UV Index
UV Index
When planning outdoor fun, it's smart to check the UV index for the day.
Are you near New York City?
The UV index measures how strong the sun's rays are, which can affect your skin if you're out too long.
Checking the UV index before going outside can help you be prepared, like wearing hats, sunglasses, and sunscreen.
Here's where the sun's rays are strongest in the world today:
The UV index measures sun strength from 0 to 11+. Higher numbers mean more risk for your skin.
The index considers things like time of day, clouds, how high you are, and ozone.
Some popular cities we track include New York City, Bangkok, Kuala Lumpur, San Diego, and Los Angeles.
Tanning can be fun, but it's important to know the risks. Tanning beds and sunlamps also give off UV rays that can hurt your skin.
Check the UV index today in your location before tanning. If it's high, it's best to stay protected or avoid tanning.
You can check the UV index easily with an app or our website. Lots of weather apps include this info.
Some apps even give personalized tips based on where you are and your skin.
The highest UV index ever recorded was 43.3 on December 29, 2003, on the Licancabur Volcano.
To give you an idea, this UV index is more like what you'd find on Mars than what's normal on Earth. Usually, UV index numbers are around the mid-20s, even in high places like the Andes.
This extreme UV-B radiation happened because of things like ozone loss, storms, fires, and a solar flare.
Explore our newly added monitored cities. If your city isn't listed, use the search button at the top of the page.
