The weather looks as gloomy as my mood. What rhetoric is used?

Metaphor. The weather looks as gloomy as my mood. I use figurative rhetoric, that is, I use more concrete and vivid things to describe the weather more vividly. For example, if you want to write about a rainstorm, you must first think about the characteristics of the pouring rain, whether it is loud and fast-paced, and fill it in.