September Weather in San Francisco del Mar, Mexico

Last updated: August 27, 2025

In September, the average temperature in San Francisco del Mar, Mexico hovers around 28°C (83°F), with minimums dropping to 25°C (77°F) and soaring to a maximum of 34°C (93°F). Expect 289 mm (11.4 in) of precipitation over the course of 22 days, and a high average humidity level of 87%. Embrace the tropical vibe, but don’t forget your umbrella!

September Temperature in San Francisco del Mar

In September in San Francisco del Mar, the average temperature is 28°C (83°F). Maximums can reach 34°C (93°F), and minimums can be as low as 25°C (77°F). This warm climate makes San Francisco del Mar an ideal destination for travelers seeking sunny weather and outdoor adventures.

September Weather in San Francisco del Mar: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in San Francisco del Mar, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Francisco del Mar, September typically has an average temperature of 28°C (83°F), with highs reaching up to 34°C (93°F) and lows dropping to around 25°C (77°F).

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

September Precipitation in San Francisco del Mar

In San Francisco del Mar in September, the precipitation amount is 289 mm (11.4 in), occurring over a span of 22 days.

September Precipitation Trends in San Francisco del Mar

The chart displays monthly precipitation patterns in San Francisco del Mar, 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 Francisco del Mar, September typically receives around 289 mm (11.4 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 Francisco del Mar

In San Francisco del Mar in September humidity is 87%. With an average temperature of 28°C (83°F), this humidity feels like you're enveloped in a warm, sticky blanket, making outdoor activities slightly uncomfortable and travel plans require frequent breaks for hydration and respite from the heat.

September Average Humidity in San Francisco del Mar

This chart illustrates the average monthly humidity levels in San Francisco del Mar, 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 Francisco del Mar is approximately 87%, 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 Francisco del Mar

In San Francisco del Mar in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Francisco del Mar.

Maximum UV Index Levels in San Francisco del Mar for September

The chart shows the monthly maximum UV Index (UVI) for San Francisco del Mar 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 Francisco del Mar typically reaches 13, which falls under the extreme exposure category.

Data source: San Francisco del Mar 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 Francisco del Mar Compares to Other Months

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

This table compares monthly weather conditions in San Francisco del Mar, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (78°F)	8 mm (0.3 inches)	83%	very high
February Weather	26°C (79°F)	13 mm (0.5 inches)	76%	extreme
March Weather	27°C (81°F)	11 mm (0.4 inches)	66%	extreme
April Weather	28°C (83°F)	31 mm (1.2 inches)	59%	extreme
May Weather	29°C (84°F)	113 mm (4.5 inches)	64%	extreme
June Weather	28°C (83°F)	443 mm (17.4 inches)	69%	extreme
July Weather	29°C (84°F)	115 mm (4.5 inches)	82%	extreme
August Weather	28°C (83°F)	250 mm (9.9 inches)	87%	extreme
September Weather	28°C (83°F)	289 mm (11.4 inches)	87%	extreme
October Weather	28°C (82°F)	216 mm (8.5 inches)	88%	extreme
November Weather	27°C (81°F)	7 mm (0.3 inches)	88%	very high
December Weather	26°C (79°F)	11 mm (0.4 inches)	88%	very high