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September Weather in San Rafael, Mexico

Last updated: August 27, 2025

In San Rafael, Mexico, the average temperature in September is a pleasant 23°C (74°F). However, be prepared for temperature fluctuations; it can dip to a chilly 11°C (53°F) or soar to a scorching 42°C (108°F). Thankfully, with only 3 mm (0.1 in) of precipitation over 0 days, you can enjoy plenty of dry weather. The average humidity remains comfortable at 63%, making it ideal for outdoor activities.

September Temperature in San Rafael

In September in San Rafael, the average temperature is 23°C (74°F). Maximums can reach 42°C (108°F) and minimums can be as low as 11°C (53°F). Be prepared for a wide range of temperatures when traveling to San Rafael this month.

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 23°C (74°F), with highs reaching up to 42°C (108°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec545456616370767774686255
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 precipitation amount is 3 mm (0.1 in) during a total of 0 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 3 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec63645718211343103158
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 63%. With an average temperature of 23°C (74°F), this humidity feels like a warm embrace, making it quite comfortable for traveling, yet reminding you to stay hydrated as you explore.

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 63%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%76%68%59%57%60%59%58%63%65%69%73%
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 reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Rafael.

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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121111864
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 Weather12°C (54°F)63 mm (2.5 inches)72%moderate
February Weather12°C (54°F)64 mm (2.5 inches)76%high
March Weather13°C (56°F)57 mm (2.3 inches)68%very high
April Weather16°C (62°F)18 mm (0.7 inches)59%extreme
May Weather17°C (64°F)21 mm (0.8 inches)57%extreme
June Weather21°C (70°F)1 mm (0.1 inches)60%extreme
July Weather24°C (76°F)2 mm (0.1 inches)59%extreme
August Weather25°C (77°F)4 mm (0.1 inches)57%extreme
September Weather23°C (74°F)3 mm (0.1 inches)63%extreme
October Weather20°C (68°F)10 mm (0.4 inches)65%very high
November Weather17°C (62°F)31 mm (1.2 inches)69%high
December Weather13°C (55°F)58 mm (2.3 inches)73%moderate

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