North America has made incredible strides in cleaner air thanks to legislative action that some would trash today. The air quality in many other parts of the world is horrendous.
i think during one of the mega heat waves in the early 2010s, EWR was like a high of 108 and low of 86 or something - like come on. NYC was 104/84 that day, but still.
there is a lot of huffing and puffing about the location of official sites that I think is way overblown (like KNYC is in the middle of a park, yet people still complain it is not representative of NYC). However EWR is ridiculous.
DCA should hit 90 at noon or close to it. Prob looking at 95-97 today I would think unless we get clouds or a more dominant south wind. Although the Potomac is heating up - water temp in the Washington Channel (closest buoy to DCA) is 83F.