DermUV
UV Index by City
Browse DermUV city pages with live UV index readings, hourly forecasts, monthly UV averages, and internal links to nearby cities.
Popular US city UV pages
These pages cover high-search-volume cities and pass link equity into the full city database.
- UV Index New York, NY
- UV Index Los Angeles, CA
- UV Index Chicago, IL
- UV Index Houston, TX
- UV Index Phoenix, AZ
- UV Index Philadelphia, PA
- UV Index San Antonio, TX
- UV Index San Diego, CA
- UV Index Dallas, TX
- UV Index Austin, TX
- UV Index Jacksonville, FL
- UV Index Fort Worth, TX
- UV Index Columbus, OH
- UV Index Charlotte, NC
- UV Index Indianapolis, IN
- UV Index San Francisco, CA
- UV Index Seattle, WA
- UV Index Denver, CO
- UV Index Washington, DC
- UV Index Boston, MA
- UV Index El Paso, TX
- UV Index Nashville, TN
- UV Index Detroit, MI
- UV Index Oklahoma City, OK
International UV pages
DermUV also covers major global cities where tropical, high-altitude, desert, and coastal UV patterns differ substantially.
- UV Index London, England
- UV Index Paris, Île-de-France
- UV Index Tokyo, Tokyo
- UV Index Sydney, NSW
- UV Index Melbourne, VIC
- UV Index Dubai, Dubai
- UV Index Singapore, Singapore
- UV Index Hong Kong, Hong Kong
- UV Index Barcelona, Catalonia
- UV Index Madrid, Madrid
- UV Index Rome, Lazio
- UV Index Berlin, Berlin
- UV Index Amsterdam, NH
- UV Index Toronto, ON
- UV Index Vancouver, BC
- UV Index Mexico City, CDMX
- UV Index Rio de Janeiro, RJ
- UV Index São Paulo, SP
How to read this UV Index by City page
The UV index is a measure of erythemal (skin-reddening) irradiance, where each whole point equals 25 mW/m² of UV energy reaching the surface. That is why burn-time estimates fall roughly by half when the index doubles.
UV strength on this page follows solar elevation, ozone thickness, cloud cover, altitude, and surface reflection. Snow can bounce back most of the UV that hits it, water and sand far less, but all of them add to the dose skin receives.
Plan outdoor blocks around the peak UV window, usually between 10am and 4pm local time. Shade, UPF fabric, a wide-brim hat, and UV-blocking sunglasses reduce dose more reliably than sunscreen alone.
Cloud cover is not protection. Thin or broken cloud can still pass most incoming UV, and light cloud edges can briefly scatter more UV toward the ground than a clear sky.
Cumulative dose drives photoaging and long-term skin damage more than any single day. Small daily exposures on commutes, walks, and driving add up across a season.
UV scale reference
The WHO scale groups UV 1-2 as low, 3-5 as moderate, 6-7 as high, 8-10 as very high, and 11 or above as extreme. Protection is recommended from UV 3 upward, and shade during the middle of the day becomes the priority from UV 8 upward.
A practical routine at moderate-to-high UV is roughly one ounce of broad-spectrum sunscreen for full-body coverage, applied 15 minutes before going out, then reapplied on schedule. Clothing, hats, and shade carry the rest of the load, especially for children and anyone with a history of easy burning.
Keep exploring DermUV
These pages give more depth around uv index by city, from UV-scale reference material to definitions and city forecasts.
- Live UV index today
- UVA and UVB explained
- Minimal erythemal dose
- What UV index 5 means
- UVB definition
- What UV index 11 means
- What UV index 10 means
All figures on DermUV are educational estimates built from public UV data and published dose literature. They are not personal advice.