July weather forecast
San Diego, CA

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Coronado Island in San Diego, California, USA,
Coronado Island in San Diego, California, USA,

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.

Frequently asked questions

What is the average July temperature in San Diego?

The average high-temperature and low-temperature in San Diego during July are 75.4°F (24.1°C) and 64.2°F (17.9°C) respectively.

What is the average humidity in July in San Diego?

In San Diego, the average relative humidity in July is 72%.

How many days does it rain in July in San Diego?

In July, in San Diego, the rain falls for 5.4 days. Throughout July, 0.51" (13mm) of precipitation is accumulated.

What is the ocean temperature in July in San Diego?

In July, the average ocean temperature is 67.1°F (19.5°C). Swimming in 67.1°F (19.5°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

How many hours of daylight does San Diego have in July?

In San Diego, California, the average day length in July is 14h and 4min.

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

In July, on the first day of the month, sunrise is at 5:44 am and sunset at 8:00 pm. On the last day of the month, in San Diego, sunrise is at 6:02 am and sunset at 7:47 pm PDT.

What are the months with the most sunshine in San Diego?

The months with the most sunshine in San Diego are July and August, with an average of 11.9h of sunshine.

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

In July, the average sunshine duration in San Diego is 11.9h.

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

The months with the highest UV index are July through September, with an average maximum UV index of 6.

What is the UV index intensity in July in San Diego?

The average daily maximum UV index in July in San Diego is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from exposure to Sun's UV rays.
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 Diego, CA

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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in July - San Diego, CA
  • Average daylight in July: 14h and 1min

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 5min

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 - 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 - 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 - 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 - 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).

San Diego, California, USA

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