July Weather in South San Francisco, United States

Last updated: June 24, 2025

In July, the average temperature in South San Francisco, United States hovers around 15°C (60°F), creating a mild atmosphere. You can expect a minimum of 11°C (52°F) and a peak temperature reaching 24°C (76°F). With only 3 mm (0.1 in) of precipitation over 0 days, the month remains predominantly dry, while the average humidity is a cozy 87%. Perfect weather for outdoor adventures!

July Temperature in South San Francisco

In July in South San Francisco, the average temperature is 15°C (60°F). The maximum can reach 24°C (76°F), and the minimum can be as low as 11°C (52°F). This mild climate makes South San Francisco an ideal destination for outdoor activities and leisurely exploration.

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

The chart illustrates July temperature patterns in South 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 South San Francisco, July typically has an average temperature of 15°C (60°F), with highs reaching up to 24°C (76°F) and lows dropping to around 11°C (52°F).

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

July Precipitation in South San Francisco

In South San Francisco in July, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

July Precipitation Trends in South San Francisco

The chart displays monthly precipitation patterns in South 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 South San Francisco, July typically receives around 3 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 South San Francisco

In South San Francisco in July humidity is 87%. With an average temperature of 15°C (60°F), this humidity feels like you're wrapped in a damp blanket, making it a challenge for travelers to stay comfortable and energetic.

July Average Humidity in South San Francisco

This chart illustrates the average monthly humidity levels in South 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 South San Francisco is approximately 87%, 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 South San Francisco

In South San Francisco in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in South San Francisco.

Maximum UV Index Levels in South San Francisco for July

The chart shows the monthly maximum UV Index (UVI) for South 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 South San Francisco typically reaches 11, which falls under the extreme exposure category.

Data source: South 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 South San Francisco Compares to Other Months

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

This table compares monthly weather conditions in South 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	11°C (52°F)	106 mm (4.2 inches)	85%	moderate
February Weather	11°C (52°F)	109 mm (4.3 inches)	82%	moderate
March Weather	12°C (53°F)	78 mm (3.1 inches)	82%	very high
April Weather	13°C (55°F)	35 mm (1.4 inches)	79%	very high
May Weather	14°C (57°F)	20 mm (0.8 inches)	83%	very high
June Weather	15°C (60°F)	3 mm (0.1 inches)	84%	extreme
July Weather	15°C (60°F)	3 mm (0.1 inches)	87%	extreme
August Weather	16°C (61°F)	2 mm (0.1 inches)	87%	very high
September Weather	17°C (63°F)	2 mm (0.1 inches)	86%	very high
October Weather	16°C (60°F)	30 mm (1.2 inches)	80%	high
November Weather	13°C (56°F)	50 mm (2.0 inches)	79%	moderate
December Weather	11°C (52°F)	95 mm (3.7 inches)	79%	moderate