How to protect yourself from different UV rays?

The UV Index was developed by the U.S. National Weather Service and the U.S. Environmental Protection Agency to provide information that would be useful in planning activities and preventing the risk of overexposure to the sun.

The UV index is determined daily and predicts the intensity of UV radiation, which reaches the earth's surface, on a scale from 1 to 11+. 1 means low risk, and 11+ means extreme risk. In determining it, several factors are taken into account such as: degree of cloudiness, height of the sun, latitude, altitude, presence of ozone in the atmosphere, reflection from certain surfaces and other local conditions that affect the UV radiation that reaches the surface on Earth.

The UV index varies throughout the day. Thus, in the summer months, in the morning and in the evening, the risk of UV radiation is low, until 11 am and after 5 pm it is moderate, and it is highest in the afternoon.