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. If you want to know why pigmentation increases in summer, the biggest reason is strong ultraviolet rays from sunlight. During summer, the https://medium.com/@drnikitapatel2025/why-does-skin-pigmentation-increase-in-summer-62ea6eb7f9d0