September Weather in Union Buena Vista, Mexico

Last updated: August 27, 2025

In September, the average temperature in Union Buena Vista, Mexico hovers around 24°C (75°F), creating a pleasant climate. Temperatures can dip to a minimum of 18°C (65°F) and peak at a warm 32°C (91°F). Expect a fair bit of rain, with 303 mm (11.9 in) of precipitation spread over 27 days. Additionally, the air is quite humid, with an average humidity level of 87%—perfect for those who love a tropical feel!

September Temperature in Union Buena Vista

In September in Union Buena Vista, the average temperature is 24°C (75°F). Maximums can reach 32°C (91°F), while minimums can drop to as low as 18°C (65°F). This mild and pleasant climate makes it a perfect time for outdoor activities and exploring the local attractions.

September Weather in Union Buena Vista: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Union Buena Vista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union Buena Vista, September typically has an average temperature of 24°C (75°F), with highs reaching up to 32°C (91°F) and lows dropping to around 18°C (65°F).

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

September Precipitation in Union Buena Vista

In Union Buena Vista in September, the precipitation amount is 303 mm (11.9 in) during 27 days, indicating a relatively wet period for the region.

September Precipitation Trends in Union Buena Vista

The chart displays monthly precipitation patterns in Union Buena Vista, 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 Union Buena Vista, September typically receives around 303 mm (11.9 inches) of precipitation spread over approximately 27 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 Union Buena Vista

In Union Buena Vista in September, humidity is 87%. With an average temperature of 24°C (75°F), this humidity feels like a warm, sticky embrace that clings to your skin, making outdoor activities feel heavier and more exhausting, and the air thickens, leaving you longing for shade and refreshing breezes as you navigate your adventures.

September Average Humidity in Union Buena Vista

This chart illustrates the average monthly humidity levels in Union Buena Vista, 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 Union Buena Vista is approximately 87%, 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 Union Buena Vista

In Union Buena Vista 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 Union Buena Vista.

Maximum UV Index Levels in Union Buena Vista for September

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

Data source: Union Buena Vista 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 Union Buena Vista Compares to Other Months

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

This table compares monthly weather conditions in Union Buena Vista, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	21°C (70°F)	11 mm (0.4 inches)	83%	very high
February Weather	23°C (73°F)	5 mm (0.2 inches)	76%	extreme
March Weather	24°C (76°F)	9 mm (0.3 inches)	66%	extreme
April Weather	26°C (79°F)	30 mm (1.2 inches)	59%	extreme
May Weather	26°C (78°F)	159 mm (6.2 inches)	64%	extreme
June Weather	24°C (76°F)	319 mm (12.6 inches)	69%	extreme
July Weather	25°C (76°F)	152 mm (6.0 inches)	82%	extreme
August Weather	24°C (76°F)	224 mm (8.8 inches)	87%	extreme
September Weather	24°C (75°F)	303 mm (11.9 inches)	87%	extreme
October Weather	23°C (74°F)	281 mm (11.1 inches)	88%	extreme
November Weather	22°C (72°F)	36 mm (1.4 inches)	88%	very high
December Weather	21°C (71°F)	17 mm (0.7 inches)	88%	very high