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September Weather in San Bernardo, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Bernardo, Mexico hovers around 25°C (77°F). Expect a range where the minimum can drop to 14°C (58°F) and the maximum may soar to 38°C (100°F). With 99 mm (3.9 in) of precipitation across approximately 15 days, the air tends to be quite humid, with an average humidity of 82%. Perfect for those who enjoy a warm and slightly rainy climate!

September Temperature in San Bernardo

In September in San Bernardo, the average temperature is 25°C (77°F). Maximums can reach 38°C (100°F), while minimums can drop as low as 14°C (58°F). This pleasant climate makes San Bernardo an ideal destination for outdoor activities and exploring the local culture.

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

The chart illustrates September temperature patterns in San Bernardo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Bernardo, September typically has an average temperature of 25°C (77°F), with highs reaching up to 38°C (100°F) and lows dropping to around 14°C (58°F).
JanFebMarAprMayJunJulAugSepOctNovDec586065727783797977756759
Data source: Temperature data for San Bernardo 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 Bernardo

In San Bernardo in September, the total precipitation amount is 99 mm (3.9 in) over the course of 15 days.

September Precipitation Trends in San Bernardo

The chart displays monthly precipitation patterns in San Bernardo, 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 Bernardo, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec303123234620915699324430
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in San Bernardo

In San Bernardo in September, humidity is 82%. With an average temperature of 25°C (77°F), this humidity feels like a warm, oppressive blanket enveloping you as you explore, making every step feel more laborious and prompting the need for frequent hydration breaks.

September Average Humidity in San Bernardo

This chart illustrates the average monthly humidity levels in San Bernardo, 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 Bernardo is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%67%60%51%47%50%70%82%82%78%78%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in San Bernardo

In San Bernardo 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 Bernardo.

Maximum UV Index Levels in San Bernardo for September

The chart shows the monthly maximum UV Index (UVI) for San Bernardo 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 Bernardo typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69101313131212121076
Data source: San Bernardo 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 Bernardo Compares to Other Months

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

This table compares monthly weather conditions in San Bernardo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather14°C (58°F)30 mm (1.2 inches)74%high
February Weather16°C (60°F)31 mm (1.2 inches)67%very high
March Weather19°C (66°F)23 mm (0.9 inches)60%very high
April Weather22°C (72°F)1 mm (0.1 inches)51%extreme
May Weather25°C (77°F)3 mm (0.1 inches)47%extreme
June Weather28°C (83°F)46 mm (1.8 inches)50%extreme
July Weather26°C (79°F)209 mm (8.2 inches)70%extreme
August Weather26°C (79°F)156 mm (6.1 inches)81%extreme
September Weather25°C (77°F)99 mm (3.9 inches)82%extreme
October Weather24°C (75°F)32 mm (1.2 inches)78%very high
November Weather19°C (67°F)44 mm (1.7 inches)78%high
December Weather15°C (59°F)30 mm (1.2 inches)80%high

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