September Weather in Piedras Grandes, Mexico

Last updated: August 27, 2025

In September, the average temperature in Piedras Grandes, Mexico hovers around 20°C (69°F). Expect a minimum of 13°C (57°F) and a pleasant maximum of 29°C (85°F). However, be prepared for frequent showers; rainfall totals about 257 mm (10.1 in) over 25 days, accompanied by a high average humidity level of 86%.

September Temperature in Piedras Grandes

In September in Piedras Grandes, the average temperature is 20°C (69°F). Maximums can reach 29°C (85°F) and minimums can be as low as 13°C (57°F). This makes it a pleasant time for travelers, offering comfortable weather for outdoor activities and exploration.

September Weather in Piedras Grandes: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Piedras Grandes, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Piedras Grandes, September typically has an average temperature of 20°C (69°F), with highs reaching up to 29°C (85°F) and lows dropping to around 13°C (57°F).

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

September Precipitation in Piedras Grandes

In Piedras Grandes in September, the precipitation amount is 257 mm (10.1 in) over the course of 25 days.

September Precipitation Trends in Piedras Grandes

The chart displays monthly precipitation patterns in Piedras Grandes, 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 Piedras Grandes, September typically receives around 257 mm (10.1 inches) of precipitation spread over approximately 25 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 Piedras Grandes

In Piedras Grandes in September, humidity is 86%. With an average temperature of 20°C (69°F), this humidity feels like a warm, dense blanket wrapping around you, making travel feel sluggish and sticky, as each step can leave you yearning for a cool breeze or a refreshing drink.

September Average Humidity in Piedras Grandes

This chart illustrates the average monthly humidity levels in Piedras Grandes, 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 Piedras Grandes is approximately 86%, 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 Piedras Grandes

In Piedras Grandes 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 Piedras Grandes, you can check here.

Maximum UV Index Levels in Piedras Grandes for September

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

Data source: Piedras Grandes 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 Piedras Grandes Compares to Other Months

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

This table compares monthly weather conditions in Piedras Grandes, 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 (59°F)	78 mm (3.1 inches)	88%	very high
February Weather	16°C (62°F)	55 mm (2.2 inches)	86%	extreme
March Weather	18°C (64°F)	83 mm (3.2 inches)	84%	extreme
April Weather	20°C (68°F)	94 mm (3.7 inches)	81%	extreme
May Weather	21°C (71°F)	150 mm (5.9 inches)	82%	extreme
June Weather	21°C (70°F)	213 mm (8.4 inches)	81%	extreme
July Weather	21°C (69°F)	144 mm (5.7 inches)	81%	extreme
August Weather	21°C (69°F)	221 mm (8.7 inches)	82%	extreme
September Weather	20°C (69°F)	257 mm (10.1 inches)	86%	extreme
October Weather	19°C (67°F)	166 mm (6.5 inches)	90%	extreme
November Weather	17°C (62°F)	90 mm (3.5 inches)	91%	very high
December Weather	15°C (60°F)	38 mm (1.5 inches)	91%	very high