nomadseason

August Weather in San Juan, Peru

Last updated: August 27, 2025

In August, the average temperature in San Juan, Peru hovers around 13°C (55°F). Expect a minimum drop to 4°C (40°F) and a pleasant maximum reaching 19°C (66°F). Rainfall is moderate, with 26 mm (1.0 in) expected over 9 days. The air remains comfortably crisp, with an average humidity of 50%.

August Temperature in San Juan

In August in San Juan, the average temperature is 13°C (55°F), with maximums reaching up to 19°C (66°F) and minimums dropping as low as 4°C (40°F). This mild weather makes it a great time for travelers to explore the beauty of San Juan.

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 13°C (55°F), with highs reaching up to 19°C (66°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec545555555454555555555555
Data source: Temperature data for San Juan generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 26 mm (1.0 in) spread over 9 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 26 mm (1.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec22924424612560231926729976129
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

August Humidity in San Juan

In San Juan in August humidity is 50%. With an average temperature of 13°C (55°F), this humidity feels like a cool, crisp breeze that invigorates your senses, making it perfect for outdoor exploration and leisurely strolls without the discomfort of sweltering heat.

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 50%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%89%90%89%83%69%56%51%53%68%82%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec181918171411131416181818
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 Weather12°C (55°F)229 mm (9.0 inches)89%extreme
February Weather13°C (55°F)244 mm (9.6 inches)89%extreme
March Weather13°C (55°F)246 mm (9.7 inches)90%extreme
April Weather13°C (55°F)125 mm (4.9 inches)89%extreme
May Weather12°C (55°F)60 mm (2.3 inches)83%extreme
June Weather12°C (55°F)23 mm (0.9 inches)69%extreme
July Weather13°C (55°F)19 mm (0.7 inches)56%extreme
August Weather13°C (55°F)26 mm (1.0 inches)50%extreme
September Weather13°C (56°F)72 mm (2.9 inches)53%extreme
October Weather13°C (55°F)99 mm (3.9 inches)68%extreme
November Weather13°C (56°F)76 mm (3.0 inches)81%extreme
December Weather13°C (55°F)129 mm (5.1 inches)87%extreme

Compare San Juan's Climate with Cities Worldwide