UV Index and Sun Protection Guide

What the UV Index tells you

The UV Index measures the level of ultraviolet radiation expected at a place and time. It starts at zero and has no fixed upper limit. A higher value means greater potential for skin and eye damage and less time before harm can occur. It is a planning signal, not a countdown that guarantees a safe number of minutes in the sun.

WHO recommends sun protection when the UV Index is 3 or above. Clouds, cool air, and wind do not make UV harmless. Reflection from water, sand, concrete, and snow can add exposure, so temperature alone is a poor guide to sun risk.

Turn the number into a decision

• 0-2, low: risk is usually limited for most people, but glare and long exposure can still matter.
• 3-5, moderate: add shade, covering clothing, sunglasses, and sunscreen for exposed skin.
• 6-7, high: shorten exposed midday activities and make protection routine rather than optional.
• 8-10, very high: move flexible plans away from the strongest sun and use several protection methods together.
• 11+, extreme: minimize direct midday exposure and take full protection measures.

A practical outdoor plan

Check the peak UV forecast, not only the current reading. For a long walk, event, beach visit, or outdoor job, identify shade before leaving and bring protection you can keep using. Sunscreen complements shade and clothing; it should not be used to extend time in strong sun. Follow the product label for application and reapplication, especially after swimming or sweating.

Who should use extra care

Children, people with a history of skin cancer, and anyone taking medicine that increases sun sensitivity may need individualized advice. Skin tone changes sunburn risk but does not remove the possibility of UV-related eye or skin damage. Ask a clinician or pharmacist about personal risk and medication warnings.

Limits of this page

The local card uses forecast-provider data and may differ from an official national service or conditions at a reflective surface or high elevation. Recheck close to departure and follow local health or weather alerts when they conflict with a general forecast.