July weather forecast
San Jose, CA

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A sunset panorama of the lit city of San Jose, California
A sunset panorama of the lit city of San Jose, California

Weather in July

July, being the heart of the summer season in San Jose, witnesses the peak of temperatures. Maximum temperatures climb up to 82°F (27.8°C) while the month enjoys a relatively clear sky with only 6% cloud cover. Despite experiencing the highest temperatures, the month also sees lower wind speeds, barely reaching 4.7mph (7.6km/h). A quintessential summer climate is fully established, creating an ideal time for various outdoor activities.

Temperature

San Jose's warmest month, July, generally records average temperatures ranging from a high of 82°F (27.8°C) to a low of 55.2°F (12.9°C).

Heat index

In July, the average heat index is evaluated at 84.2°F (29°C). Persistent activity under exposure might lead to a feeling of weariness, with subsequent heat cramps.
Heat index values are typically calculated for conditions of shade and a light breeze. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. The influence of weather can be personal, changing with an individual's body mass, height, and level of physical exertion. Given direct exposure to sunlight, one might experience a rise in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.

Humidity

The months with the lowest humidity in San Jose are July and September, with an average relative humidity of 60%.

Rainfall

The months with the least rainfall are June through August Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.

Daylight

The average length of the day in July is 14h and 26min.
On the first day of the month, sunrise is at 5:51 am and sunset at 8:32 pm. On the last day of July, sunrise is at 6:11 am and sunset at 8:15 pm PDT.

Sunshine

With an average of 12.1h of sunshine, July has the most sunshine of the year.

UV index

June through August, with an average maximum UV index of 6, are months with the highest UV index in San Jose. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: A maximum high UV index of 6 in July translates into the following recommendations:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Seek shade and limit direct Sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its peak, but be aware that not all shade structures provide complete sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Frequently asked questions

What is the hottest time of year in San Jose?

San Jose, California, records the warmest temperatures in July, averaging a high of 82°F (27.8°C) and a low of 55.2°F (12.9°C).

What is the average July temperature in San Jose?

An average high-temperature, in July, in San Jose, is 82°F (27.8°C) and the average low-temperature is 55.2°F (12.9°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in July is evaluated at 84.2°F (29°C).

What is the least humid month in San Jose?

The months with the lowest humidity in San Jose are July and September, with an average relative humidity of 60%.

What is the average humidity in July in San Jose?

In San Jose, the average relative humidity in July is 60%.

What is the driest month in San Jose?

The months with the least rainfall in San Jose are June through August Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.

How much does it rain in San Jose in July?

In San Jose, California, in July, it is raining for 1.2 days, with typically 0.04" (1mm) of accumulated precipitation.

What is the average length of the day in July in San Jose?

In July, the average day length in San Jose, California, is 14h and 26min.

What time are sunrise and sunset in July in San Jose?

In July, on the first day of the month, sunrise is at 5:51 am and sunset at 8:32 pm. On the last day of the month, in San Jose, California, sunrise is at 6:11 am and sunset at 8:15 pm PDT.

What month has the most sunshine in San Jose?

With an average of 12.1h of sunshine, July has the most sunshine of the year in San Jose, California.

How long on average sun shines in July in San Jose?

The average sunshine duration in July in San Jose is 12.1h.

What are the months with the highest UV index in San Jose?

The months with the highest UV index in San Jose are June through August, with an average maximum UV index of 6.

What is the UV index reading in July in San Jose?

In July, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
San Jose, CA

Average temperature in July - San Jose, CA
  • Average high temperature in July: 82°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is December (56.5°F).

  • Average low temperature in July: 55.2°F

The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is December (43°F).

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Average pressure in July
San Jose, CA

Average pressure in July - San Jose, CA
  • Average pressure in July: 29.93"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).

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Average wind speed in July
San Jose, CA

Average wind speed in July - San Jose, CA
  • Average wind speed in July: 4.7mph

The windiest months (with the highest average wind speed) are April and May (5.8mph).
The calmest months (with the lowest average wind speed) are September and October (4.4mph).

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Average humidity in July
San Jose, CA

Average humidity in July - San Jose, CA
  • Average humidity in July: 60%

The month with the highest relative humidity is March (73%).
The months with the lowest relative humidity are July and September (60%).

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Average rainfall in July
San Jose, CA

Average rainfall in July - San Jose, CA
  • Average rainfall in July: 0.04"

The wettest month (with the highest rainfall) is March (0.83").
The driest months (with the least rainfall) are June, July and August (0.04").

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Average rainfall days in July
San Jose, CA

Average rainfall days in July - San Jose, CA
  • Average rainfall days in July: 1.2 days

The month with the highest number of rainy days is March (9.8 days).
The month with the least rainy days is August (0.4 days).

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Average daylight in July /
Average sunshine in July
San Jose, CA

Average daylight in July / Average sunshine in July - San Jose, CA
  • Average daylight in July: 14h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in July: 12h and 1min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).

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Average sunshine days in July
San Jose, CA

Average sunshine days in July - San Jose, CA
  • Average sunshine days in July: 28.6 days

The month with the most sunshine days is August (29.7 days).
The month with the least sunshine days is March (19.5 days).

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Average UV index in July
San Jose, CA

Average UV index in July - San Jose, CA
  • Average UV index in July: 6

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in July
San Jose, CA

Average cloud cover in July - San Jose, CA
  • Average cloud cover in July: 6

The month with the most cloud cover is March (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 6).

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Average visibility in July
San Jose, CA

Average visibility in July - San Jose, CA
  • Average visibility in July: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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San Jose, California, USA

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