Summer is “over” on different dates depending on which definition you use and where you live.

The two main answers

  • Meteorological summer (used by weather services and climatologists)
    • Northern Hemisphere: June 1 to August 31 → summer ends August 31.
* Southern Hemisphere: December 1 to February 28 (or 29) → summer ends **Feb 28/29**.
  • Astronomical summer (based on the Sun, solstices and equinoxes)
    • Northern Hemisphere: from the summer solstice (around June 20–21) to the autumn equinox (around September 22–23) → summer ends around Sept 22–23.
* Southern Hemisphere: from around December 21 to around March 20 → summer ends **around March 20**.

So if you’re asking “when is summer over?” in the everyday, weather sense in much of Europe or North America, most official calendars treat it as over on August 31.

How people talk about it online

In forum discussions people often say summer feels over:

  • when school starts again,
  • right after Labor Day (in the US), or
  • when evenings get noticeably cooler and days shorter.

You’ll also see culture and lifestyle pieces joking that “summer is over” once vacations end, fall sports and TV return, and social media shifts from beaches to autumn leaves.

Information gathered from public forums or data available on the internet and portrayed here.