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August Weather in San Juan, Panama

Last updated: August 27, 2025

In August, the average temperature in San Juan, Panama hovers around a pleasant 26°C (78°F), with minimums dropping to 22°C (73°F) and maximums reaching 30°C (87°F). However, be prepared for a fair amount of rain, as 559 mm (22.0 in) of precipitation graces the area over 31 days. With an average humidity level of 87%, the air is quite moist, adding to the tropical atmosphere of this vibrant locale.

August Temperature in San Juan

In August in San Juan, the average temperature is 26°C (78°F). Maximums can reach 30°C (87°F), while minimums can drop to as low as 22°C (73°F). This mild and pleasant weather makes it an ideal time for traveling.

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

The chart illustrates August 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, August typically has an average temperature of 26°C (78°F), with highs reaching up to 30°C (87°F) and lows dropping to around 22°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec798081807978787878777778
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.

August Precipitation in San Juan

In San Juan in August, the total precipitation amount is 559 mm (22.0 in) over the course of 31 days.

August Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In San Juan, August typically receives around 559 mm (22.0 inches) of precipitation spread over approximately 31 days.
JanFebMarAprMayJunJulAugSepOctNovDec572126267566529587559562639608185
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in San Juan

In San Juan in August humidity is 87%. With an average temperature of 26°C (78°F), this humidity feels like walking through a warm, damp blanket, making outdoor activities tiring and sweat-inducing for travelers.

August Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in San Juan is approximately 87%, 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 August generated using information from the Copernicus Climate Change Service.

August UV Index in San Juan

In San Juan in August, 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 Juan, you can check here.

Maximum UV Index Levels in San Juan for August

The chart shows the monthly maximum UV Index (UVI) for San Juan in August, 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 August, the maximum UV index in San Juan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121314151514141414141211
Data source: San Juan August 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 August 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 August’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 August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (79°F)57 mm (2.3 inches)72%extreme
February Weather27°C (80°F)21 mm (0.8 inches)71%extreme
March Weather27°C (81°F)26 mm (1.0 inches)69%extreme
April Weather26°C (80°F)267 mm (10.5 inches)70%extreme
May Weather26°C (79°F)566 mm (22.3 inches)73%extreme
June Weather26°C (79°F)529 mm (20.8 inches)90%extreme
July Weather26°C (79°F)587 mm (23.1 inches)88%extreme
August Weather26°C (78°F)559 mm (22.0 inches)87%extreme
September Weather25°C (78°F)562 mm (22.1 inches)87%extreme
October Weather25°C (78°F)639 mm (25.2 inches)86%extreme
November Weather25°C (77°F)608 mm (23.9 inches)86%extreme
December Weather26°C (79°F)185 mm (7.3 inches)79%extreme

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