July weather forecastSan Jose, CA
July
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
July is the month when San Jose sees the highest average temperatures, with a high of 82°F (27.8°C) and a low of 55.2°F (12.9°C).Heat index
For most parts of July, the heat index is calculated to be 84.2°F (29°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.Take into consideration that the heat index values are calculated for shade and light wind conditions. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', integrates the air's temperature and its humidity to showcase the felt temperature by people. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. With the sun shining directly, it's crucial to understand that it can increase the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Humidity
The months with the lowest humidity 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
In San Jose, 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
July has the most sunshine of the year, with an average of 12.1h of sunshine.UV index
The months with the highest UV index are June through August, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The UV index of 6 during July leads to these advisories:
Resist extreme sun exposure. Guarding against solar damage is essential. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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).
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).
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).
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%).
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").
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).
Average daylight in July /
Average sunshine in July
San Jose, CA
- Average daylight in July: 14h and 24min
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 6min
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).
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).
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).
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).
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).
