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July Weather in San Juan, Mexico

Last updated: August 27, 2025

In July, the average temperature in San Juan, Mexico hovers around 24°C (76°F), making it comfortably warm. However, temperatures can vary, with a minimum of 17°C (63°F) and a maximum reaching up to 33°C (92°F). Be prepared for some wet days, as precipitation totals around 217 mm (8.6 in) spread across 23 days, accompanied by an average humidity of 82%.

July Temperature in San Juan

In July in San Juan, the average temperature is 24°C (76°F). Maximum temperatures can reach up to 33°C (92°F), while the minimum can drop to as low as 17°C (63°F). Overall, this climate makes San Juan a comfortable destination for travelers seeking mild weather.

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 24°C (76°F), with highs reaching up to 33°C (92°F) and lows dropping to around 17°C (63°F).
JanFebMarAprMayJunJulAugSepOctNovDec636468727678767675746964
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 217 mm (8.6 in) distributed over 23 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 217 mm (8.6 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec113721273217255166681324
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 82%. With an average temperature of 24°C (76°F), this humidity feels like wearing a warm, damp blanket, making travel uncomfortable and sticky as you explore.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%66%61%56%61%73%82%83%83%79%77%78%
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 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. 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 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710111313121212121186
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 Weather17°C (63°F)11 mm (0.4 inches)74%high
February Weather18°C (65°F)37 mm (1.5 inches)66%very high
March Weather20°C (68°F)2 mm (0.1 inches)61%extreme
April Weather22°C (72°F)1 mm (0.0 inches)56%extreme
May Weather24°C (76°F)2 mm (0.1 inches)61%extreme
June Weather26°C (78°F)73 mm (2.9 inches)73%extreme
July Weather24°C (76°F)217 mm (8.6 inches)82%extreme
August Weather25°C (76°F)255 mm (10.0 inches)83%extreme
September Weather24°C (75°F)166 mm (6.5 inches)83%extreme
October Weather23°C (74°F)68 mm (2.7 inches)78%extreme
November Weather21°C (69°F)13 mm (0.5 inches)77%very high
December Weather18°C (64°F)24 mm (0.9 inches)78%high

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