (107°F), while minimum temperatures can drop to as low as 20°C (68°F). This climate makes San Nicolas a great destination for travelers seeking warm weather and outdoor activities.

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

The chart illustrates September temperature patterns in San Nicolas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Nicolas, September typically has an average temperature of 29°C (84°F), with highs reaching up to 41°C (107°F) and lows dropping to around 20°C (68°F).
JanFebMarAprMayJunJulAugSepOctNovDec687277838685858683797470
Data source: Temperature data for San Nicolas 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 Nicolas

In San Nicolas in September, the precipitation amount is 173 mm (6.8 in) over the course of 18 days.

September Precipitation Trends in San Nicolas

The chart displays monthly precipitation patterns in San Nicolas, 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 Nicolas, September typically receives around 173 mm (6.8 inches) of precipitation spread over approximately 18 days.
JanFebMarAprMayJunJulAugSepOctNovDec51263645911631351261732014122
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Nicolas

In San Nicolas in September, humidity is 84%. With an average temperature of 29°C (84°F), this humidity feels like a warm blanket enveloping you, making travel sticky and somewhat stifling, yet invigorating, as every step is accompanied by a gentle, humid embrace.

September Average Humidity in San Nicolas

This chart illustrates the average monthly humidity levels in San Nicolas, 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 Nicolas is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Nicolas

In San Nicolas 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 San Nicolas.

Maximum UV Index Levels in San Nicolas for September

The chart shows the monthly maximum UV Index (UVI) for San Nicolas 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 Nicolas typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79121212121312121187
Data source: San Nicolas 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 Nicolas Compares to Other Months

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

This table compares monthly weather conditions in San Nicolas, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (68°F)51 mm (2.0 inches)88%high
February Weather22°C (72°F)26 mm (1.0 inches)86%very high
March Weather25°C (77°F)36 mm (1.4 inches)83%extreme
April Weather28°C (83°F)45 mm (1.8 inches)80%extreme
May Weather30°C (87°F)91 mm (3.6 inches)82%extreme
June Weather30°C (86°F)163 mm (6.4 inches)79%extreme
July Weather30°C (86°F)135 mm (5.3 inches)72%extreme
August Weather30°C (86°F)125 mm (4.9 inches)74%extreme
September Weather29°C (84°F)173 mm (6.8 inches)84%extreme
October Weather26°C (80°F)201 mm (7.9 inches)92%extreme
November Weather23°C (74°F)41 mm (1.6 inches)91%very high
December Weather21°C (70°F)22 mm (0.8 inches)91%high

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