Once summer is over, mid-January, as I say, it gets colder, rain can happen, and overcast is frequent.
From Jeremiah Johnson:
Would you happen to know what month of the year it is?
No, l truly wouldn't. l'm sorry, pilgrim. March. Maybe, April. March maybe. l don't believe April. Winter's a long time going? Stays long this high. March is a green, muddy month down below. Some folks like it. Farmers mostly.March is wet, April's a nice month. Things green up. For a few weeks, the weather is brilliant. By early June the heat has returned, the hills are browning. Then the marine layer moves in along the coast and lays down like a wet dog for a while. Two months, three this year, I hear. Can't see the sun, ever.
After that, the heat begins again broken only by the furnace-like Santa Ana winds.
I am reminded of how summer felt in SoCal by what I consider to be the best line of the day:
Fall is my favorite time of the year if only because it frees me from this oppressive heat which makes me feel like death and smell like old balls.(http://jezebel.com/5631170/what-should-fellas-wear-in-autumn-to-make-us-not-look-idiotic)