Cats love to bask in the sun and it is possible for them to get sunburned. It is most common in cats with thin hair coats or in areas where the hair is sparse such on the tips on the ears, between the corner of the eye and the ear, and nose. It is also more common in white or light colored cats.
To prevent sunburn, minimize your cat's exposure to the direct sun during the hottest hours of the day. Sunscreen can be used on cats, however they generally dislike it. If they groom it off, many cats will drool or hypersalivate.