Originally filming on location in Garrison, NY was scheduled for about 4-5 weeks. Once production started on the film, producers realized that June is a rainy month in that part of The Hudson Valley. Director Gene Kelly was able to change the filming schedule to just under 2 weeks.
Filming commenced April 15, 1968 and was concluded 90 days later, one day over schedule. Although 65 percent of the movie was shot outdoors, only one full day was lost to the weather—and that in Garrison, New York, when it rained.
They only lost 1 full day to rain – not an entire week. Gene was able to film everything on location in 11 days. Again, he gets so many facts in the book wrong. Not sure why he would rather believe lies than the truth. Even back then, people believed "fake news."
The main reason why HD cost so much money was due to the show's Broadway producer, David Merrick. There was a stipulation in his contract with 20th Century Fox that the film couldn't be released for several years, and after ticket sales had naturally gone down. That never happened with HD as David cast big stars after Carol left, and the box office was going strong. Filming ended in Sept 1968, and the film sat on a shelf and wasn't released until Dec 1969. 20th Century Fox had to pay even many more millions to David to get the film released.
Updated On: 6/10/18 at 07:25 PM