don-yori
A heavy, gray sky with thick clouds blocking all sunlight, creating a dreary, oppressive atmosphere. Can be extended metaphorically to describe a gloomy mood, but primarily refers to overcast weather.
💡A depressing November sky — 'The sky was don-yori all week.'
朝からどんよりした空が広がっている。
The don-yori overcast sky has been spread since morning.
The ___ sky matched my mood perfectly that day.
○○とした空がその日の気分にぴったりだった。