Advertise Here

View All Articles

The Ultraviolet (UV) Index Scale

The Ultraviolet Radiation Scale or UV Index scale represents the risk of sun exposure and steps to protect yourself from UV radiation are listed below

 

Ultraviolet (UV) Index Scale

Ultraviolet (UV) Index Scale


UV Index 0 to 2 (Low)

A UV Index reading of 0 to 2 means low danger from the sun’s UV rays for the average person.

  • Wear sunglasses on bright days.
  • If you burn easily, cover up and use broad spectrum SPF 30+ sunscreen.
  • Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

UV Index 3 to 5 (Moderate)

A UV Index reading of 3 to 5 means moderate risk of harm from unprotected sun exposure.

  • Stay in shade near midday when the sun is strongest.
  • If outdoors, wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses.
  • Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
  • Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

UV Index 6 to 7 (High)

A UV Index reading of 6 to 7 means high risk of harm from unprotected sun exposure. Protection against skin and eye damage is needed.

  • Reduce time in the sun between 10 a.m. and 4 p.m.
  • If outdoors, seek shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses.
  • Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
  • Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

UV Index 7 to 10 (Very High)

A UV Index reading of 8 to 10 means very high risk of harm from unprotected sun exposure. Take extra precautions because unprotected skin and eyes will be damaged and can burn quickly.

  • Minimize sun exposure between 10 a.m. and 4 p.m.
  • If outdoors, seek shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses.
  • Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
  • Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

UV Index11+ (Extreme)

A UV Index reading of 11 or more means extreme risk of harm from unprotected sun exposure. Take all precautions because unprotected skin and eyes can burn in minutes.

  • Try to avoid sun exposure between 10 a.m. and 4 p.m.
  • If outdoors, seek shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses.
  • Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days, and after swimming or sweating.
  • Watch out for bright surfaces, like sand, water and snow, which reflect UV and increase exposure.

The Shaddow Rule

An easy way to tell how much UV exposure you are getting is to look for your shadow:

  • If your shadow is taller than you are (in the early morning and late afternoon), your UV exposure is likely to be lower.
  • If your shadow is shorter than you are (around midday), you are being exposed to higher levels of UV radiation. Seek shade and protect your skin and eyes.

Related Information on Ultraviolet (UV) Radiation:

  1. What is Ultraviolet (UV) Radiation?
  2. The Ultraviolet (UV) Index Scale
  3. Download EPA UV Facts Sheet on Ultraviolet (UV) Radiation
This entry was posted in Basic Meteorology and tagged , , , , , , , , , , , . Bookmark the permalink.

Leave a Reply

Read More

What is the difference between weather and climate?

What is the difference between weather and climate: “Weather” describes the temporary changes in the atmosphere, and “climate” refers to long-term changes in weather in a specific location over time. Weather Vs Climate: We hear the…

Read More

iAlert.com Weather Services For Business

 iAlert.com Weather Services for Business Workplace safety and business continuity is important to every business and organization, yet most companies do not properly plan for threatening weather that disrupts business effectiveness and employee safety. Every…

Read More

Hurricane Laura Social Media Storm Reports

Hurricane Laura made landfall near Cameron, Louisiana around 1:00 am CDT on August 27, 2020 as a strong Category 4 storm with sustained of 150 mph he strongest land-falling system to reach the state of Louisiana…

Read More

Leave a Reply