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September Weather in Union Buenavista, Mexico

Last updated: August 27, 2025

In September, the average temperature in Union Buenavista, Mexico is a pleasant 22°C (73°F), with lows dipping to 17°C (62°F) and highs soaring to 31°C (88°F). Expect 313 mm (12.3 in) of precipitation spread over 27 days, coupled with a high average humidity of 80%. Enjoy this inviting climate while soaking up the local charm!

September Temperature in Union Buenavista

In September in Union Buenavista, the average temperature is 22°C (73°F). Maximums can reach 31°C (88°F) and minimums can drop to as low as 17°C (62°F). This pleasant weather makes Union Buenavista an ideal destination for travelers seeking a comfortable climate.

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

The chart illustrates September temperature patterns in Union Buenavista, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union Buenavista, September typically has an average temperature of 22°C (73°F), with highs reaching up to 31°C (88°F) and lows dropping to around 17°C (62°F).
JanFebMarAprMayJunJulAugSepOctNovDec687173757573737372727069
Data source: Temperature data for Union Buenavista generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Union Buenavista

In Union Buenavista in September, the precipitation amount is 313 mm (12.3 in) over the course of 27 days.

September Precipitation Trends in Union Buenavista

The chart displays monthly precipitation patterns in Union Buenavista, 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 Buenavista, September typically receives around 313 mm (12.3 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec757371783591562643132093511
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Union Buenavista

In Union Buenavista in September, humidity is 80%. With an average temperature of 22°C (73°F), this humidity feels like a warm blanket enveloping you, making travel feel a bit sluggish and sticky, yet the vibrant atmosphere invites exploration at a slower pace.

September Average Humidity in Union Buenavista

This chart illustrates the average monthly humidity levels in Union Buenavista, 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 Buenavista is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%68%64%67%74%78%82%82%80%81%80%75%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Union Buenavista

In Union Buenavista in September, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Union Buenavista, you can check here.

Maximum UV Index Levels in Union Buenavista for September

The chart shows the monthly maximum UV Index (UVI) for Union Buenavista 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 Buenavista typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11131415141415141413119
Data source: Union Buenavista 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 Buenavista Compares to Other Months

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

This table compares monthly weather conditions in Union Buenavista, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (69°F)7 mm (0.3 inches)70%extreme
February Weather21°C (71°F)5 mm (0.2 inches)68%extreme
March Weather23°C (73°F)7 mm (0.3 inches)64%extreme
April Weather24°C (76°F)37 mm (1.4 inches)67%extreme
May Weather24°C (76°F)178 mm (7.0 inches)74%extreme
June Weather23°C (73°F)359 mm (14.1 inches)78%extreme
July Weather23°C (74°F)156 mm (6.2 inches)81%extreme
August Weather23°C (73°F)264 mm (10.4 inches)82%extreme
September Weather22°C (73°F)313 mm (12.3 inches)80%extreme
October Weather22°C (72°F)209 mm (8.2 inches)81%extreme
November Weather21°C (70°F)35 mm (1.4 inches)80%extreme
December Weather20°C (69°F)11 mm (0.4 inches)75%very high

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