Looks like June Gloom is settling in a bit early?
We were in San Diego in June, for a week, and took a day cruise to Ensenada Mexico. Once we were out of San Diego harbor, we didn't see the coast or the sun until we pulled in to Ensenada. Same thing on the way back. We were staying at the Hilton San Diego Resort (business meeting, didn't get to choose the venue) in the Mission Bay area and it was cold and drizzly all week. Walked a mile or so, to Old Town or over by the zoo and it was sunny and beautiful. All the fog was just along the coast. I have been to San Diego twice and it rained both times. So much for 'it never rains in Southern California'.
Our Mediterranean climate is 90% Ocean dominated which is a good thing and a bad thing. My meteorologist friends (and Monterey is home to hundreds of them with the Navy and with NOAA) tell me that the "marine layer," which looks like fog is merely a confluence of warm air over cold ocean water, and that it is always there--unless we have an offshore flow--again rare.
Thus the hotter it gets inland (King City in the Salinas Valley is 85 now) the more chance that the layer will build over land and we get June Gloom a lot. Today for example her on our perch at 750 feet above sea level, it did not clear until 11:30am and based on the winds I would assume it will be overcast again around 4 pm.