September Weather in Chalma, Mexico

Last updated: August 27, 2025

In Chalma, Mexico, the average temperature in September hovers around 28°C (83°F). Expect a range where the temperature can dip to a crisp 19°C (67°F) and soar up to a sizzling 41°C (105°F). With 170 mm (6.7 in) of precipitation spread across 18 days, the average humidity sits at a steamy 84%. Stay prepared for a warm and humid month!

September Temperature in Chalma

In September in Chalma, the average temperature is 28°C (83°F). Maximums can reach 41°C (105°F), while minimums can drop as low as 19°C (67°F). Be prepared for warm weather and stay hydrated during your travels!

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

The chart illustrates September temperature patterns in Chalma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chalma, September typically has an average temperature of 28°C (83°F), with highs reaching up to 41°C (105°F) and lows dropping to around 19°C (67°F).

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

September Precipitation in Chalma

In Chalma in September, the precipitation amount is 170 mm (6.7 in) over the course of 18 days.

September Precipitation Trends in Chalma

The chart displays monthly precipitation patterns in Chalma, 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 Chalma, September typically receives around 170 mm (6.7 inches) of precipitation spread over approximately 18 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 Chalma

In Chalma in September, humidity is 84%. With an average temperature of 28°C (83°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and the air almost stifling for traveling.

September Average Humidity in Chalma

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

In Chalma 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 Chalma.

Maximum UV Index Levels in Chalma for September

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

Data source: Chalma 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 Chalma Compares to Other Months

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

This table compares monthly weather conditions in Chalma, 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)	64 mm (2.5 inches)	88%	high
February Weather	21°C (70°F)	43 mm (1.7 inches)	86%	very high
March Weather	24°C (75°F)	58 mm (2.3 inches)	83%	extreme
April Weather	27°C (80°F)	73 mm (2.9 inches)	80%	extreme
May Weather	29°C (85°F)	105 mm (4.1 inches)	82%	extreme
June Weather	29°C (84°F)	149 mm (5.9 inches)	79%	extreme
July Weather	29°C (84°F)	104 mm (4.1 inches)	72%	extreme
August Weather	29°C (85°F)	112 mm (4.4 inches)	74%	extreme
September Weather	28°C (83°F)	170 mm (6.7 inches)	84%	extreme
October Weather	26°C (79°F)	248 mm (9.8 inches)	92%	extreme
November Weather	22°C (72°F)	69 mm (2.7 inches)	91%	very high
December Weather	20°C (68°F)	36 mm (1.4 inches)	91%	high