When does summer end in california?

Mar 11, 2018 - Daylight Saving Time Started. When local standard time was about to reach Sunday, March 11, 2018, 2:00:00 am clocks were turned forward 1 hour to Sunday, March 11, 2018, 3:00:00 am local daylight time instead. Sunrise and sunset were about 1 hour later on Mar 11, 2018 than the day before. There was more light in the evening. read more

Summer starts on June 21 and ends on Sept 20 - just like the other 49 states. However, it can remain quite warm into October, even though it's Fall at that point. read more

The summer solstice which marks the first day of summer occurs on June 21. The first day of Fall is September 22. Hope this helps. read more