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May Weather in San Antonio, Panama

Last updated: August 27, 2025

In San Antonio, Panama, the average temperature in May hovers around 27°C (81°F), with a range that can dip as low as 23°C (73°F) and soar up to 37°C (99°F). Expect 295 mm (11.6 in) of rain spread over 28 days, resulting in a high average humidity of 78%. Be prepared for a warm and wet month!

May Temperature in San Antonio

In May in San Antonio, the average temperature is 27°C (81°F). Maximums can reach 37°C (99°F) and minimums can be as low as 23°C (73°F). This warm weather makes San Antonio an ideal destination for travelers seeking a sunny getaway.

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 27°C (81°F), with highs reaching up to 37°C (99°F) and lows dropping to around 23°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec808283838180808079797980
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 total precipitation amount is 295 mm (11.6 in) over the course of 28 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 295 mm (11.6 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec29987929530329027531434428095
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 78%. With an average temperature of 27°C (81°F), this humidity feels like a warm, heavy embrace that makes traveling feel both invigorating and exhausting. Moments spent outside can quickly become clammy and uncomfortable, urging travelers to seek shade and hydration as they explore.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%74%76%78%83%80%79%78%77%79%79%
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 an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, 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 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121314151513131313131210
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 Weather27°C (80°F)29 mm (1.1 inches)76%extreme
February Weather28°C (82°F)9 mm (0.4 inches)75%extreme
March Weather28°C (83°F)8 mm (0.3 inches)74%extreme
April Weather28°C (83°F)79 mm (3.1 inches)76%extreme
May Weather27°C (81°F)295 mm (11.6 inches)78%extreme
June Weather27°C (80°F)303 mm (11.9 inches)83%extreme
July Weather27°C (80°F)290 mm (11.4 inches)79%extreme
August Weather27°C (80°F)275 mm (10.8 inches)79%extreme
September Weather26°C (80°F)314 mm (12.4 inches)78%extreme
October Weather26°C (79°F)343 mm (13.5 inches)77%extreme
November Weather26°C (79°F)280 mm (11.0 inches)79%extreme
December Weather27°C (80°F)95 mm (3.7 inches)79%very high

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