曇ってきた

has started to become cloudy

→ 曇る
phrase Rare #32,534
has started to become cloudy Describes the sky becoming cloudy, with 〜てきた emphasizing that the change has begun or is progressing toward the present.
JA: 午後になって、空が曇ってきた。
EN: As the afternoon went on, the sky started to become cloudy.

空が一面に曇ってきた

The sky has become completely overcast.

曇ってきたようだね

Looks like it’s getting cloudy.

空が急に曇ってきた

The sky suddenly clouded over.

メガネ曇ってきた

My glasses are starting to fog up.