Is the ultraviolet light strong on a cloudy day?

Cloudy days are also a type of weather. Many people think that cloudy days are not as good as sunny days, and the sun is not as big as on sunny days, so there is no need to worry about ultraviolet rays on cloudy days. Some people are very concerned about the issue of whether the ultraviolet rays are strong on cloudy days. In fact, this is a misunderstanding. There is ultraviolet light even on cloudy days.

1. Ultraviolet light is everywhere

Ultraviolet rays are sometimes particularly strong in cloudy or rainy weather, because clouds mainly reflect visible light, while ultraviolet rays are not reflected, so ultraviolet rays will not be weakened much when it is cloudy or rainy. As the hot summer approaches, more and more people are aware of the damage that ultraviolet rays can do to the skin. However, ultraviolet rays from the sun are present every day, but the strength varies. You can be exposed to ultraviolet rays on cloudy days, sunny days, summer, winter, outdoors, and even indoors. It is a new concept of sun protection and skin care that is worth promoting to take corresponding simple protection and key protection according to the strength of ultraviolet rays, and use high-quality sunscreen products suitable for daily use.

2. Ultraviolet rays are very strong on cloudy days

Clouds have almost no shielding effect on UVA ultraviolet rays. All UVA ultraviolet rays can penetrate the clouds, which means that 90% of ultraviolet rays can penetrate the clouds. Only dark and thick rain clouds can block some ultraviolet rays.

3. Misconceptions

There is no need to worry about sun exposure on cloudy days. This is a misunderstanding that many people fall into. In fact, most of the ultraviolet rays in sunlight can penetrate thin clouds. If the clouds are thick, they can only provide a certain degree of protection. On cloudy days, the ultraviolet rays are very strong, and the clouds have almost no isolation effect on UVA ultraviolet rays. All UVA ultraviolet rays can penetrate the clouds, which means that 90% of ultraviolet rays can penetrate the clouds. Only dark and thick rain clouds can block some ultraviolet rays. It’s not that it’s stronger than sunny days, but cloudy days also have strong ultraviolet rays, and people have no awareness of protection and are prone to ignore it, resulting in bad consequences.