add further nuance. In many countries, especially those with temperate climates, summer is often associated with school holidays, festivals, and outdoor activities. For example, in the United States and much of Europe, the "summer break" for schools typically spans from late May or early June until late August or early September, effectively treating June, July, and August as the summer months. Conversely, in Australia and New Zealand, summer is culturally tied to Christmas and New Year’s, with December, January, and February being the season for beach trips and barbecues. Some cultures, such as in traditional Chinese calendars, define summer as roughly from May to July, based on solar terms rather than solstices.
The answer depends entirely on where you are in the world. Because the Earth is tilted on its axis, the seasons are reversed in the Northern and Southern Hemispheres.
The definition of summer is more than just "hot weather." Depending on where you live or whether you are talking to a meteorologist or an astronomer, the answer to "which months are in summer" changes significantly. 1. Astronomical Summer (The Solstice Basis)