Why Is Skin Pigmentation More Common In Hot Weather? Summer is the season when many people notice dark patches, tanning, uneven skin tone, and dullness on their skin. The primary reason behind increased pigmentation during summer is excessive exposure to harmful sun rays. During summer, the skin produces more melanin https://medium.com/@rameshjain5454/why-does-skin-pigmentation-increase-in-summer-599cc6b6d7c5