September Weather in Bernal, Mexico

Last updated: August 26, 2025

In September, the average temperature in Bernal, Mexico hovers around 19°C (67°F), with nighttime lows dipping to a comfortable 10°C (50°F) and daytime highs reaching up to 31°C (88°F). Expect some rain, as the region sees around 122 mm (4.8 in) of precipitation over approximately 17 days. With an average humidity of 81%, it's a perfect time to enjoy the lush, vibrant environment!

September Temperature in Bernal

In September in Bernal, the average temperature is 19°C (67°F). Maximums can reach 31°C (88°F), and minimums can be as low as 10°C (50°F). This mild weather makes Bernal an ideal destination for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Bernal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Bernal, September typically has an average temperature of 19°C (67°F), with highs reaching up to 31°C (88°F) and lows dropping to around 10°C (50°F).

Data source: Temperature data for Bernal generated using information from the Copernicus Climate Change Service.

September Precipitation in Bernal

In Bernal in September, the precipitation amount is 122 mm (4.8 in) spread over the course of 17 days.

September Precipitation Trends in Bernal

The chart displays monthly precipitation patterns in Bernal, 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 Bernal, September typically receives around 122 mm (4.8 inches) of precipitation spread over approximately 17 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Bernal

In Bernal in September humidity is 81%. With an average temperature of 19°C (67°F), this humidity feels like a heavy blanket enveloping you, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick, prompting you to seek shade and hydration frequently.

September Average Humidity in Bernal

This chart illustrates the average monthly humidity levels in Bernal, 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 Bernal is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Bernal

In Bernal 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 Bernal, you can check here.

Maximum UV Index Levels in Bernal for September

The chart shows the monthly maximum UV Index (UVI) for Bernal 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 Bernal typically reaches 14, which falls under the extreme exposure category.

Data source: Bernal 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 Bernal Compares to Other Months

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

This table compares monthly weather conditions in Bernal, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	15°C (58°F)	6 mm (0.2 inches)	74%	very high
February Weather	17°C (63°F)	7 mm (0.3 inches)	65%	extreme
March Weather	19°C (67°F)	14 mm (0.6 inches)	58%	extreme
April Weather	22°C (71°F)	17 mm (0.7 inches)	58%	extreme
May Weather	23°C (73°F)	45 mm (1.8 inches)	67%	extreme
June Weather	21°C (70°F)	126 mm (5.0 inches)	76%	extreme
July Weather	20°C (69°F)	86 mm (3.4 inches)	67%	extreme
August Weather	21°C (69°F)	78 mm (3.1 inches)	68%	extreme
September Weather	19°C (67°F)	122 mm (4.8 inches)	81%	extreme
October Weather	18°C (65°F)	57 mm (2.3 inches)	83%	extreme
November Weather	16°C (61°F)	20 mm (0.8 inches)	84%	very high
December Weather	15°C (59°F)	6 mm (0.2 inches)	81%	very high