September Weather in San Francisco del Mar Viejo, Mexico

Last updated: August 27, 2025

In San Francisco del Mar Viejo, Mexico, the average temperature in September is a warm 28°C (83°F), creating a pleasant atmosphere for visitors. Temperatures can dip to a comfortable 25°C (77°F) and peak at a balmy 34°C (93°F). Be prepared for some rain, as 287 mm (11.3 in) of precipitation is expected over approximately 20 days, contributing to the region's lush greenery. With an average humidity of 87%, it’s wise to stay hydrated and enjoy the tropical vibes!

September Temperature in San Francisco del Mar Viejo

In September in San Francisco del Mar Viejo, 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 Viejo an ideal destination for travelers seeking sunny weather and outdoor adventures.

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

The chart illustrates September temperature patterns in San Francisco del Mar Viejo, 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 Viejo, 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 Viejo generated using information from the Copernicus Climate Change Service.

September Precipitation in San Francisco del Mar Viejo

In San Francisco del Mar Viejo in September, the precipitation amount is 287 mm (11.3 in) spread over 20 days.

September Precipitation Trends in San Francisco del Mar Viejo

The chart displays monthly precipitation patterns in San Francisco del Mar Viejo, 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 Viejo, September typically receives around 287 mm (11.3 inches) of precipitation spread over approximately 20 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 Viejo

In San Francisco del Mar Viejo 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 Viejo

This chart illustrates the average monthly humidity levels in San Francisco del Mar Viejo, 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 Viejo 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 Viejo

In San Francisco del Mar Viejo 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 Viejo.

Maximum UV Index Levels in San Francisco del Mar Viejo for September

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

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

Weather in San Francisco del Mar Viejo 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 Viejo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Francisco del Mar Viejo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (77°F)	6 mm (0.2 inches)	83%	very high
February Weather	26°C (78°F)	10 mm (0.4 inches)	76%	extreme
March Weather	27°C (80°F)	5 mm (0.2 inches)	66%	extreme
April Weather	28°C (82°F)	17 mm (0.7 inches)	59%	extreme
May Weather	29°C (84°F)	117 mm (4.6 inches)	64%	extreme
June Weather	28°C (83°F)	416 mm (16.4 inches)	69%	extreme
July Weather	29°C (84°F)	113 mm (4.5 inches)	82%	extreme
August Weather	28°C (83°F)	263 mm (10.4 inches)	87%	extreme
September Weather	28°C (83°F)	287 mm (11.3 inches)	87%	extreme
October Weather	27°C (81°F)	186 mm (7.3 inches)	88%	extreme
November Weather	26°C (79°F)	6 mm (0.2 inches)	88%	very high
December Weather	25°C (78°F)	9 mm (0.4 inches)	88%	very high