noun
overcast weather; cloudy sky threatening rain
Describes a sky that is heavily overcast, often with the implication that rain is imminent or likely. Used as a noun.
朝から雨曇りで、今にも降り出しそうだ。
It's been overcast since morning, and it looks like it could start raining any minute.
雨曇りの空を見上げて、傘を持っていくか迷った。
Looking up at the overcast sky, I wondered whether to take an umbrella.
Compound of 雨 (あま, 'rain') and 曇り (くもり, 'cloudiness'). The reading あま is a common combining form of 雨.