It was not 87, that is simply a untrue. The high at JFK today did not reach 85 until the warmest part of the day. It was slightly cooler in lower Manhattan all day.
7:51 AM 77.0 °F - 71.1 °F 82% 29.90 in 10.0 mi SSW 12.7 mph - N/A Mostly Cloudy
8:51 AM 80.1 °F 84.2 °F 73.0 °F 79% 29.91 in 10.0 mi WSW 13.8 mph - N/A Mostly Cloudy
Best estimate is that it was about 76 or 77 degrees when the ceremony began at 8:40 AM, and about 77 or 78 when she left.
I must have misread something. My bad.
Admit I am acclimated to warmer temps than north-easterners, but those temps are cool to comfortable, especially to someone not doing anything physical.