Global live ultraviolet index: uv index right now, hourly curve, and a 15-day forecast, turned into one clear answer about how long you can safely be outside.
What you get
Six tools in one, built for anyone who spends time outdoors.
Get the latest UV index and ultraviolet radiation levels for any location worldwide, with regularly updated data to help you stay safe in the sun.
Track UV index levels throughout the day and plan outdoor activities when ultraviolet radiation is lower.
Get 7-day UV index forecast with daily peak values and plan your outdoor activities with confidence.
Estimate sunburn time by Fitzpatrick skin type and UV index, with personalized exposure estimates with or without sunscreen.
A personalized sun safety checklist based on the current UV index. Check sunscreen, a hat, sunglasses, and shade before heading outside.
Show today’s UV index alongside temperature, humidity, wind, cloud cover, sunrise, and sunset for a complete picture of sun conditions.
The scale
Why it matters
The sun’s UV strength isn’t determined by how warm or bright the day feels. Checking the UV index before heading outdoors helps you understand your sunburn risk and take the right precautions for safer time outside.
A cool, clear spring day can still have high UV levels and cause sunburn. Temperature does not indicate how strong ultraviolet radiation is or how quickly your skin can burn. Always check the UV index rather than relying on how warm it feels.
Overcast skies can feel safe, but clouds may still allow a significant amount of ultraviolet (UV) radiation to reach your skin. Thin clouds and bright haze can even scatter UV radiation, increasing sun exposure when you least expect it. Check the UV index even on cloudy days to reduce your risk of sunburn.
UV radiation can change significantly with latitude, altitude, time of day, and your surroundings. Snow, water, and sand can reflect additional UV radiation back toward your skin, increasing exposure. That’s why the local UV index for your exact location and time is the most useful measure of sun exposure.
The UV index combines the key factors that affect ultraviolet radiation into a simple number, helping you understand your sun exposure risk and choose the right protection. Depending on the UV level, you may need sunscreen, a hat, sunglasses, protective clothing, or shade. skin.
The UV Index