This has been the 3rd wettest rain year on record in San Diego, 21.84 inches so far. #2 was 1940 (24.74 inches) and #1 was 1883 (25.97 inches). If we get just 4-1/4 more inches of rain before June 30th, we'll break the record. This year was also the first year since record keeping began in 1850 that 4 or more inches of rain fell in 4 separate months. (The previous record was 3 separate months in 1940)
This was an El Niño year, but it was a fairly weak one, with a maximum average ocean temperature of only 0.9C above normal (in contrast, 1982 was 2.3C above normal, temperature anomalies above 0.5C for 5 consecutive measuring periods are necessary to declare an El Niño). So if it's not the El Niño, what's causing all this crazy weather?