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May Weather in San Bartolo, Mexico

Last updated: August 27, 2025

In San Bartolo, Mexico, the average temperature in May is a warm 26°C (79°F). However, be prepared for a range, as it can dip to a minimum of 13°C (56°F) or soar to a sweltering 40°C (105°F). During this time, expect about 52 mm (2.1 in) of precipitation over 12 days, and enjoy the lush atmosphere with an average humidity level of 75%.

May Temperature in San Bartolo

In May in San Bartolo, the average temperature is 26°C (79°F), with maximums reaching 40°C (105°F) and minimums dropping as low as 13°C (56°F). This range makes it essential for travelers to pack both light clothing for the heat and warmer layers for the cooler nights.

May Weather in San Bartolo: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in San Bartolo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Bartolo, May typically has an average temperature of 26°C (79°F), with highs reaching up to 40°C (105°F) and lows dropping to around 13°C (56°F).
JanFebMarAprMayJunJulAugSepOctNovDec616570757978777775726662
Data source: Temperature data for San Bartolo 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 San Bartolo

In San Bartolo in May, the precipitation amount is 52 mm (2.1 in) occurring over a span of 12 days.

May Precipitation Trends in San Bartolo

The chart displays monthly precipitation patterns in San Bartolo, 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 San Bartolo, May typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec232029225275725390942918
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Bartolo

In San Bartolo in May, humidity is 75%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapped around you, making traveling a sticky experience where every step requires extra effort and frequent breaks to cool off.

May Average Humidity in San Bartolo

This chart illustrates the average monthly humidity levels in San Bartolo, 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 San Bartolo is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%69%65%64%75%78%67%64%82%86%87%87%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Bartolo

In San Bartolo 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 San Bartolo, you can check here.

Maximum UV Index Levels in San Bartolo for May

The chart shows the monthly maximum UV Index (UVI) for San Bartolo 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 San Bartolo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810131314131413131297
Data source: San Bartolo 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 San Bartolo Compares to Other Months

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

This table compares monthly weather conditions in San Bartolo, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)23 mm (0.9 inches)75%very high
February Weather18°C (65°F)20 mm (0.8 inches)69%very high
March Weather21°C (70°F)29 mm (1.1 inches)65%extreme
April Weather24°C (75°F)22 mm (0.9 inches)64%extreme
May Weather26°C (79°F)52 mm (2.1 inches)75%extreme
June Weather26°C (78°F)75 mm (3.0 inches)78%extreme
July Weather25°C (78°F)72 mm (2.8 inches)67%extreme
August Weather25°C (78°F)53 mm (2.1 inches)64%extreme
September Weather24°C (76°F)90 mm (3.6 inches)81%extreme
October Weather22°C (72°F)94 mm (3.7 inches)85%extreme
November Weather19°C (66°F)29 mm (1.1 inches)87%very high
December Weather17°C (62°F)18 mm (0.7 inches)87%high

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