The definition of "summer" varies significantly depending on the geographic hemisphere and the system of measurement used (meteorological vs. astronomical). Generally, summer is the warmest season of the year, occurring between spring and autumn. In the Northern Hemisphere, summer typically spans June through August, while in the Southern Hemisphere, it spans December through February.
Summer takes place during December, January, and February . This applies to regions like Australia, New Zealand, South Africa, and most of South America. Meteorological vs. Astronomical Summer