September Weather in Compostela, Mexico

Last updated: August 27, 2025

In September, the average temperature in Compostela, Mexico is a comfortable 24°C (76°F). With minimums reaching 20°C (68°F) and highs soaring up to 32°C (90°F), it's essential to prepare for varying conditions. Expect 391 mm (15.4 in) of precipitation spread over 29 days, contributing to an average humidity of 78%. Be sure to pack accordingly for a tropical experience!

September Temperature in Compostela

In September in Compostela, the average temperature is 24°C (76°F), with maximums reaching 32°C (90°F) and minimums dropping to as low as 20°C (68°F). This pleasant weather makes it an ideal time for outdoor adventures and sightseeing in Compostela.

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

The chart illustrates September temperature patterns in Compostela, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Compostela, September typically has an average temperature of 24°C (76°F), with highs reaching up to 32°C (90°F) and lows dropping to around 20°C (68°F).

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

September Precipitation in Compostela

In Compostela in September, the total precipitation amount is 391 mm (15.4 in) spread over 29 days.

September Precipitation Trends in Compostela

The chart displays monthly precipitation patterns in Compostela, 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 Compostela, September typically receives around 391 mm (15.4 inches) of precipitation spread over approximately 29 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 Compostela

In Compostela in September, humidity is 78%. With an average temperature of 24°C (76°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel sticky and uncomfortable, potentially leading to fatigue for travelers.

September Average Humidity in Compostela

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

In Compostela 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 Compostela.

Maximum UV Index Levels in Compostela for September

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

Data source: Compostela 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 Compostela Compares to Other Months

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

This table compares monthly weather conditions in Compostela, 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)	18 mm (0.7 inches)	71%	very high
February Weather	20°C (68°F)	23 mm (0.9 inches)	69%	very high
March Weather	21°C (70°F)	2 mm (0.1 inches)	67%	extreme
April Weather	22°C (71°F)	0 mm (0.0 inches)	66%	extreme
May Weather	23°C (74°F)	11 mm (0.4 inches)	69%	extreme
June Weather	25°C (77°F)	171 mm (6.7 inches)	78%	extreme
July Weather	25°C (77°F)	342 mm (13.4 inches)	79%	extreme
August Weather	25°C (77°F)	472 mm (18.6 inches)	78%	extreme
September Weather	24°C (76°F)	391 mm (15.4 inches)	78%	extreme
October Weather	24°C (76°F)	186 mm (7.3 inches)	75%	extreme
November Weather	22°C (73°F)	21 mm (0.8 inches)	74%	very high
December Weather	20°C (68°F)	15 mm (0.6 inches)	74%	high