When Does Summer End In America [upd] May 2026

So, for most people thinking about pool closings and back-to-school, summer “feels” like it ends in late August. But for stargazers and calendar purists, summer officially bows out in late September.

Summer is defined as the three warmest months of the year: June, July, and August . By this definition, summer ends on August 31 . when does summer end in america

In the United States, the answer depends on whether you’re following the astronomical calendar or the meteorological calendar. So, for most people thinking about pool closings

Summer ends on the autumnal equinox , which typically falls on September 22 or 23 . In 2024, summer ends on September 22 . After this date, daylight becomes shorter than darkness in the Northern Hemisphere. and August . By this definition