FDK hit 99 so you're not off. On days like this valleys can just torch. Its why places like Hagerstown and Cumberland can get so warm early in the season.
If we can manage a westerly wind at DCA all day they should hit 100. 925 temps are +25 and the convective temp is 96 so there seems to be a bit more of a lid of things.
Yea the weird thing about DCA is that if it switches west then it can spike like 5 degrees in minutes. Its such a terrible site for official obs though. Wish it was somewhere on the mall.