Because you're an inanimate object (sky) actions...its angry and its looming...so you're are giving it abilities a person for instance can do!
The dark sky was angry and resentful.
No, a personification is when you give an inanimate object human qualities.
The sky roared with anger!
metaphor
This sentence contains examples of personification and simile. Personification is used when the winds and clouds are described as having human-like qualities (winds were up, clouds raced out to sea). Simile is used when the clouds are compared to a stampede of angry sky spirits.
The sky can appear dark or greenish when a tornado is looming overhead.
Yes, "under the jewelled sky" is an example of personification because the sky, an inanimate object, is described as having the qualities of a jewel, which is typically associated with beauty and value. This personification adds an element of vivid imagery and enhances the poetic quality of the description.
Uranus (Ouranos meaning "sky" or "heaven") was the personification and god of the heavens/sky.
personification
In the darkness the moon smiled in the sacred sky
Caelus, the personification of the sky.
overhead