June weather forecast and climate
San Diego, CA

The view of Coronado Island in San Diego, California, from across a water body on a sidewalk, with a row of palm trees
The view of Coronado Island in San Diego, California, from across a water body on a sidewalk, with a row of palm trees
June is the beginning of the San Diego summer, which brings pleasant temperatures in the 62°F (16.7°C) to 71°F (21.7°C) average range. It is a rare day that touches the 80°F (26.7°C) mark or drops down significantly below 60°F (15.6°C).
Mornings are foggy with the June Gloom effect due to which the sun hides in the misty conditions until the afternoon. San Diego attracts summer crowds due to the mild temperatures in the absence of rain, and the various attractions of the historical city. Expect sunshine for a daily 8 hours during the long daylight hours. Evenings are pleasant with a light breeze in the coastal areas.

What is the temperature in June in San Diego?

In San Diego, in June, the average high-temperature is 70.9°F (21.6°C), and the average low-temperature is 62.1°F (16.7°C).

What is the average humidity in June in San Diego?

In San Diego, California, the average relative humidity in June is 74%.

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

In June, in San Diego, the rain falls for 0.8 days. Throughout June, 0.1" (2mm) of precipitation is accumulated.

How cold is the water in June in San Diego?

In San Diego, California, in June, the average water temperature is 64.8°F (18.2°C). For most, swimming in 64.8°F (18.2°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).

When are the longest days in San Diego?

June has the longest days of the year in San Diego, with an average of 14.3h of daylight.

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

The average length of the day in June in San Diego, California, is 14.3h.

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

The average sunshine in June is 8.1h.

When is the highest UV index in San Diego?

Months with the highest UV index are June through August, with an average UV index of 10.

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

In San Diego, the average UV index in June is 10.
Average temperature in June - San Diego, CA
  • Average high temperature in June: 70.8°F

The warmest month (with the highest average high temperature) is August (76.4°F).
The month with the lowest average high temperature is December (64.7°F).

  • Average low temperature in June: 62°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is December (48.4°F).

Average humidity in June - San Diego, CA
  • Average humidity in June: 74%

The month with the highest relative humidity is July (74.6%).
The month with the lowest relative humidity is January (63.1%).

Average rainfall in June - San Diego, CA
  • Average rainfall in June: 0.1"

The wettest month (with the highest rainfall) is January (2.1").
The driest month (with the lowest rainfall) is July (0").

Average rainfall days in June - San Diego, CA
  • Average rainfall days in June: 0.8 days

The month with the highest number of rainy days is February (7.1 days).
The month with the lowest number of rainy days is August (0.4 days).

Average sea temperature in June - San Diego, CA
  • Average sea temperature in June: 64.7°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 June / Average sunshine in June - San Diego, CA
  • Average daylight in June: 14.3h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).

  • Average sunshine in June: 8.1h

The month with most sunshine is July (Average sunshine: 9.8h).
The month with least sunshine is December (Average sunshine: 7.5h).

Average UV index in June - San Diego, CA
  • Average UV index in June: 10

Months with the highest UV index are June, July and August (UV index 10).
Months with the lowest UV index are January and December (UV index 3).

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