September Weather in San Francisco Huehuetlan, Mexico

Last updated: August 27, 2025

In San Francisco Huehuetlan, Mexico, the average temperature in September is a pleasant 20°C (68°F). During this time, temperatures can dip to a minimum of 12°C (55°F) and soar to a maximum of 29°C (84°F). However, be prepared for 305 mm (12.0 in) of precipitation spread over 26 days, contributing to a notably high average humidity of 86%.

September Temperature in San Francisco Huehuetlan

In September in San Francisco Huehuetlan, the average temperature is 20°C (68°F). Maximums can reach 29°C (84°F) and minimums can be as low as 12°C (55°F). This makes it an ideal time for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in San Francisco Huehuetlan, 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 Huehuetlan, September typically has an average temperature of 20°C (68°F), with highs reaching up to 29°C (84°F) and lows dropping to around 12°C (55°F).

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

September Precipitation in San Francisco Huehuetlan

In San Francisco Huehuetlan in September, the total precipitation amount is 305 mm (12.0 in) over the course of 26 days.

September Precipitation Trends in San Francisco Huehuetlan

The chart displays monthly precipitation patterns in San Francisco Huehuetlan, 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 Huehuetlan, September typically receives around 305 mm (12.0 inches) of precipitation spread over approximately 26 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 Huehuetlan

In San Francisco Huehuetlan in September, humidity is 86%. With an average temperature of 20°C (68°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities challenging and necessitating frequent breaks for hydration and shade while traveling.

September Average Humidity in San Francisco Huehuetlan

This chart illustrates the average monthly humidity levels in San Francisco Huehuetlan, 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 Huehuetlan 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 San Francisco Huehuetlan

In San Francisco Huehuetlan 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 Francisco Huehuetlan, you can check here.

Maximum UV Index Levels in San Francisco Huehuetlan for September

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

Data source: San Francisco Huehuetlan 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 Huehuetlan Compares to Other Months

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

This table compares monthly weather conditions in San Francisco Huehuetlan, 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)	48 mm (1.9 inches)	88%	very high
February Weather	17°C (62°F)	39 mm (1.5 inches)	86%	extreme
March Weather	18°C (65°F)	45 mm (1.8 inches)	84%	extreme
April Weather	20°C (68°F)	77 mm (3.0 inches)	81%	extreme
May Weather	21°C (70°F)	133 mm (5.2 inches)	82%	extreme
June Weather	20°C (68°F)	265 mm (10.4 inches)	81%	extreme
July Weather	20°C (67°F)	183 mm (7.2 inches)	81%	extreme
August Weather	20°C (68°F)	209 mm (8.2 inches)	82%	extreme
September Weather	20°C (68°F)	305 mm (12.0 inches)	86%	extreme
October Weather	19°C (66°F)	215 mm (8.5 inches)	90%	extreme
November Weather	17°C (62°F)	94 mm (3.7 inches)	91%	very high
December Weather	15°C (60°F)	33 mm (1.3 inches)	91%	very high