San Diego
California, USA
Long-term weather forecast
Long-term weather forecast

April 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
April, like March, in San Diego, California, is another enjoyable spring month, with average temperature ranging between max 66.2°F (19°C) and min 54.1°F (12.3°C).

Temperature

In April, the average high-temperature is almost the same as in March - a still enjoyable 66.2°F (19°C). In San Diego, in April, the average low-temperature is 54.1°F (12.3°C).

Humidity

The average relative humidity in San Diego is 69%.

Rainfall

In San Diego, during April, the rain falls for 6.2 days and regularly aggregates up to 0.67" (17mm) of precipitation. Throughout the year, in San Diego, there are 61.8 rainfall days, and 8.7" (221mm) of precipitation is accumulated.

Ocean temperature

In April, the average ocean temperature in San Diego is 60.6°F (15.9°C).
Note: For most, swimming in 60.6°F (15.9°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).

Daylight

In April, the average length of the day in San Diego is 13h.

Sunshine

In April, the average sunshine is 10.9h.

UV index

The average daily maximum UV index in San Diego, California, is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.

What is the temperature in April in San Diego?

The average high-temperature, in April, is 66.2°F (19°C), while the average low-temperature is 54.1°F (12.3°C).

What is the average humidity in April in San Diego?

In San Diego, California, the average relative humidity in April is 69%.

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

In San Diego, California, during April, the rain falls for 6.2 days and regularly aggregates up to 0.67" (17mm) of precipitation.

What is the ocean temperature in April in San Diego?

In San Diego, California, in April, the average water temperature is 60.6°F (15.9°C). Swimming in 60.6°F (15.9°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 April?

In April, the average length of the day in San Diego is 13h.

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

The average sunshine in April in San Diego is 10.9h.

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

In San Diego, the average daily maximum UV index in April is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in April - San Diego, CA
  • Average high temperature in April: 66.2°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 April: 54.1°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 humidity in April - San Diego, CA
  • Average humidity in April: 69%

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

Average rainfall in April - San Diego, CA
  • Average rainfall in April: 0.67"

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

Average rainfall days in April - San Diego, CA
  • Average rainfall days in April: 6.2 days

The month with the highest number of rainy days is March (7.6 days).
The month with the lowest number of rainy days is June (2.7 days).

Average sea temperature in April - San Diego, CA
  • Average sea temperature in April: 60.6°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 April / Average sunshine in April - San Diego, CA
  • Average daylight in April: 13h

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 April: 10.9h

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

Average UV index in April - San Diego, CA
  • Average UV index in April: 5

Months with the highest UV index are July, August and September (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 4).