In the northern hemisphere, the summer months are considered June, July and August; however, in the southern hemisphere, the summer months are December, January and February. In the northern hemisphere, the summer season runs from June 20th or 21st through September 21st or 22nd each year.
June, July and August are considered the summer months by meteorologists and typical Americans because these three months feature the warmest and longest days of the year. In warmer climates in the United States, families spend a lot of time in the summer at the pools and playing baseball. Children on a nine-month academic calendar usually have July and most of June and August off from school.