Thank you for bringing up the entire thread, i see the disconnect.
I was responding specifically to La weather, I've been to LA every single year for the last 10 years ( other then 1), and always had a pleasant experience. Looking at last years LA weather most of the month ranged from mid 60s to high 70s .
I will concede it gets chilly at night.
It is a great time to visit Southern California and Death valley NP .
TETO
1) weather information provided is for lax. Zion, Bryce, Yosemite and Northern CA are not that warm.
2) lax is not dependably in the pleasant 60s. Low 60s, high 50s, and a twenty degree drop at night or near the ocean is definitely a distinct possibility. Had to break out a sweater last night and everything.