A person who can tolerate one hour of sun in Florida without burning can tolerate two hours of sun in New Jersey under the same conditions. The greatest intensity of ultraviolet light occurs at the summer solstice, about June 22. May 1 has as much intensity as August 15. Clouds can cool and give a false impression that there is little risk of sunburn. Reflected light may burn areas which are usually shaded, such as those under the nose or chin.
Clothing is important.
Colored clothing and denser-woven clothing allow less light penetration. These allow protection with long sleeves in warm weather. With time this type of clothing may become less expensive and more common. Hats are essential. Hats with brims at least 3 inches wide all the way around are best for protecting the face, ears, and neck.