August weather forecast
San Diego, CA

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

Weather in August

The last month of the summer, August, is another warm month in San Diego, California, with an average temperature fluctuating between 77.4°F (25.2°C) and 65.7°F (18.7°C).

Temperature

The warmest month is August, with an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 65.7°F (18.7°C).

Humidity

The average relative humidity in August in San Diego is 70%.

Rainfall

In San Diego, in August, during 3.8 rainfall days, 0.39" (10mm) of precipitation is typically accumulated. 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

With an average ocean temperature of 68°F (20°C), August is the month with the warmest seawater in San Diego.
Note: Swimming in 68°F (20°C) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 69.8°F (21°C).

Daylight

In August, the average length of the day in San Diego is 13h and 19min.
On the first day of the month, sunrise is at 6:02 am and sunset at 7:47 pm. On the last day of August, sunrise is at 6:22 am and sunset at 7:14 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, California, are July through September, 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 rays for average individuals.
Note: The average daily UV index of 6 in August transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
[Resources]

FAQ

What is the warmest month in San Diego?

With an average high-temperature of 77.4°F (25.2°C) and an average low-temperature of 65.7°F (18.7°C), August is the warmest month in San Diego, California.

What is the average humidity in August in San Diego?

In August, the average relative humidity in San Diego is 70%.

How much does it rain in San Diego in August?

In San Diego, California, in August, it is raining for 3.8 days, with typically 0.39" (10mm) of accumulated precipitation.

What month is the ocean warmest in San Diego?

With an average ocean temperature of 68°F (20°C), August is the month with the warmest seawater.

What is the ocean temperature in August in San Diego?

In San Diego, California, in August, the average water temperature is 68°F (20°C). For most, swimming in 68°F (20°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

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

The average day length in August in San Diego is 13h and 19min.

When are sunrise and sunset in August in San Diego?

On the first day of August, sunrise is at 6:02 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 6:22 am and sunset at 7:14 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 many hours of sunshine does San Diego have in August?

In August, the average sunshine duration is 11.9h.

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

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

How high is the UV index in August in San Diego?

In August, the average daily maximum UV index in San Diego, California, is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation.

Average temperature in August
San Diego, CA

Average temperature in August - San Diego, CA
  • Average high temperature in August: 77.4°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 August: 65.7°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).

[Resources]

Average pressure in August
San Diego, CA

Average pressure in August - San Diego, CA
  • Average pressure in August: 29.89"

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

[Resources]

Average wind speed in August
San Diego, CA

Average wind speed in August - San Diego, CA
  • Average wind speed in August: 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).

[Resources]

Average humidity in August
San Diego, CA

Average humidity in August - San Diego, CA
  • Average humidity in August: 70%

The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (59%).

[Resources]

Average rainfall in August
San Diego, CA

Average rainfall in August - San Diego, CA
  • Average rainfall in August: 0.39"

The wettest month (with the highest rainfall) is December (1.65").
The driest month (with the least rainfall) is June (0.12").

[Resources]

Average rainfall days in August
San Diego, CA

Average rainfall days in August - San Diego, CA
  • Average rainfall days in August: 3.8 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).

[Resources]

Average sea temperature in August
San Diego, CA

Average sea temperature in August - San Diego, CA
  • Average sea temperature in August: 67.9°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).

[Resources]

Average daylight in August /
Average sunshine in August
San Diego, CA

Average daylight in August / Average sunshine in August - San Diego, CA
  • Average daylight in August: 13h and 19min

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 August: 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).

[Resources]

Average sunshine days in August
San Diego, CA

Average sunshine days in August - San Diego, CA
  • Average sunshine days in August: 21.8 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).

[Resources]

Average UV index in August
San Diego, CA

Average UV index in August - San Diego, CA
  • Average UV index in August: 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).

[Resources]

Average cloud cover in August
San Diego, CA

Average cloud cover in August - San Diego, CA
  • Average cloud cover in August: 9

The month with the most cloud cover is December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 9).

[Resources]

Average visibility in August
San Diego, CA

Average visibility in August - San Diego, CA
  • Average visibility in August: 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).

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location