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July Weather in San Juan, Peru

Last updated: August 27, 2025

In San Juan, Peru, the average temperature in July hovers around 12°C (54°F). You'll experience a chill with minimum temperatures dipping to 4°C (39°F), while highs can reach a pleasant 22°C (71°F). Be prepared for precipitation as well, with around 43 mm (1.7 in) spread over 8 days. Humidity levels average 44%, making for a refreshing atmosphere.

July Temperature in San Juan

In July in San Juan, the average temperature is 12°C (54°F). The maximum can reach 22°C (71°F), and the minimum can be as low as 4°C (39°F). This mild climate makes San Juan an ideal destination for travelers looking to explore comfortably during this time of year.

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

The chart illustrates July 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, July typically has an average temperature of 12°C (54°F), with highs reaching up to 22°C (71°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec545453545454545454545454
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.

July Precipitation in San Juan

In San Juan in July, the total precipitation amount is 43 mm (1.7 in) over the course of 8 days.

July Precipitation Trends in San Juan

The chart displays monthly precipitation patterns in San Juan, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In San Juan, July typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec304392599349189704348154299290413
Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.
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July Humidity in San Juan

In San Juan in July, humidity is 44%. With an average temperature of 12°C (54°F), this humidity feels like a refreshing coolness that invigorates your senses while traveling, making it a pleasant experience for outdoor explorations.

July Average Humidity in San Juan

This chart illustrates the average monthly humidity levels in San Juan, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in San Juan is approximately 44%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%88%85%78%62%44%38%42%58%69%82%
Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Juan

In San Juan in July, 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 July

The chart shows the monthly maximum UV Index (UVI) for San Juan in July, 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 July, the maximum UV index in San Juan typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec171819181513141417181616
Data source: San Juan July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)304 mm (12.0 inches)83%extreme
February Weather12°C (54°F)392 mm (15.4 inches)81%extreme
March Weather12°C (53°F)599 mm (23.6 inches)88%extreme
April Weather12°C (54°F)348 mm (13.7 inches)85%extreme
May Weather12°C (54°F)188 mm (7.4 inches)78%extreme
June Weather12°C (54°F)70 mm (2.8 inches)62%extreme
July Weather12°C (54°F)43 mm (1.7 inches)44%extreme
August Weather12°C (55°F)47 mm (1.9 inches)38%extreme
September Weather12°C (54°F)154 mm (6.1 inches)42%extreme
October Weather12°C (54°F)299 mm (11.8 inches)58%extreme
November Weather12°C (54°F)290 mm (11.4 inches)69%extreme
December Weather12°C (54°F)413 mm (16.2 inches)82%extreme

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