We have had low seventies for highs at times and I still have to scrape ice before dawn when I head out for work often.
Not that unusual, historically, but we have a run of very early springs in the past ten years, even after some record breaking harsh winters.
I still wear a jacket when I go out. I still have loads of survival gear against cold in my car, just in case.
It is not "summer" yet!
OH! This past winter was record breakingly mild. BUt it is still very cool at night, quite often.