When I look for 100 at BOS there is a checklist:
 
	1.  90 by 9:   Fail today
 
	2.  Winds to the left of 240:  failing so far today
 
	3.  Dews below 70:  pass today
 
	I suspect BOS hits 96-98 which while really hot nothing out of the ordinary if this ends up the hottest day of the year..