September Weather in Colotlan, Mexico

Last updated: August 27, 2025

In September, the average temperature in Colotlan, Mexico hovers around 19°C (66°F). Expect a minimum of 10°C (50°F) and a maximum of 28°C (83°F), making for a pleasantly mild climate. However, be prepared for 197 mm (7.8 in) of precipitation over 21 days, coupled with an average humidity level of 84%. Stay comfortable and enjoy the changing weather!

September Temperature in Colotlan

In September in Colotlan, the average temperature is 19°C (66°F). Maximums can reach 28°C (83°F) and minimums can drop as low as 10°C (50°F). This comfortable climate makes it an ideal time to explore and enjoy outdoor activities in Colotlan.

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

The chart illustrates September temperature patterns in Colotlan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Colotlan, September typically has an average temperature of 19°C (66°F), with highs reaching up to 28°C (83°F) and lows dropping to around 10°C (50°F).

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

September Precipitation in Colotlan

In Colotlan in September, the precipitation amount is 197 mm (7.8 in), occurring over the course of 21 days.

September Precipitation Trends in Colotlan

The chart displays monthly precipitation patterns in Colotlan, 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 Colotlan, September typically receives around 197 mm (7.8 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 Colotlan

In Colotlan in September, humidity is 84%. With an average temperature of 19°C (66°F), this humidity feels like a warm, sticky embrace that can make traveling uncomfortable and exhausting, as the air clings to your skin, and every step taken feels heavier in the sultry atmosphere.

September Average Humidity in Colotlan

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

In Colotlan 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 Colotlan.

Maximum UV Index Levels in Colotlan for September

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

Data source: Colotlan 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 Colotlan Compares to Other Months

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

This table compares monthly weather conditions in Colotlan, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (56°F)	15 mm (0.6 inches)	64%	very high
February Weather	15°C (60°F)	16 mm (0.6 inches)	57%	extreme
March Weather	18°C (65°F)	5 mm (0.2 inches)	46%	extreme
April Weather	20°C (68°F)	2 mm (0.1 inches)	42%	extreme
May Weather	22°C (71°F)	19 mm (0.7 inches)	51%	extreme
June Weather	22°C (72°F)	125 mm (4.9 inches)	74%	extreme
July Weather	19°C (67°F)	257 mm (10.1 inches)	79%	extreme
August Weather	20°C (67°F)	179 mm (7.0 inches)	81%	extreme
September Weather	19°C (66°F)	197 mm (7.8 inches)	84%	extreme
October Weather	18°C (65°F)	73 mm (2.9 inches)	75%	extreme
November Weather	16°C (61°F)	17 mm (0.7 inches)	71%	very high
December Weather	13°C (56°F)	13 mm (0.5 inches)	74%	very high