July weather forecast and climate
San Jose, CA

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, like June, in San Jose, California, is a moderately hot summer month, with average temperature varying between 55.2°F (12.9°C) and 82°F (27.8°C).

Temperature

July is the warmest month, with an average high-temperature of 82°F (27.8°C) and an average low-temperature of 55.2°F (12.9°C).

Heat index

In July, the average heat index is appraised at 84.6°F (29.2°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (pregnancy, metabolic differences, wind). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

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

Rainfall

June through August are months with the least rain in San Jose when the rain falls for 1.2 days and typically aggregates up to 0.04" (1mm) of rain.

Daylight

In San Jose, the average length of the day in July is 14.4h.

Sunshine

The month with the most sunshine is July, with an average of 12.1h of sunshine.

UV index

Months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 6 in July transform into the following instructions:
Take precautions against overexposure. Protection against sun damage is needed. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the warmest month in San Jose?

With an average high-temperature of 82°F (27.8°C) and an average low-temperature of 55.2°F (12.9°C), July is the warmest month.

What is the temperature in July in San Jose?

In July, in San Jose, California, the average high-temperature is 82°F (27.8°C), and the average low-temperature is 55.2°F (12.9°C). In July, the average heat index (a.k.a. 'apparent temperature', 'real feel'), that combines relative humidity and air temperature, is evaluated at 84.6°F (29.2°C).

What is the least humid month in San Jose?

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

What is the average humidity in July in San Jose?

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

How much does it rain in San Jose in July?

In July, the rain falls for 1.2 days. Throughout July, 0.04" (1mm) of precipitation is accumulated.

What is the driest month in San Jose?

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

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

In San Jose, California, the average length of the day in July is 14.4h.

What month has the most sunshine in San Jose?

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

How many hours of sunshine does San Jose have in July?

In July, the average sunshine is 12.1h.

When is the highest UV index in San Jose?

Months with the highest UV index are June through August, with an average maximum UV index of 6.

How high is the UV index in July in San Jose?

In San Jose, California, the average daily maximum UV index in July is 6. A UV Index reading of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.

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"

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

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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%).
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: 14.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in July: 12.1h

The month with the most sunshine is July (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 6h).

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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

Months with the highest UV index are June, July and August (UV index 6).
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

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

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