September Weather in San Pedro, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Pedro, Mexico hovers around 18°C (64°F). Visitors can expect a minimum of 8°C (46°F) and enjoy highs reaching up to 28°C (82°F). Rainfall is a common occurrence, with an average precipitation of 172 mm (6.8 in) spread over 19 days, and the air is often quite humid, with an average humidity level of 81%.

September Temperature in San Pedro

In September in San Pedro, the average temperature is 18°C (64°F). Maximums can reach 28°C (82°F), while minimums can drop as low as 8°C (46°F). It’s a great time to visit for those who enjoy mild weather and comfortable outdoor activities.

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 18°C (64°F), with highs reaching up to 28°C (82°F) and lows dropping to around 8°C (46°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 total precipitation amount reaches 172 mm (6.8 in) over a span of 19 days.

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 172 mm (6.8 inches) of precipitation spread over approximately 19 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 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

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 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 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	13°C (56°F)	7 mm (0.3 inches)	74%	very high
February Weather	16°C (60°F)	8 mm (0.3 inches)	65%	extreme
March Weather	18°C (65°F)	13 mm (0.5 inches)	58%	extreme
April Weather	20°C (68°F)	14 mm (0.6 inches)	58%	extreme
May Weather	21°C (70°F)	48 mm (1.9 inches)	67%	extreme
June Weather	19°C (67°F)	162 mm (6.4 inches)	76%	extreme
July Weather	18°C (65°F)	142 mm (5.6 inches)	67%	extreme
August Weather	18°C (65°F)	136 mm (5.3 inches)	68%	extreme
September Weather	18°C (64°F)	172 mm (6.8 inches)	81%	extreme
October Weather	17°C (63°F)	66 mm (2.6 inches)	83%	extreme
November Weather	15°C (59°F)	24 mm (0.9 inches)	84%	very high
December Weather	14°C (57°F)	5 mm (0.2 inches)	81%	very high