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UV in Your Area

UV in Your Area

Ultraviolet (UV) radiation can penetrate the Earth’s atmosphere at any time and place, but certain regions have heightened radiation levels. UV rays are particularly strong near the equator, since they travel a shorter distance to reach the Earth’s surface. Cities at high altitudes also share higher UV levels because the sun’s rays can easily penetrate the thin atmosphere.

To view a series of maps that show monthly average UV Index values for the United States, click here.