Summer vacation can last from six to 14 weeks, or 42 to 98 days, and varies widely depending on the school district. The average length of the instructional school year is 180.4 days, according to the National Center for Education Statistics.
Summer vacation times can vary based on the area of the U.S. where the school is located. Most schools in the northern states observe summer vacation beginning in early June and running through early September, while southern states generally dismiss classes in late May and then resume classes in late August. Nearly all schools give students a partial week off in November in observation of Thanksgiving and then a week or even two weeks during December for Christmas. Fall and spring breaks are also generally observed.