July weather forecastSan Diego, CA
July
Weather in July
July is a standout month for San Diego, boasting the hottest temperatures of the year, peaking at an average high of 75.4°F (24.1°C). It is the epitome of summer weather with hot days and warm, comfortable nights. This month embraces quality beach weather, and it offers some of the year's best conditions for water sports. The increased humidity might not be favorable for everyone, but with hot, clear, sunny days persisting, there's enough to keep everyone entertained. The city is buzzing with summer activities, making July one of the most active months in San Diego.Temperature
San Diego, California, experiences an average high-temperature of a moderately hot 75.4°F (24.1°C) with the onset of July, subtly varied from June's 70.7°F (21.5°C). In San Diego, the average nighttime temperature during July is an enjoyable 64.2°F (17.9°C).Humidity
In July, the average relative humidity in San Diego is 72%.Rainfall
In San Diego, during July, the rain falls for 5.4 days and regularly aggregates up to 0.51" (13mm) of precipitation. In San Diego, during the entire year, the rain falls for 61.8 days and collects up to 8.7" (221mm) of precipitation.Ocean temperature
In July, the average ocean temperature is 67.1°F (19.5°C).Note: Most people find swimming in 67.1°F (19.5°C) unenjoyable. As the water temperature falls from 69.8°F (21°C) to 59°F (15°C), controlling one's breathing becomes harder.
Daylight
The average length of the day in July in San Diego is 14h and 4min.On the first day of the month, sunrise is at 5:44 am and sunset at 8:00 pm. On the last day of July, in San Diego, sunrise is at 6:02 am and sunset at 7:47 pm PDT.
Sunshine
The months with the most sunshine are July and August, with an average of 11.9h of sunshine.UV index
July through September, with an average maximum UV index of 6, are months with the highest UV index in San Diego. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: The UV index of 6 during July translates into the following guidance:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in July
San Diego, CA
- Average high temperature in July: 75.4°F
The warmest month (with the highest average high temperature) is August (77.4°F).
The month with the lowest average high temperature is February (63.1°F).
- Average low temperature in July: 64.2°F
The month with the highest average low temperature is August (65.7°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).
Average pressure in July
San Diego, CA
- Average pressure in July: 29.91"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in July
San Diego, CA
- Average wind speed in July: 5.6mph
The windiest months (with the highest average wind speed) are April and May (6.3mph).
The calmest month (with the lowest average wind speed) is October (5.2mph).
Average humidity in July
San Diego, CA
- Average humidity in July: 72%
The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (59%).
Average rainfall in July
San Diego, CA
- Average rainfall in July: 0.51"
The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in July
San Diego, CA
- Average rainfall days in July: 5.4 days
The month with the highest number of rainy days is March (7.6 days).
The month with the least rainy days is June (2.7 days).
Average sea temperature in July
San Diego, CA
- Average sea temperature in July: 67°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).
Average daylight in July /
Average sunshine in July
San Diego, CA
- Average daylight in July: 14h and 6min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in July: 11h and 54min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in July
San Diego, CA
- Average sunshine days in July: 20.3 days
The month with the most sunshine days is January (24.3 days).
The month with the least sunshine days is July (20.3 days).
Average UV index in July
San Diego, CA
- Average UV index in July: 6
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in July
San Diego, CA
- Average cloud cover in July: 11
The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).
Average visibility in July
San Diego, 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).
