September Weather in San Pedro, Mexico

Last updated: August 26, 2025

In September, the average temperature in San Pedro, Mexico is a pleasant 20°C (69°F), making it an ideal time to explore the area. Expect minimum temperatures around 15°C (59°F) and highs reaching up to 30°C (86°F). Be prepared for some rain, as the region experiences approximately 158 mm (6.2 in) of precipitation over 22 days. Keep hydrated with an average humidity level of 84%, allowing for a refreshing atmosphere throughout your visit!

September Temperature in San Pedro

In September in San Pedro, the average temperature is 20°C (69°F). The maximum can reach 30°C (86°F), while the minimum can drop to as low as 15°C (59°F). This pleasant climate makes San Pedro an ideal destination for travelers looking to enjoy mild and comfortable weather.

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

The chart illustrates September temperature patterns in San Pedro, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Pedro, September typically has an average temperature of 20°C (69°F), with highs reaching up to 30°C (86°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in San Pedro

In San Pedro in September, the precipitation amount is 158 mm (6.2 in) during 22 days of the month.

September Precipitation Trends in San Pedro

The chart displays monthly precipitation patterns in San Pedro, 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 Pedro, September typically receives around 158 mm (6.2 inches) of precipitation spread over approximately 22 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 San Pedro

In San Pedro in September humidity is 84%. With an average temperature of 20°C (69°F), this humidity feels like walking through a warm, moist blanket, making travel feel heavy and slightly fatigued as the heat clings to your skin and leaves you yearning for a refreshing breeze.

September Average Humidity in San Pedro

This chart illustrates the average monthly humidity levels in San Pedro, 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 Pedro is approximately 84%, 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 San Pedro

In San Pedro 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 Pedro, you can check here.

Maximum UV Index Levels in San Pedro for September

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

Data source: San Pedro 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 Pedro Compares to Other Months

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

This table compares monthly weather conditions in San Pedro, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (62°F)	9 mm (0.3 inches)	64%	very high
February Weather	18°C (64°F)	14 mm (0.6 inches)	57%	extreme
March Weather	20°C (69°F)	6 mm (0.2 inches)	46%	extreme
April Weather	22°C (72°F)	2 mm (0.1 inches)	42%	extreme
May Weather	23°C (74°F)	26 mm (1.0 inches)	51%	extreme
June Weather	22°C (73°F)	112 mm (4.4 inches)	74%	extreme
July Weather	21°C (69°F)	165 mm (6.5 inches)	79%	extreme
August Weather	21°C (70°F)	137 mm (5.4 inches)	81%	extreme
September Weather	20°C (69°F)	158 mm (6.2 inches)	84%	extreme
October Weather	20°C (68°F)	59 mm (2.3 inches)	75%	extreme
November Weather	18°C (65°F)	26 mm (1.0 inches)	71%	very high
December Weather	16°C (62°F)	9 mm (0.4 inches)	74%	very high