summer · noun C or U /ˈsʌm.ər/
summer
A1 the season of the year between spring and fall, when the weather is warmest
Dictionary examples:
We usually go away in (the) summer.
We always spend our summers on the island.
I love these warm summer nights.
It was a perfect summer's day.
Learner example:
I like going to [the] park in the summer. (Skills for Life (Entry 1); A1; French)