Summer Definition & Meaning - Merriam-Webster

in the summer  Rochester, NY is filled with fun activities that will have you out exploring this summer Check out this list of 30 things to do and to add Calvin Harris - Summer

The phrase 'in the summer' is correct and commonly used in English, while the phrase 'at the summer' is incorrect 'In the summer' is the ฟัง IN THE SUMMER - Single จาก ARASHI ใน Apple Music พ ศ 2563 1 เพลง ระยะเวลา: 4 นาที

Both are correct forms when we talk about seasons of the year from what I learnt But is there any difference between in summer and in the Wall Street typically has a more muted performance during the summer months