UV Ratings

UV Ratings and What the Numbers Mean to You

The UV index is an international standard measurement of how strong the ultraviolet (UV) radiation from the sun is at a particular place on a particular day. It is a scale primarily used in daily forecasts aimed at the general public. Developed by the National Weather Service and EPA, it indicates the strength of solar UV radiation on a scale from 1 (low) to 11+ (extremely high). You can use the UV Index to take appropriate sun-protective behaviors and avoid overexposure to UV radiation.

Below are the precautions you should take provided the UV Index number:

UV		Suggestion
0-2		Minimal protection is needed – Wearing a hat is sufficient
3-4		Low – Hat and sunscreen with at least SPF 15 is recommended
5-6		Moderate – Wearing a hat, applying sunscreen with at least SPF 15 and taking shade whenever possible is recommended
7-9		HIGH – In addition to the precautions recommended above, it is advised to stay indoors between 10am and 4pm
10+		VERY HIGH – In addition to the precautions recommended above, it is advised to stay indoors if possible

 

Sunburn Time
Over 9		Less than 15 minutes
7-9		About 20 minutes
4-7		About 30 minutes
0-4		More than 1 hour

 

Take Precaution

1. Seek shade whenever possible
2. Wear protective clothing that covers your arms and legs as well as your body
3. Wear a hat that shades your face and neck
4. Wear wraparound sunglasses
5. Apply SPF 30+ water-resistant sunscreen every 2 hours.