July Weather in San Jose, United States

Last updated: June 24, 2025

In July, the average temperature in San Jose, United States reaches a warm 30°C (86°F), with daily fluctuations ranging from a minimum of 18°C (66°F) to a sweltering maximum of 42°C (108°F). During this month, expect about 45 mm (1.8 in) of precipitation spread over 8 days, resulting in an overall average humidity of 43%.

July Temperature in San Jose

In July in San Jose, the average temperature is 30°C (86°F). Maximums can reach 42°C (108°F), while minimums can drop to as low as 18°C (66°F). Travelers can expect warm to hot weather, so it's advisable to pack light clothing and stay hydrated.

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

The chart illustrates July temperature patterns in San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose, July typically has an average temperature of 30°C (86°F), with highs reaching up to 42°C (108°F) and lows dropping to around 18°C (66°F).

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

July Precipitation in San Jose

In San Jose in July, the precipitation amount is 45 mm (1.8 in) over the course of 8 days.

July Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, 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 Jose, July typically receives around 45 mm (1.8 inches) of precipitation spread over approximately 8 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 Jose

In San Jose in July, humidity is 43%. With an average temperature of 30°C (86°F), this humidity feels like a warm embrace, making travel enjoyable yet requiring a bit of caution. It's the perfect balance, inviting you to explore while reminding you to stay hydrated and take breaks in the shade.

July Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, 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 Jose is approximately 43%, 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 Jose

In San Jose 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 Jose.

Maximum UV Index Levels in San Jose for July

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

Data source: San Jose 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 Jose Compares to Other Months

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

This table compares monthly weather conditions in San Jose, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	23 mm (0.9 inches)	81%	moderate
February Weather	10°C (50°F)	32 mm (1.2 inches)	82%	high
March Weather	15°C (59°F)	16 mm (0.6 inches)	68%	very high
April Weather	20°C (68°F)	2 mm (0.1 inches)	55%	extreme
May Weather	24°C (76°F)	3 mm (0.1 inches)	45%	extreme
June Weather	30°C (86°F)	4 mm (0.2 inches)	37%	extreme
July Weather	30°C (86°F)	45 mm (1.8 inches)	43%	extreme
August Weather	29°C (85°F)	22 mm (0.9 inches)	53%	extreme
September Weather	26°C (79°F)	28 mm (1.1 inches)	66%	extreme
October Weather	20°C (68°F)	13 mm (0.5 inches)	72%	very high
November Weather	14°C (58°F)	20 mm (0.8 inches)	81%	high
December Weather	9°C (48°F)	25 mm (1.0 inches)	84%	moderate