September Weather in Altata, Mexico

Last updated: August 27, 2025

In Altata, Mexico, the average temperature in September hovers around 29°C (84°F), with a minimum of 25°C (76°F) and a maximum reaching 33°C (92°F). Visitors can expect a precipitation amount of 142 mm (5.6 in) over 19 days, while the average humidity sits at a comfortable 78%. Enjoy the tropical climate, but don't forget your umbrella!

September Temperature in Altata

In September in Altata, the average temperature is 29°C (84°F). Maximum can reach 33°C (92°F) and minimum can be as low as 25°C (76°F). This pleasant climate makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates September temperature patterns in Altata, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Altata, September typically has an average temperature of 29°C (84°F), with highs reaching up to 33°C (92°F) and lows dropping to around 25°C (76°F).

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

September Precipitation in Altata

In Altata in September, the precipitation amount is 142 mm (5.6 in), spread over 19 days.

September Precipitation Trends in Altata

The chart displays monthly precipitation patterns in Altata, 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 Altata, September typically receives around 142 mm (5.6 inches) of precipitation spread over approximately 19 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 Altata

In Altata in September humidity is 78%. With an average temperature of 29°C (84°F), this humidity feels like a thick blanket enveloping you, making travel feel sticky and exhausting as you navigate through the heat.

September Average Humidity in Altata

This chart illustrates the average monthly humidity levels in Altata, 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 Altata is approximately 78%, 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 Altata

In Altata in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Altata.

Maximum UV Index Levels in Altata for September

The chart shows the monthly maximum UV Index (UVI) for Altata 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 Altata typically reaches 12, which falls under the extreme exposure category.

Data source: Altata 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 Altata Compares to Other Months

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

This table compares monthly weather conditions in Altata, 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 (67°F)	5 mm (0.2 inches)	70%	high
February Weather	19°C (67°F)	16 mm (0.6 inches)	67%	very high
March Weather	20°C (69°F)	1 mm (0.0 inches)	62%	very high
April Weather	23°C (73°F)	0 mm (0.0 inches)	58%	extreme
May Weather	25°C (78°F)	0 mm (0.0 inches)	59%	extreme
June Weather	28°C (82°F)	16 mm (0.6 inches)	64%	extreme
July Weather	29°C (85°F)	55 mm (2.2 inches)	74%	extreme
August Weather	30°C (86°F)	126 mm (4.9 inches)	78%	extreme
September Weather	29°C (84°F)	142 mm (5.6 inches)	78%	extreme
October Weather	28°C (83°F)	40 mm (1.6 inches)	75%	very high
November Weather	25°C (77°F)	22 mm (0.9 inches)	74%	very high
December Weather	21°C (70°F)	8 mm (0.3 inches)	72%	high