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September Weather in San Rafael, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Rafael, Mexico is a pleasant 18°C (65°F), with minimums dipping to 11°C (52°F) and maximums reaching up to 28°C (82°F). Expect a significant precipitation amount of 454 mm (17.9 in) across 29 days, contributing to an overall average humidity level of 82%. Enjoy the balmy climate, but don’t forget your umbrella!

September Temperature in San Rafael

In September in San Rafael, the average temperature is 18°C (65°F). The maximum can reach 28°C (82°F), while the minimum can be as low as 11°C (52°F). This mild climate makes it an ideal time for exploring and enjoying outdoor activities.

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

The chart illustrates September temperature patterns in San Rafael, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Rafael, September typically has an average temperature of 18°C (65°F), with highs reaching up to 28°C (82°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec616365666665656565656462
Data source: Temperature data for San Rafael 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 Rafael

In San Rafael in September, the total precipitation amount is 454 mm (17.9 in), occurring over a period of 29 days.

September Precipitation Trends in San Rafael

The chart displays monthly precipitation patterns in San Rafael, 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 Rafael, September typically receives around 454 mm (17.9 inches) of precipitation spread over approximately 29 days.
JanFebMarAprMayJunJulAugSepOctNovDec25826531803653524194542685934
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Rafael

In San Rafael in September, humidity is 82%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can quickly leave travelers feeling fatigued and in need of frequent breaks to stay refreshed and hydrated.

September Average Humidity in San Rafael

This chart illustrates the average monthly humidity levels in San Rafael, 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 Rafael is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec65%61%59%62%73%78%79%82%82%79%72%70%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Rafael

In San Rafael 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 Rafael, you can check here.

Maximum UV Index Levels in San Rafael for September

The chart shows the monthly maximum UV Index (UVI) for San Rafael 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 Rafael typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121415151414141412109
Data source: San Rafael 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 Rafael Compares to Other Months

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

This table compares monthly weather conditions in San Rafael, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)25 mm (1.0 inches)65%very high
February Weather17°C (63°F)8 mm (0.3 inches)61%extreme
March Weather18°C (65°F)26 mm (1.0 inches)59%extreme
April Weather19°C (66°F)53 mm (2.1 inches)62%extreme
May Weather19°C (67°F)180 mm (7.1 inches)73%extreme
June Weather18°C (65°F)365 mm (14.4 inches)78%extreme
July Weather18°C (65°F)352 mm (13.9 inches)79%extreme
August Weather18°C (65°F)419 mm (16.5 inches)82%extreme
September Weather18°C (65°F)454 mm (17.9 inches)82%extreme
October Weather18°C (65°F)268 mm (10.6 inches)79%extreme
November Weather18°C (64°F)58 mm (2.3 inches)72%very high
December Weather17°C (62°F)34 mm (1.3 inches)70%very high

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