September Weather in Altepexi, Mexico

Last updated: August 27, 2025

In September, the average temperature in Altepexi, Mexico hovers around 20°C (68°F), with minimums dipping to 12°C (54°F) and maximums peaking at 30°C (87°F). Expect a fairly wet month with 177 mm (7.0 in) of precipitation spread over 21 days, contributing to a high average humidity of 86%.

September Temperature in Altepexi

In September in Altepexi, the average temperature is 20°C (68°F). Maximums can reach 30°C (87°F), while minimums can be as low as 12°C (54°F). This pleasant temperature range makes Altepexi an ideal destination for travelers looking to enjoy mild weather and outdoor activities.

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

The chart illustrates September temperature patterns in Altepexi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altepexi, September typically has an average temperature of 20°C (68°F), with highs reaching up to 30°C (87°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Altepexi

In Altepexi in September, the total precipitation amount is 177 mm (7.0 in) spread over 21 days.

September Precipitation Trends in Altepexi

The chart displays monthly precipitation patterns in Altepexi, 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 Altepexi, September typically receives around 177 mm (7.0 inches) of precipitation spread over approximately 21 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 Altepexi

In Altepexi 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 Altepexi

This chart illustrates the average monthly humidity levels in Altepexi, 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 Altepexi 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 Altepexi

In Altepexi 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 Altepexi, you can check here.

Maximum UV Index Levels in Altepexi for September

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

Data source: Altepexi 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 Altepexi Compares to Other Months

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

This table compares monthly weather conditions in Altepexi, 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 (60°F)	19 mm (0.7 inches)	88%	very high
February Weather	17°C (64°F)	14 mm (0.5 inches)	86%	extreme
March Weather	19°C (66°F)	21 mm (0.8 inches)	84%	extreme
April Weather	21°C (69°F)	39 mm (1.5 inches)	81%	extreme
May Weather	21°C (71°F)	79 mm (3.1 inches)	82%	extreme
June Weather	20°C (69°F)	159 mm (6.3 inches)	81%	extreme
July Weather	20°C (68°F)	90 mm (3.6 inches)	81%	extreme
August Weather	20°C (68°F)	107 mm (4.2 inches)	82%	extreme
September Weather	20°C (68°F)	177 mm (7.0 inches)	86%	extreme
October Weather	19°C (66°F)	95 mm (3.7 inches)	90%	extreme
November Weather	17°C (63°F)	34 mm (1.3 inches)	91%	very high
December Weather	16°C (61°F)	13 mm (0.5 inches)	91%	very high