103 F on 8/21/07 -- A new record for me, not that I'm particularly proud of it.
102 F on 8/8/02 -- Previous record, after which I swore to myself I wouldn't bike commute if it was supposed to top 100.
These temperatures won't look impressive to those living in the Southwest US, but the humidity in the Southeast really makes anything over 100 brutal. There is a difference between dry heat and humid heat. For the record, the all-time highest temperature in my city (Raleigh, NC) is 105.