July Weather in San Francisco, Mexico

Last updated: August 27, 2025

In July, the average temperature in San Francisco, Mexico is a warm 26°C (79°F). While you can expect a comfortable minimum of 15°C (59°F), be prepared for days that can reach a scorching maximum of 41°C (105°F). With just 2 mm (0.1 in) of precipitation over 0 days, it's a dry month, and the average humidity hovers around 63%, adding to the summer feel.

July Temperature in San Francisco

In July in San Francisco, the average temperature is 26°C (79°F). Maximums can reach 41°C (105°F), and minimums can be as low as 15°C (59°F). Travelers should be prepared for hot days and cooler evenings, making it advisable to pack both light clothing for the heat and a light jacket for the cooler nights.

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

The chart illustrates July temperature patterns in San Francisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Francisco, July typically has an average temperature of 26°C (79°F), with highs reaching up to 41°C (105°F) and lows dropping to around 15°C (59°F).

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

July Precipitation in San Francisco

In San Francisco in July, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

July Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, 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 Francisco, July typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 days.

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

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Millimeters (mm) Inches (in)

July Humidity in San Francisco

In San Francisco in July humidity is 63%. With average temperature 26°C (79°F), this humidity feels like a warm embrace, making it perfect for leisurely strolls or exploring local attractions, though be prepared for a slight stickiness that may prompt you to seek shade or refreshing beverages along the way.

July Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, 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 Francisco is approximately 63%, 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 Francisco

In San Francisco 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 Francisco.

Maximum UV Index Levels in San Francisco for July

The chart shows the monthly maximum UV Index (UVI) for San Francisco 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 Francisco typically reaches 12, which falls under the extreme exposure category.

Data source: San Francisco 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 Francisco Compares to Other Months

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

This table compares monthly weather conditions in San Francisco, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	16°C (61°F)	12 mm (0.5 inches)	71%	high
February Weather	16°C (62°F)	10 mm (0.4 inches)	69%	very high
March Weather	17°C (64°F)	14 mm (0.6 inches)	61%	very high
April Weather	19°C (67°F)	1 mm (0.0 inches)	58%	extreme
May Weather	19°C (67°F)	1 mm (0.0 inches)	61%	extreme
June Weather	22°C (72°F)	1 mm (0.0 inches)	61%	extreme
July Weather	26°C (79°F)	2 mm (0.1 inches)	63%	extreme
August Weather	27°C (81°F)	2 mm (0.1 inches)	70%	extreme
September Weather	26°C (79°F)	11 mm (0.4 inches)	75%	extreme
October Weather	23°C (74°F)	9 mm (0.4 inches)	71%	very high
November Weather	20°C (68°F)	15 mm (0.6 inches)	72%	high
December Weather	16°C (62°F)	12 mm (0.5 inches)	72%	moderate