September Weather in Chelem, Mexico

Last updated: August 27, 2025

In Chelem, Mexico, the average temperature in September hovers around 28°C (83°F), creating a pleasantly warm atmosphere. Temperatures can dip to a minimum of 24°C (75°F) and soar to a maximum of 34°C (93°F), ensuring a diverse range of experiences. Prepare for 92 mm (3.6 in) of precipitation across 16 days, contributing to the area's lush environment. With an average humidity of 82%, expect a tropical feel that enhances the vibrant charm of Chelem.

September Temperature in Chelem

In September in Chelem, the average temperature is 28°C (83°F), with maximums reaching up to 34°C (93°F) and minimums dropping as low as 24°C (75°F). This warm and pleasant climate makes Chelem an ideal destination for travelers seeking sunshine and outdoor activities.

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

The chart illustrates September temperature patterns in Chelem, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Chelem, September typically has an average temperature of 28°C (83°F), with highs reaching up to 34°C (93°F) and lows dropping to around 24°C (75°F).

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

September Precipitation in Chelem

In Chelem in September, the total precipitation amount reaches 92 mm (3.6 in) spread over 16 days.

September Precipitation Trends in Chelem

The chart displays monthly precipitation patterns in Chelem, 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 Chelem, September typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 16 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 Chelem

In Chelem in September, humidity is 82%. With an average temperature of 28°C (83°F), this humidity feels like stepping into a warm, damp embrace, which can make traveling feel heavy and exhausting, as every movement can be met with a sticky veil of moisture that clings to the skin.

September Average Humidity in Chelem

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

In Chelem 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 Chelem.

Maximum UV Index Levels in Chelem for September

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

Data source: Chelem 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 Chelem Compares to Other Months

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

This table compares monthly weather conditions in Chelem, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	23 mm (0.9 inches)	81%	very high
February Weather	25°C (77°F)	10 mm (0.4 inches)	78%	very high
March Weather	26°C (78°F)	6 mm (0.3 inches)	71%	extreme
April Weather	27°C (81°F)	19 mm (0.8 inches)	70%	extreme
May Weather	28°C (83°F)	34 mm (1.3 inches)	68%	extreme
June Weather	28°C (83°F)	146 mm (5.8 inches)	69%	extreme
July Weather	28°C (83°F)	51 mm (2.0 inches)	74%	extreme
August Weather	28°C (83°F)	80 mm (3.1 inches)	81%	extreme
September Weather	28°C (83°F)	92 mm (3.6 inches)	82%	extreme
October Weather	27°C (81°F)	125 mm (4.9 inches)	83%	extreme
November Weather	25°C (78°F)	40 mm (1.6 inches)	84%	very high
December Weather	24°C (75°F)	18 mm (0.7 inches)	86%	high