"Summer is hot" 在英语中可以表达为 "Summer is hot." 或 "It's hot in summer."。
来源：这是一个非常基础的表达，它来源于夏天是炎热的这一事实。
例句：
Summer is hot, so make sure to drink plenty of water. (夏天很热，所以一定要喝很多水。)
The sun is scorching hot in the summer. (夏天的阳光非常灼热。)
I can't stand the heat in summer. (我受不了夏天的热。)