"天气阴沉沉" 的英文表达可以是 "gloomy weather" 或 "overcast weather."

"Gloomy" 源于古英语 "glōm"，意思是阴暗、黑暗或沮丧。"Overcast" 源于中世纪拉丁语 "obscurus"，意思是遮盖、覆盖或笼罩。

以下是一些英文例句，其中文翻译在括号内：

It looks pke it's going to be a gloomy day today. (今天看起来会是一个阴暗的天气。)
The sky is overcast and there's a chance of rain. (天空阴沉沉，有可能会下雨。)
I hate it when it's gloomy outside. It always makes me feel down. (我讨厌外面天气阴沉沉的时候。总是让我感觉沮丧。)
It's been overcast for days and I'm getting sick of it. (已经连续几天都是阴天了，我开始厌倦了。)