September Weather in Atonalisco, Mexico

Last updated: August 27, 2025

In Atonalisco, Mexico, the average temperature in September hovers around 25°C (77°F). Expect a minimum of 19°C (67°F) and a maximum reaching 34°C (94°F). Be prepared for a notable precipitation amount of 306 mm (12.1 in) over 26 days, with an average humidity level of 84%.

September Temperature in Atonalisco

In September in Atonalisco, the average temperature is 25°C (77°F). Maximum temperatures can reach 34°C (94°F), while minimums can drop to as low as 19°C (67°F). This pleasant climate makes Atonalisco an ideal destination for travelers seeking warm weather and comfortable conditions.

September Weather in Atonalisco: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Atonalisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Atonalisco, September typically has an average temperature of 25°C (77°F), with highs reaching up to 34°C (94°F) and lows dropping to around 19°C (67°F).

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

September Precipitation in Atonalisco

In Atonalisco in September, the precipitation amount is 306 mm (12.1 in) over the course of 26 days.

September Precipitation Trends in Atonalisco

The chart displays monthly precipitation patterns in Atonalisco, 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 Atonalisco, September typically receives around 306 mm (12.1 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 Atonalisco

In Atonalisco in September, humidity is 84%. With an average temperature of 25°C (77°F), this humidity feels like a warm, enveloping blanket that clings to your skin, making outdoor activities challenging and prompting travelers to seek shade and stay hydrated.

September Average Humidity in Atonalisco

This chart illustrates the average monthly humidity levels in Atonalisco, 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 Atonalisco is approximately 84%, 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 Atonalisco

In Atonalisco 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 Atonalisco.

Maximum UV Index Levels in Atonalisco for September

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

Data source: Atonalisco 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 Atonalisco Compares to Other Months

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

This table compares monthly weather conditions in Atonalisco, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	20°C (68°F)	18 mm (0.7 inches)	64%	very high
February Weather	21°C (70°F)	25 mm (1.0 inches)	57%	very high
March Weather	23°C (73°F)	1 mm (0.1 inches)	46%	extreme
April Weather	24°C (75°F)	1 mm (0.0 inches)	42%	extreme
May Weather	26°C (78°F)	5 mm (0.2 inches)	51%	extreme
June Weather	27°C (80°F)	114 mm (4.5 inches)	74%	extreme
July Weather	26°C (79°F)	232 mm (9.1 inches)	79%	extreme
August Weather	26°C (78°F)	300 mm (11.8 inches)	81%	extreme
September Weather	25°C (77°F)	306 mm (12.1 inches)	84%	extreme
October Weather	25°C (77°F)	143 mm (5.6 inches)	75%	extreme
November Weather	23°C (73°F)	15 mm (0.6 inches)	71%	very high
December Weather	20°C (69°F)	15 mm (0.6 inches)	74%	high