秋天是冷还是热呢用英文怎么说

秋天是凉爽的。它的温度通常在晚上有些寒冷，白天则比较温暖。

"Autumn is cool." Its temperature is usually cold in the evenings and warm during the day.

例句：

The autumn air is crisp and refreshing.（秋天的空气清新凉爽。）
I love the cool autumn weather.（我喜欢凉爽的秋天天气。）