Question: are the museums in dc open on the 4th of july?
Answer: Smithsonian Institution Releases July 4th Hours. ... 10 a.m.- 5:30 p.m. – All other Smithsonian museums, except for Air & Space and Natural History. 10 a.m.- 8:30 p.m. – Air & Space Museum, Natural History Museum. In addition to varied museum hours over the holiday, several streets will be closed for the day.