Here's the truth. It was colder, more snow, and an ARCTIC wind on JFK's inauguration in 1961. I remember it. You might, too. It was the first inauguration broadcast live on network TV. They were all bundled up in great coats and scarves. That was the "ask not what your country can do for you" address.
What I hear is that there were indications that turnout on Monday was going to be less than "all time most spectacular in world history" ... you know, the "MILLIONS OF PATRIOTS" that love and adore Pres. Orange Stain. Not so much. So ... in the words of another stable genius, "strategery"; they moved it inside.
President Kennedy was not a coward. Like all bullies, rapists, and real estate cheats Pres. Stain is.