Home
Weather London
WeatherRadar
RainfallRadar
TemperatureRadar
WindRadar
LightningRadar
Weather News
Editor's Pick
Discover the app
Weather widget
Contact us
Apps
Career
    Home / Editor's Pick /

    Understanding the UV-Index

07:00
10 March 2022

As the spring sun arrives...
Understanding the UV-Index

With spring here we will soon be spending more time outdoors as conditions brighten. But with sunnier days comes increased ultraviolet (UV) radiation.

UV radiation is a type of energy produced by the sun ray's and is the main cause of skin cancer.

Even on a cloudy day, UV levels can be high with UV able to be reflected and scattered in the clouds.

uv-skin

There are three types of UV rays: UVA, UVB, and UVC. UVC is the most dangerous form of UV radiation, but luckily this is absorbed by the atmosphere before it reaches Earth.

UVB penetrates the top layer of the skin and leads to sunburn.

UVA is the most potent source which we are exposed to all year long. UVA can even pass through windows and clouds and penetrates deep into our skin leading to ageing and increases our risk of skin cancer.

Because of the dangers associated with increased levels of UV, particularly in the spring and summer months when UV radiation is at its strongest, the UV Index was created.

The higher the UV Index, the stronger the strength of the UV and faster skin will burn.

Across the UK and Ireland, UV levels tend to reach 7 on the UV Index on the hottest days. At this level there is a risk of burning within 30-60 minutes.

As we spend more time outside, be sure to check the UV Index level near you through the local forecast!

Ryan Hathaway
More on the topic
Temperature map of southeast England showing overnight low temperatures, with Kenley highlighted at 21.3°C and surrounding areas in yellow-orange shades indicating mild nighttime conditions.
Tuesday, 26 May 2026

May heatwave

Tropical night breaks overnight record
Split image showing a nighttime lightning strike beneath storm clouds on the left and a lightning detection map with dense storm activity across central England on the right.
Wednesday, 27 May 2026

Trickier than you think

Why it's hard to pinpoint thunderstorms
Split image showing a European weather map with low-pressyre system, temperature bands, and thunderstorm icon on the left, and a bright rainbow over green countryside and mountains on the right.
Wednesday, 27 May 2026

Early summer ends

A change in the weather is on the way
All weather news
This might also interest you
Split image showing aerial flooding in a town with muddy water covering roads on the left, and a rural road on the right blocked by heavy snowfall with vans stopped and a person walking in snow.
Tuesday, 27 January 2026

Storm Chandra

Flooding, gales, and heavy snow
Illustration of white and yellow fireworks on a blue background.
Wednesday, 31 December 2025

Hello 2026

Happy New Year
plit image showing a double rainbow over a rocky shoreline on the left and sheep grazing in a green field under stormy clouds on the right.
Sunday, 2 November 2025

Your weather - Your shots

Mixed conditions on an unsettled week
All articles
Weather & Radar

Weather & Radar is also available on

Google Play StoreApp Store

Company

Contact us Privacy Policy Legal info Accessibility statement

Services

Uploader

Socials

facebooktwittertikToklinkList