Keeping perfume away from direct sunlight in hot weather is crucial because heat and UV light can degrade fragrance molecules, reduce shelf life, and alter the scent quality. Exposure to high temperatures accelerates evaporation and chemical breakdown, leading to diminished fragrance integrity.
Exposure to direct sunlight and high temperatures can significantly damage perfumes by affecting their chemical composition. According to Perfume Direct, heat and humidity can alter the quality of fragrances, leading to a loss of scent fidelity and shelf life deterioration [1]. Quora sources emphasize that sunlight, especially UV rays, can break down aromatic molecules, particularly those with double bonds, causing the fragrance to change or spoil [2][4]. Additionally, high heat causes evaporation of volatile components, which can diminish the perfume's potency and alter its intended scent profile [2]. It is recommended to store perfumes in cool, dark places—similar to how wine is stored—to preserve their integrity over time [3]. Therefore, keeping perfume away from direct sunlight in hot weather helps maintain its chemical stability, scent quality, and longevity.