July Weather in San Diego, Mexico

Last updated: August 27, 2025

In July, the average temperature in San Diego, Mexico hovers around 16°C (60°F), with fluctuations ranging between a minimum of 8°C (47°F) and a maximum of 25°C (77°F). During this period, the region experiences precipitation totaling 324 mm (12.8 in) over 30 days, accompanied by an average humidity level of 68%.

July Temperature in San Diego

In July in San Diego, the average temperature is 16°C (60°F). Maximum temperatures can reach 25°C (77°F), while minimums can drop to as low as 8°C (47°F). It's a pleasant time for traveling, offering comfortable weather for outdoor activities and sightseeing.

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

The chart illustrates July temperature patterns in San Diego, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Diego, July typically has an average temperature of 16°C (60°F), with highs reaching up to 25°C (77°F) and lows dropping to around 8°C (47°F).

Data source: Temperature data for San Diego generated using information from the Copernicus Climate Change Service.

July Precipitation in San Diego

In San Diego in July, the precipitation amount is 324 mm (12.8 in) over a span of 30 days.

July Precipitation Trends in San Diego

The chart displays monthly precipitation patterns in San Diego, 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 Diego, July typically receives around 324 mm (12.8 inches) of precipitation spread over approximately 30 days.

Data source: Precipitation data for July generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in San Diego

In San Diego in July, humidity is 68%. With an average temperature of 16°C (60°F), this humidity feels like a warm embrace, making traveling slightly more strenuous as the air thickens around you, prompting you to stay hydrated and take breaks in cooler, shaded areas.

July Average Humidity in San Diego

This chart illustrates the average monthly humidity levels in San Diego, 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 Diego is approximately 68%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in San Diego

In San Diego 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 Diego, you can check here.

Maximum UV Index Levels in San Diego for July

The chart shows the monthly maximum UV Index (UVI) for San Diego 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 Diego typically reaches 14, which falls under the extreme exposure category.

Data source: San Diego 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 Diego Compares to Other Months

Weather in San Diego varies notably across the year, with each month offering distinct climate conditions. This page compares July’s weather to other months in San Diego, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Diego, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	15 mm (0.6 inches)	84%	very high
February Weather	13°C (56°F)	17 mm (0.7 inches)	78%	extreme
March Weather	15°C (60°F)	37 mm (1.5 inches)	75%	extreme
April Weather	16°C (62°F)	55 mm (2.2 inches)	70%	extreme
May Weather	17°C (63°F)	200 mm (7.9 inches)	77%	extreme
June Weather	16°C (61°F)	422 mm (16.6 inches)	76%	extreme
July Weather	16°C (60°F)	324 mm (12.8 inches)	68%	extreme
August Weather	16°C (60°F)	401 mm (15.8 inches)	70%	extreme
September Weather	15°C (60°F)	362 mm (14.2 inches)	82%	extreme
October Weather	15°C (59°F)	215 mm (8.5 inches)	91%	extreme
November Weather	14°C (57°F)	60 mm (2.4 inches)	89%	very high
December Weather	12°C (54°F)	14 mm (0.5 inches)	88%	very high