alt Hacker News+1. Also, just to call out, it doesn't need to be _warm_ for you to need sunblock. Even when it's cooler / cloudier out there you can still get skin damage. Look for UV rating rather than temperature. Conversely, it being hot doesn't imply high-UV either.
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I didn't know about the UV index or what it meant until like three years ago. It blows my mind I went that long without understanding. It was actually wonderful to learn that I could just see if I needed sunblock based on a 0-10 scale.
We never wore sunscreen as kids because we didn't burn. I probably have had three sunburns in my life. Learned once I became an adult that that wasn't sound logic...
I’ve always wondered about this. I have fair skin, and I tend to burn somewhat easily in very sunny environments like the beach.
However, I’ve never gotten so much as a whisper of sunburn / suntan / anything on an actually cloudy day where sun wasn’t hitting me directly. Is the damage a different type that’s imperceptible? Or is this a public health comms strategy where they assume people will see a single cloud in the sky and decide it’s fine to skip sunscreen, so they talk about how you should slather yourself with sunscreen 24/7, even if the sun is obscured?
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This was my experience. Years ago I travelled to New Zealand in what would be their spring time. We stayed in Wanaka but also travelled around Twizel, Tekapo etc.
Although it was pretty sunny with clear blue skies, the air temperature was fairly chilly (shirt, jumper and fleece cold - and I'm Scottish so used to cold weather) and I started to burn. I was warned about this, and the probability of high UV exposure at altitude by the locals and family, and was advised to apply a high factor sunblock whilst roaming around the higher elevations of New Zealand's South Island, which I did.