In San Diego, California, during April, the rain falls for 4 days and regularly aggregates up to 0.9″ (23mm) of precipitation.Click to see full answer. Herein, is April a good time to go to San Diego?The best times to visit San Diego are the months of March, April, September, and October, as they are generally warm and less crowded than summer. Tourist season is at its peak in June, July, and August, but you’ll also find cloudy skies at the beach for much of early summer (known locally as June gloom).Secondly, how warm is it in San Diego in April? In most years, San Diego averages a daily maximum temperature for April that’s between 65 and 70 degrees Fahrenheit (19 to 21 degrees Celsius). The minimum temperature usually falls between 54 and 58 °F (12 to 14 °C). The days at San Diego warm slightly during April. Also know, what is the rainiest month in San Diego? January Does it rain in April in California?In Los Angeles, California, in April, it is raining for 3.2 days, with typically 1.1″ (29mm) of accumulated precipitation.