July weather forecast
San Diego, CA

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

Weather in July

July in San Diego, California, is a moderately hot summer month, with an average temperature fluctuating between 75.4°F (24.1°C) and 64.2°F (17.9°C).

Temperature

In July, the average high-temperature is essentially the same as in June - a moderately hot 75.4°F (24.1°C). In July, the average low-temperature is 64.2°F (17.9°C).

Humidity

In July, the average relative humidity is 72%.

Rainfall

In San Diego, it is raining for 5.4 days, with typically 0.51" (13mm) of accumulated precipitation. Throughout the year, there are 61.8 rainfall days, and 8.7" (221mm) of precipitation is accumulated.

Ocean temperature

In San Diego, the average seawater temperature in July is 67.1°F (19.5°C).
Note: For swimming, a surface water temperature of 67.1°F (19.5°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

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, sunrise is at 6:02 am and sunset at 7:47 pm PDT.

Sunshine

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

UV index

The months with the highest UV index in San Diego are July through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for the average person.
Note: In July, the average maximum UV index of 6 translate into the following recommendations:
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 the 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 average humidity in July in San Diego?

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

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

In San Diego, in July, it is raining for 5.4 days, with typically 0.51" (13mm) of accumulated precipitation.

How cold is the water in July in San Diego?

In July, the average ocean temperature in San Diego, California, 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).

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

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

When is the sunrise / 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, California, 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 are July and August, with an average of 11.9h of sunshine.

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

The average sunshine duration in July in San Diego is 11.9h.

What is the month 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?

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

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).

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Average pressure in July
San Diego, CA

Average pressure in July - San Diego, CA
  • Average pressure in July: 29.91"

The month with the highest atmospheric pressure is January (30.09").
The months with the lowest atmospheric pressure are June and September (29.88").

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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).

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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%).

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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").

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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).

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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).

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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 4min

The month with the longest days is June (Average daylight: 14h and 16min).
The month with the shortest days is December (Average daylight: 10h and 2min).

  • Average sunshine in July: 11.9h

The months with the most sunshine are July and August (Average sunshine: 11.9h).
The month with the least sunshine is December (Average sunshine: 6.7h).

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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).

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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).

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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).

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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).

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