The highest temperature I can confirm is 120°F, in Fresno when I was a kid. I was visiting my grandparents and my grandmother kept bitching because all we wanted to do was stay inside.
The lowest I can confirm is while living in Boston. One night, I'm walking my girlfriend home and it's snowballs cold; like, Jack London weather. I get home later and this guy who lives downstairs from me comes out of his room and he's all excited: "Do you know how cold it is outside!!??" "Pretty fucking cold," I say. He then goes on to tell me that, with the wind chill factor, it was around -60°F. That's verging on pissing ice cold.
The Rev