# UV Index Today

> Free live UV index by location, short-range UV outlook, and practical sun-safety guides.

UV Index Today helps people plan outdoor time using the current UV index for their approximate area, today's peak estimate, and sourced notes on sunscreen and UV exposure. Readings are for everyday sun-safety planning and are not medical advice. Guide and Blog pages are written by UV Index Today editors and cite WHO, FDA, EPA, IARC, and other public sources.

## Core

- [Home](https://uvindex.cc/): Live UV index, peak estimate, and next-few-hours outlook for your location
- [Blog](https://uvindex.cc/blog): Planning notes (editorial)
- [Regions](https://uvindex.cc/regions): Browse UV index by country and region
- City pages (`/city/{country}-{region}-{city}`): Live UV dashboard for a specific city from recent cache
- [SPF Calculator](https://uvindex.cc/tools/spf-calculator): Burn-time and SPF recommendation from skin type + UV index
- [Guide](https://uvindex.cc/guide): FAQ-style Q&A on solar UV and sunscreen, with source lists
- [FAQ](https://uvindex.cc/faq): Common questions about UV readings, location detection, and site use
- [About](https://uvindex.cc/about): Who writes the site, how pages are sourced, and how to send corrections
- [Contact](https://uvindex.cc/contact): Email contact for feedback and privacy requests

## Blog

- [How to Use a Live UV Index Before You Go Outside](https://uvindex.cc/blog/how-to-use-live-uv-index-outdoors): Current, peak, and next-few-hours on this site
- [The Bottle SPF Assumes a Coat You Rarely Put On](https://uvindex.cc/blog/label-spf-assumes-a-thicker-coat): Lab SPF is a 2 mg/cm² film; typical use is thinner, so the bottle number is not the skin number
- [Polarized Is Not a UV Rating](https://uvindex.cc/blog/polarized-is-not-a-uv-rating): Polarization is glare control; UV400 / 100% UVA·UVB is the UV line
- [The Burn Shows Up After You Leave](https://uvindex.cc/blog/the-burn-shows-up-after-you-leave): Labs score sunburn 16–24 hours later
- [Same Latitude Is Not the Same UV](https://uvindex.cc/blog/same-latitude-is-not-the-same-uv): Southern-hemisphere summer can run ~40% higher UV than matching northern latitudes
- [Hours at UV 4 Can Outdose Minutes at UV 8](https://uvindex.cc/blog/hours-at-uv-4-can-outdose-minutes-at-uv-8): The index is a rate, not a daily budget
- [A Shadow Shorter Than You Means High UV](https://uvindex.cc/blog/short-shadow-means-high-uv): Sun above 45°; WHO protect-at-3 often arrives earlier
- [Broken Clouds Can Raise UV Above a Clear Sky](https://uvindex.cc/blog/broken-clouds-can-raise-uv): Nearby cloud can bounce extra UV when the disc is still visible
- [A Baseball Cap Leaves the Ears and Neck](https://uvindex.cc/blog/a-baseball-cap-leaves-the-ears): A visor is not a brim
- [A Cotton T-Shirt Barely Blocks UV](https://uvindex.cc/blog/a-cotton-t-shirt-barely-blocks-uv): Everyday tees often near UPF 7 dry, ~UPF 3 wet
- [UV Still Hits You Underwater](https://uvindex.cc/blog/uv-still-hits-you-underwater): Cool water is not shelter
- [Higher Elevation Means Stronger UV](https://uvindex.cc/blog/altitude-raises-uv): About 10–12% more UV per 1,000 m (WHO)
- [UV Peaks Before the Day Feels Hottest](https://uvindex.cc/blog/uv-peaks-before-the-heat): Solar noon vs afternoon heat lag
- [Shade Cuts Direct Sun. It Does Not Cancel UV.](https://uvindex.cc/blog/shade-does-not-cancel-uv): Snow, sand, and sky scatter still reach you
- Dated weather briefs remain on /blog (Phoenix, Europe, UAE, Kyushu, Nepal glacier); treat them as dated, not evergreen

## Sunscreen Essentials

- [What Does SPF Stand For?](https://uvindex.cc/guide/spf-meaning): How SPF numbers are calculated and their limits
- [How Does Sunscreen Work?](https://uvindex.cc/guide/how-sunscreen-works): Physical vs chemical UV protection
- [How Long Does Sunscreen Last?](https://uvindex.cc/guide/sunscreen-duration): Reapplication timing
- [Does Sunscreen Expire?](https://uvindex.cc/guide/sunscreen-expire): Shelf life and heat
- [Does Sunscreen Prevent Tanning?](https://uvindex.cc/guide/sunscreen-prevent-tanning): UVA still gets through
- [Does Sunscreen Cause Cancer?](https://uvindex.cc/guide/sunscreen-does-not-cause-cancer): UV causes skin cancer; sunscreen lowers dose

## Everyday UV Protection

- [What UV Index Requires Sunscreen?](https://uvindex.cc/guide/uv-index-sunscreen): WHO protect-from-3
- [Does Glass Block UV Light?](https://uvindex.cc/guide/glass-block-uv-light): Windows block UVB more than UVA
- [Do Car Windows Block UV?](https://uvindex.cc/guide/car-windows-block-uv): Windshield vs side glass

## UV & Your Health

- [Can UV Light Cause Cancer?](https://uvindex.cc/guide/uv-light-cause-cancer): IARC/WHO Group 1 UV
- [UV Rays for Tanning](https://uvindex.cc/guide/uv-rays-tanning): No safe cosmetic-tanning UV

## UV Index Records

- [Highest UV Index Ever Recorded](https://uvindex.cc/guide/highest-uv-index): Cabrol et al. Licancabur ~43.3
- [Places with the Highest UV Index](https://uvindex.cc/guide/highest-uv-index-location): High Andes and other altitude belts

## Policy

- [Privacy Policy](https://uvindex.cc/privacy): Location, cookies, and analytics
- [Terms of Service](https://uvindex.cc/terms): Informational use and liability limits
- [Sitemap](https://uvindex.cc/sitemap.xml): Full URL list for crawlers