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May Weather in San Antonio, Peru

Last updated: August 27, 2025

In May, the average temperature in San Antonio, Peru hovers around 18°C (65°F), creating a mild and pleasant atmosphere. With a minimum of 11°C (53°F) and a maximum of 26°C (79°F), the weather is generally comfortable. Expect zero precipitation, with an average of 0 mm (0.0 in) over 0 days. However, be prepared for relatively high humidity at 88%, which may add to the overall warmth and stickiness of the air.

May Temperature in San Antonio

In May in San Antonio, the average temperature is 18°C (65°F). Maximums can reach 26°C (79°F) and minimums can be as low as 11°C (53°F). This mild climate makes it an ideal time for outdoor activities and exploring the local attractions.

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

The chart illustrates May temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, May typically has an average temperature of 18°C (65°F), with highs reaching up to 26°C (79°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec646464646463636464656464
Data source: Temperature data for San Antonio 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 Antonio

In San Antonio in May, the precipitation amount is 0 mm (0.0 in) during 0 days.

May Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, 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 Antonio, May typically receives around 0 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec8389578001001413
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Antonio

In San Antonio in May, humidity is 88%. With an average temperature of 18°C (65°F), this humidity feels like a warm blanket wrapping around you, making travel feel slightly sticky and the air thick, which can be quite tiring when exploring the area.

May Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, 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 Antonio is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%90%90%91%88%76%61%57%59%75%84%84%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Antonio

In San Antonio in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in San Antonio.

Maximum UV Index Levels in San Antonio for May

The chart shows the monthly maximum UV Index (UVI) for San Antonio 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 Antonio typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec16161514119101214161716
Data source: San Antonio 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 Antonio Compares to Other Months

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

This table compares monthly weather conditions in San Antonio, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (64°F)83 mm (3.3 inches)89%extreme
February Weather18°C (64°F)89 mm (3.5 inches)90%extreme
March Weather18°C (64°F)57 mm (2.3 inches)90%extreme
April Weather18°C (65°F)8 mm (0.3 inches)91%extreme
May Weather18°C (65°F)0 mm (0.0 inches)88%extreme
June Weather17°C (63°F)0 mm (0.0 inches)76%very high
July Weather17°C (63°F)1 mm (0.0 inches)61%very high
August Weather18°C (64°F)0 mm (0.0 inches)57%extreme
September Weather18°C (65°F)0 mm (0.0 inches)58%extreme
October Weather18°C (65°F)1 mm (0.0 inches)75%extreme
November Weather18°C (64°F)4 mm (0.1 inches)83%extreme
December Weather18°C (65°F)13 mm (0.5 inches)84%extreme

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