Why do literary works describing rainy days always express sadness and other negative emotions?

There is a term in Jungian psychology called "archetype", which refers to images that repeatedly appear in myths, religions, dreams, fantasies, and literature. This image originates from national memory and primitive experience. the collective subconscious. The “archetype” in literary theory draws on this setting. As a weather phenomenon, the color of "rainy day" is often gray, dark gray or even black. In primitive experience, it often corresponds to scenes such as death, dryness, ashes, etc. that are not conducive to survival; its touch is often wet, cold and sticky. , corresponds to mildew, freeze, rot and other situations that are not conducive to survival; its dim light corresponds to dangerous scenes... Primitive experience believes that sad and dangerous events are more likely to occur on rainy days, so rainy days are regarded as a kind of literature Archetype, prone to various negative emotions.

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