I think part of that is the expansion of the UHI, but part of it is that our summer nights are becoming more humid. To our south, overnight lows in the 70s are routine even in rural areas bc the dewpoint stays above 70.
it's nice that the Metro stations all have A/C so you don't come close to death waiting on the platform, but man tonight you feel it stepping out onto the street. In NY even on the hottest nights there was a slight relief walking out of a subway station because the station temps would be well over 100F.
DC at 87F at 10pm looks to be the hottest temp on the east coast right now (I'm not counting Key West (88F) because they are surrounded by hot tub water rn)
megalopolis starting to flex the overnight lows:
73F at DCA
76F at NYC
79F at LGA
72F at BOS
The ease with which LGA records lows 78-80F these days is disturbing.
literally the storms hit Western Ave and split or disappear or go some other direction. It's like we live on the one big hill in DC and they are like, "nope".