seasonal
US /ˈsiː.zən.əl/
UK /ˈsiː.zən.əl/

1.
2.
季節性的, 隨季節變化的
dependent on or varying with the season of the year
:
•
Many businesses experience seasonal fluctuations in sales.
許多企業經歷季節性銷售波動。
•
The demand for ice cream is highly seasonal.
冰淇淋的需求具有很強的季節性。