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May Weather in Santo Tomas, Mexico

Last updated: August 27, 2025

In May, the average temperature in Santo Tomas, Mexico reaches a pleasant 26°C (78°F). Temperatures can vary, with a minimum of 17°C (64°F) and a maximum soaring to 36°C (97°F). Expect moderate rainfall, with 131 mm (5.2 in) of precipitation over 19 days and an average humidity of 72%.

May Temperature in Santo Tomas

In May in Santo Tomas, the average temperature is 26°C (78°F). Maximum temperatures can reach 36°C (97°F), while minimums can dip as low as 17°C (64°F). It's an ideal time for travelers to enjoy warm weather while also being prepared for cooler evenings.

May Weather in Santo Tomas: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Santo Tomas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santo Tomas, May typically has an average temperature of 26°C (78°F), with highs reaching up to 36°C (97°F) and lows dropping to around 17°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec676972767877777776757068
Data source: Temperature data for Santo Tomas 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 Santo Tomas

In Santo Tomas in May, the total precipitation amount reached 131 mm (5.2 in) over the course of 19 days.

May Precipitation Trends in Santo Tomas

The chart displays monthly precipitation patterns in Santo Tomas, 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 Santo Tomas, May typically receives around 131 mm (5.2 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec119113105101131368171261387346219104
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Santo Tomas

In Santo Tomas in May, humidity is 72%. With an average temperature of 26°C (78°F), this humidity feels like a warm, enveloping blanket that can leave travelers feeling sticky and slightly fatigued, making it essential to stay hydrated and take breaks in the shade.

May Average Humidity in Santo Tomas

This chart illustrates the average monthly humidity levels in Santo Tomas, 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 Santo Tomas is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%80%73%67%72%73%76%80%84%89%88%88%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Santo Tomas

In Santo Tomas in May, 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 Santo Tomas.

Maximum UV Index Levels in Santo Tomas for May

The chart shows the monthly maximum UV Index (UVI) for Santo Tomas 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 Santo Tomas typically reaches 13, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911121313141413131298
Data source: Santo Tomas 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 Santo Tomas Compares to Other Months

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

This table compares monthly weather conditions in Santo Tomas, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (67°F)119 mm (4.7 inches)84%very high
February Weather21°C (69°F)113 mm (4.5 inches)80%extreme
March Weather22°C (72°F)105 mm (4.1 inches)73%extreme
April Weather24°C (76°F)101 mm (4.0 inches)67%extreme
May Weather26°C (78°F)131 mm (5.2 inches)72%extreme
June Weather25°C (77°F)368 mm (14.5 inches)73%extreme
July Weather25°C (77°F)171 mm (6.7 inches)76%extreme
August Weather25°C (77°F)261 mm (10.3 inches)80%extreme
September Weather25°C (77°F)386 mm (15.2 inches)84%extreme
October Weather24°C (75°F)346 mm (13.6 inches)89%extreme
November Weather21°C (70°F)219 mm (8.6 inches)88%very high
December Weather20°C (68°F)104 mm (4.1 inches)88%very high

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