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July Weather in San Juan, Mexico

Last updated: August 27, 2025

In July, the average temperature in San Juan, Mexico is a pleasant 16°C (62°F). Expect minimal coolness with lows around 8°C (46°F) and comfortable highs reaching 26°C (79°F). However, be prepared for 112 mm (4.4 in) of rain spread over 19 days, contributing to an average humidity of 68%.

July Temperature in San Juan

In July in San Juan, the average temperature is 16°C (62°F). Maximum temperatures can reach 26°C (79°F), while minimums can drop to as low as 8°C (46°F). This is a great time to visit San Juan for travelers seeking mild weather and enjoyable outdoor activities.

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 16°C (62°F), with highs reaching up to 26°C (79°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec545861646563616261595654
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 112 mm (4.4 in) recorded over the course of 19 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 112 mm (4.4 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec9720335014011212914483213
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 68%. With an average temperature of 16°C (62°F), this humidity feels like a soft blanket enveloping you, making the air feel heavier and the day slightly warmer, which can be refreshing yet occasionally stifling for traveling.

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 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%78%75%71%77%76%68%70%82%91%89%88%
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 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 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 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec9121415151515141413108
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)9 mm (0.4 inches)84%very high
February Weather14°C (58°F)7 mm (0.3 inches)78%extreme
March Weather16°C (61°F)20 mm (0.8 inches)75%extreme
April Weather18°C (64°F)33 mm (1.3 inches)70%extreme
May Weather18°C (65°F)50 mm (2.0 inches)77%extreme
June Weather17°C (63°F)139 mm (5.5 inches)76%extreme
July Weather16°C (62°F)112 mm (4.4 inches)68%extreme
August Weather16°C (62°F)129 mm (5.1 inches)70%extreme
September Weather16°C (61°F)144 mm (5.7 inches)82%extreme
October Weather15°C (59°F)83 mm (3.3 inches)91%extreme
November Weather13°C (56°F)21 mm (0.8 inches)89%very high
December Weather12°C (55°F)3 mm (0.1 inches)88%very high

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