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May Weather in San Juan, Panama

Last updated: August 27, 2025

In May, the average temperature in San Juan, Panama is a warm 26°C (79°F). Visitors can expect minimum temperatures around 21°C (70°F) and highs reaching up to 35°C (96°F). With an average of 355 mm (14.0 in) of precipitation spread across 27 days, the humidity level hovers around a comfortable 73%. Embrace the vibrant weather and plan your activities accordingly!

May Temperature in San Juan

In May in San Juan, the average temperature is 26°C (79°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 21°C (70°F). This pleasant climate makes San Juan an ideal destination for travelers seeking warmth and outdoor adventure.

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

The chart illustrates May temperature patterns in San Juan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Juan, May typically has an average temperature of 26°C (79°F), with highs reaching up to 35°C (96°F) and lows dropping to around 21°C (70°F).
JanFebMarAprMayJunJulAugSepOctNovDec798081817978787877777778
Data source: Temperature data for San Juan 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 Juan

In San Juan in May, the total precipitation amount is 355 mm (14.0 in) spread over 27 days.

May Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, 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 Juan, May typically receives around 355 mm (14.0 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec3187105355353404359459411385103
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Juan

In San Juan in May, humidity is 73%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable as you navigate through the heat with a constant sheen of sweat on your skin.

May Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, 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 Juan is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec72%71%69%70%73%90%89%87%87%86%86%79%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Juan

In San Juan 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 Juan.

Maximum UV Index Levels in San Juan for May

The chart shows the monthly maximum UV Index (UVI) for San Juan 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 Juan typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121314151513141314141211
Data source: San Juan 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 Juan Compares to Other Months

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

This table compares monthly weather conditions in San Juan, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)31 mm (1.2 inches)72%extreme
February Weather27°C (80°F)8 mm (0.3 inches)71%extreme
March Weather27°C (81°F)7 mm (0.3 inches)69%extreme
April Weather27°C (81°F)105 mm (4.1 inches)70%extreme
May Weather26°C (79°F)355 mm (14.0 inches)73%extreme
June Weather26°C (78°F)353 mm (13.9 inches)90%extreme
July Weather26°C (78°F)404 mm (15.9 inches)88%extreme
August Weather25°C (78°F)359 mm (14.1 inches)87%extreme
September Weather25°C (78°F)459 mm (18.1 inches)87%extreme
October Weather25°C (77°F)410 mm (16.2 inches)86%extreme
November Weather25°C (77°F)385 mm (15.1 inches)86%extreme
December Weather26°C (78°F)103 mm (4.1 inches)79%extreme

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