warmest of the four temperate seasons, beginning or centered around the summer solstice

Summer is one of the four seasons. It is the hottest season of the year. In some places, summer is the wettest season (with the most rain), and in other places, it is a dry season. Four seasons are found in areas which are not too hot or too cold. Summer happens to the north and south sides of the Earth at opposite times of the year. In the north part of the world, summer takes place between the months of June and September, and in the south part of the world, it takes place between December and March. This is because when the north part of the Earth points towards the Sun, the south part points away.

Beaches are associated with summer in Western culture.
Green fruit trees are also typical for summer season

Many people in rich countries travel in summer, to seaside resorts, beaches, camps or picnics. In some countries, they celebrate things in the summer as well as enjoying cool drinks. Other countries get snow in the summer just like winter.

Spring     Winter
   Summer           Autumn