President Ronald Reagan's inauguration in 1985.
President John F. Kennedy's inauguration in 1961 had similar temperatures — a high of 26 and a low of 19. It was held outside, even after a storm dumped 8 inches of snow the previous day.
"The weather forecast for Washington, D.C., with the windchill factor, could take temperatures into severe record lows," Trump posted on Truth Social, addressing the expected cold.
Reagan, left, beside his wife, Nancy Reagan, is sworn in as the 40th President of the United States by Chief Justice Warren Burger during the inaugural ceremony in the Capitol Rotunda in Washington, D.C., on Jan. 21, 1985.
"There is an Arctic blast sweeping the Country. I don’t want to see people hurt, or injured, in any way. It is dangerous conditions for the tens of thousands of Law Enforcement, First Responders, Police K9s and even horses, and hundreds of thousands of supporters that will be outside for many hours on the 20th (In any event, if you decide to come, dress warmly!)."
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Trump said D.C.'s Capital One Arena will be open Monday for live viewing of his inauguration "and to host the Presidential Parade."
"I will join the crowd at Capital One, after my Swearing in," he wrote.
https://www.foxnews.com/politics/trump-inaugurated-inside-last-ceremony-held-indoors-reagans-1985