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May Weather in Union Roja, Mexico

Last updated: August 27, 2025

In May, the average temperature in Union Roja, Mexico is a pleasant 25°C (77°F). Expect a minimum of 18°C (65°F) and a maximum of 34°C (93°F), making it a perfect time for various outdoor activities. However, be prepared for considerable precipitation during this month, totaling 533 mm (21.0 in) over 30 days, and maintain a sense of comfort with an average humidity level of 65%.

May Temperature in Union Roja

In May in Union Roja, the average temperature is 25°C (77°F). Maximums can reach 34°C (93°F), and minimums can be as low as 18°C (65°F). It's a perfect time for travelers to enjoy pleasant weather and outdoor activities.

May Weather in Union Roja: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Union Roja, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Union Roja, May typically has an average temperature of 25°C (77°F), with highs reaching up to 34°C (93°F) and lows dropping to around 18°C (65°F).
JanFebMarAprMayJunJulAugSepOctNovDec737576777775767575757473
Data source: Temperature data for Union Roja 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.

May Precipitation in Union Roja

In Union Roja in May, the precipitation amount is 533 mm (21.0 in) over the course of 30 days.

May Precipitation Trends in Union Roja

The chart displays monthly precipitation patterns in Union Roja, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Union Roja, May typically receives around 533 mm (21.0 inches) of precipitation spread over approximately 30 days.
JanFebMarAprMayJunJulAugSepOctNovDec27153812053355346059068365827648
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Union Roja

In Union Roja in May, humidity is 65%. With an average temperature of 25°C (77°F), this humidity feels like a warm embrace, making outdoor activities slightly uncomfortable but still bearable, as the sticky air clings to your skin and encourages you to seek shade or a refreshing drink.

May Average Humidity in Union Roja

This chart illustrates the average monthly humidity levels in Union Roja, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Union Roja is approximately 65%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%68%59%57%65%66%75%82%82%83%80%76%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Union Roja

In Union Roja in May, 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 Roja, you can check here.

Maximum UV Index Levels in Union Roja for May

The chart shows the monthly maximum UV Index (UVI) for Union Roja in May, 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 May, the maximum UV index in Union Roja typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141414131413109
Data source: Union Roja May 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 May Weather in Union Roja Compares to Other Months

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

This table compares monthly weather conditions in Union Roja, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (73°F)27 mm (1.0 inches)76%very high
February Weather24°C (75°F)15 mm (0.6 inches)68%extreme
March Weather24°C (76°F)38 mm (1.5 inches)59%extreme
April Weather25°C (78°F)120 mm (4.7 inches)57%extreme
May Weather25°C (77°F)533 mm (21.0 inches)65%extreme
June Weather24°C (76°F)553 mm (21.8 inches)66%extreme
July Weather24°C (76°F)460 mm (18.1 inches)75%extreme
August Weather24°C (76°F)590 mm (23.2 inches)82%extreme
September Weather24°C (75°F)683 mm (26.9 inches)82%extreme
October Weather24°C (75°F)658 mm (25.9 inches)83%extreme
November Weather23°C (74°F)276 mm (10.9 inches)80%very high
December Weather23°C (73°F)48 mm (1.9 inches)76%very high

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