Window Film Blog
An image depicting the UV Index scale

The UV Index

We all know that UV light is harmful to us so its important to be aware of the UV index for your area when you are planning to spend time outdoors.

What is the UV Index?

The UV Index, or Ultraviolet Index, is a scale that measures the strength of ultraviolet (UV) radiation from the sun at a specific time and location. It was developed by the World Health Organization (WHO), the United Nations Environment Programme (UNEP), and the World Meteorological Organization (WMO) to help raise public awareness about the risks of sun exposure and encourage people to take appropriate sun protection measures.

The UV Index is based on a scale from 1 to 11+, with each level indicating a different risk of skin damage due to UV radiation:

Low (1-2):

There is minimal risk of skin damage for the average person. It is still a good idea to wear sunglasses and apply sunscreen with an SPF of at least 15 if you have fair skin or are prone to sunburn.

Moderate (3-5):

Sun protection is necessary during midday hours, especially for people with fair skin. Wear protective clothing, sunglasses, and sunscreen with an SPF of at least 30.

High (6-7):

Sun protection is essential. Reduce time in the sun between 10 a.m. and 4 p.m., wear protective clothing and sunglasses, and use sunscreen with an SPF of at least 30.

Very High (8-10):

The risk of skin damage is significantly increased. Minimize sun exposure between 10 a.m. and 4 p.m., wear protective clothing and sunglasses, and use sunscreen with an SPF of at least 30 or higher.

Extreme (11+):

The risk of skin damage is highest at this level. Avoid sun exposure between 10 a.m. and 4 p.m., seek shade, wear protective clothing and sunglasses, and use sunscreen with an SPF of at least 30 or higher.

The UV Index can vary depending on several factors, such as time of day, altitude, latitude, cloud cover, and ozone levels.

Where can you find your UV index?

It is essential to be aware of the UV Index in your area to determine the appropriate sun protection measures. There are a couple of sources of this information in the U.S.:

  • The United States Environmental Protection Agency (EPA) provides UV Index information on its website. You can search for the UV Index by ZIP code or city and state. Visit the EPA’s UV Index Seach Page.
  • The National Weather Service, a division of the National Oceanic and Atmospheric Administration (NOAA), also provides UV Index forecasts on its website. Visit the NOAA National Weather Service website to access their UV forecast map.

Alternatively, you can also check local weather websites or mobile apps for UV Index information in your area.

How to protect yourself when the UV index is high

There are several basic ways to protect yourself from UV rays:


Sunscreen is a must-have for anyone who spends time outdoors. Choose a broad-spectrum sunscreen with an SPF of at least 30, which will shield your skin from both UVA and UVB rays. Apply it generously and reapply every two hours, especially after swimming or sweating.

Protective Clothing:

Wear long-sleeved shirts, pants, and wide-brimmed hats to shield your skin from the sun. Opt for clothing with a UPF (Ultraviolet Protection Factor) rating to ensure adequate protection.


UV rays can also damage our eyes, leading to cataracts and other eye problems. Invest in sunglasses that block 100% of UVA and UVB rays.

Seeking Shade:

Limit sun exposure during peak UV hours, typically between 10 a.m. and 4 p.m. Seek shade when possible, especially during these peak hours.

Window Film and UV Index

While these strategies are effective when outdoors, we also need to consider our indoor environment when the UV Index is high. UV rays can penetrate glass windows, exposing us to harmful rays even while inside our homes or cars. This is where window film installation comes in.

Window films are thin layers of material applied to the interior surface of glass windows, which can block a significant percentage of UV rays. Here are the benefits of installing window film on your home and car:

UV Protection:

High-quality window films like ComforTech™ Ceramic Series can block up to 99% of harmful UVA and UVB rays, significantly reducing the risk of skin cancer, premature aging, and eye damage.

Energy Efficiency:

Window films can reduce heat gain, keeping your home and car cooler during the summer months. This reduces the strain on your air conditioning system, leading to energy savings and lower utility bills.

Fade Reduction:

UV rays can cause your furniture, carpets, and artwork to fade over time. By blocking UV rays, window films can prolong the life of your valuables and maintain their appearance.

Glare Reduction:

Window films can minimize glare, making it more comfortable to watch television, work on a computer, or simply enjoy the view from your home or car.

Privacy and Security:

Certain window films can provide increased privacy and deter potential break-ins by making it harder to see inside your home or vehicle. Our ComforTech™ 05 and 15 are great choices to add daytime privacy to your home.


In conclusion, understanding the UV Index and taking appropriate protective measures is vital for our overall health and well-being. By staying informed about the UV Index in your area, you can make informed decisions about sun exposure and protection. Remember to use sunscreen, wear protective clothing, sunglasses, and seek shade during peak UV hours. Additionally, consider installing window film on your home (like ComforTech Ceramic Series and car to protect yourself from harmful UV rays even when indoors. By following these guidelines and staying vigilant, we can minimize the harmful effects of UV radiation and enjoy a healthier, safer outdoor experience.

Connect for News, Deals and Product Info