what time do the museums open in washington dc
The Washington Monument is open daily: 1  Regular Hours: 9:00 a.m. to 5:00 p.m. Last tour begins by 4:00 p.m. 2  Summer Hours: (Memorial Day to Labor Day) 9:00 a.m. to 10:00 p.m. Last tour begins by 9:00 p.m.