Can I get sunburn on a cloudy day?

You can suffer sun damage even on a cloudy day. Believe it or not, up to 80 per cent of the sun’s UV rays can penetrate through clouds and fog, so even though you might feel more protected because you can’t feel the heat of the sun (or see your shadow!) you still need to practice sun safety and wear sun screen.

Can I use a lower SPF on cloudy days?

You should still use a broad-spectrum sunscreen on cloudy days. In fact, some research has shown that particular types of clouds can increase the focus of UV light, raising the risk factor.