The length of summer depends on how you define it:
Meteorological Summer
- 3 months long
- In the Northern Hemisphere: June 1 to August 31
- In the Southern Hemisphere: December 1 to February 28 (or 29)
Astronomical Summer
- Varies slightly each year based on the solstices
- Starts at the summer solstice (around June 20-22 in the Northern Hemisphere)
- Ends at the autumnal equinox (around September 22-23)
- Lasts about 3 months
So, summer typically lasts about 3 months either way! If you want to know the length of summer in a specific place or culture, let me know!