If it is that your skin is light, if it is that your skin is dark, it really matters not. If it were bright and sunny outside, with scorching temperatures, or if it were that it had been cloudy, it really does not matter in the least bit.
Dermatologists recommend that we all use sunscreen and the reason is plain and obvious. Sun burn is devastating, but cancer is even worse.
Skin cancer and more can easily be attributed to one basking in the steaming hot sun of these global warming times in which we all dwell.
Link: Worst sunburns scorch and sizzle -- 5 ways to avoid get