Summer's end depends on the definition and hemisphere:
- In the Northern Hemisphere, astronomically, summer ends at the autumnal equinox, which falls around September 22nd or 23rd. This marks the transition to fall or autumn.
- Meteorologically, summer is defined as the months of June, July, and August, so it ends on August 31st.
- In the Southern Hemisphere, summer ends around March 20th or 21st, at the autumnal equinox, and meteorological summer is December 1st to February 28th or 29th.
In summary:
- Astronomical summer ends ~September 22-23 in the Northern Hemisphere.
- Meteorological summer ends August 31st in the Northern Hemisphere.
- Southern Hemisphere summer ends around March 20-21 or February 28-29 (meteorologically).
