The UV Index chart tells you how quickly you will burn your skin without protection so that you can apply sunscreen as often as needed.
The U.S. National Weather Service measures ultraviolet levels on a daily basis, and uses these numbers for various exposure levels.
You can find out what the UV Index forecast is where you live by visiting this page  and entering your zip code.
"Time to Burn" and "Actions to Take" apply to people with fair skin that sometimes tans but usually burns. People with lighter skin need to be more cautious. People with darker skin may be able to tolerate more exposure.
Sun safety is all about prevention. If your fun in the Sun does result in sunburn, we hope that these 20 home remedies for sunburn  will help provide relief.