Canadian UV Index

0 to 2: Low

UV Index Low - Green
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.

3 to 5: Moderate

UV Index Moderate - Yellow

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.

6 to 7: High

UV Index High - Orange

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.

8 to 10: Very High

UV Index Very High - Red

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.

11 or more: Extreme

UV Index Extreme - Purple

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.
Source: Environmental Protection Agency.

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