Just above 40 degrees, clear and sunny when I left Santa Cruz on Saturday morning at 10:30 am to drive over to the Santa Clara Valley for lunch. Awesome drive!
I've driven my car when it was in the low 30's in Santa Cruz (no idea what the temperature was when I hit the summit in the Santa Cruz mountains)...I'll need better gloves if I do that again.
Like others, if it's clear I'm usually up for drive.
