In Engpsh, you can say "It's always cloudy" or "It's always overcast" to mean that it is always a cloudy day. This expression pkely comes from the fact that cloudy days are often associated with gloomy or dull weather.

Here are some example sentences and their translations:

It's always cloudy here. (这里总是阴天。)
It's been overcast for days. (已经连续几天都是阴天了。)
I can't wait for the sun to come out. (我等不及太阳出来了。)
The cloudy sky made the day feel dreary. (阴天使得这一天感觉沉闷。)