September Weather in San Gregorio, Mexico

Last updated: August 27, 2025

In San Gregorio, Mexico, the average temperature in September hovers around 21°C (70°F), with minimums dipping to 15°C (59°F) and maximums reaching 29°C (85°F). Expect a precipitation amount of 214 mm (8.4 in) spread over 26 days, contributing to an average humidity of 82%. It's a month where the air feels warm and moist, perfect for those who enjoy a lush and vibrant atmosphere!

September Temperature in San Gregorio

In September in San Gregorio, the average temperature is 21°C (70°F). Maximums can reach 29°C (85°F), while minimums can drop to as low as 15°C (59°F). This pleasant climate makes it an ideal time for travelers to explore outdoor activities and enjoy the local attractions.

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

The chart illustrates September temperature patterns in San Gregorio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Gregorio, September typically has an average temperature of 21°C (70°F), with highs reaching up to 29°C (85°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in San Gregorio

In San Gregorio in September, the total precipitation amount is 214 mm (8.4 in), occurring over the span of 26 days.

September Precipitation Trends in San Gregorio

The chart displays monthly precipitation patterns in San Gregorio, 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 Gregorio, September typically receives around 214 mm (8.4 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 Gregorio

In San Gregorio in September, humidity is 82%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace that can quickly lead to discomfort for travelers, making outdoor activities less enjoyable and requiring frequent breaks for hydration.

September Average Humidity in San Gregorio

This chart illustrates the average monthly humidity levels in San Gregorio, 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 Gregorio is approximately 82%, 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 Gregorio

In San Gregorio 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 Gregorio, you can check here.

Maximum UV Index Levels in San Gregorio for September

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

Data source: San Gregorio 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 Gregorio Compares to Other Months

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

This table compares monthly weather conditions in San Gregorio, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	19°C (66°F)	2 mm (0.1 inches)	84%	very high
February Weather	20°C (69°F)	2 mm (0.1 inches)	78%	extreme
March Weather	23°C (73°F)	6 mm (0.2 inches)	75%	extreme
April Weather	24°C (76°F)	18 mm (0.7 inches)	70%	extreme
May Weather	24°C (76°F)	94 mm (3.7 inches)	77%	extreme
June Weather	22°C (72°F)	260 mm (10.2 inches)	76%	extreme
July Weather	22°C (72°F)	151 mm (5.9 inches)	68%	extreme
August Weather	22°C (71°F)	219 mm (8.6 inches)	70%	extreme
September Weather	21°C (70°F)	214 mm (8.4 inches)	82%	extreme
October Weather	21°C (70°F)	115 mm (4.5 inches)	91%	extreme
November Weather	20°C (68°F)	32 mm (1.3 inches)	89%	very high
December Weather	19°C (66°F)	2 mm (0.1 inches)	88%	very high