Home / Editor's Pick /

As autumn begins: High UV Index in coming days

06:00
9 September 2023

As autumn begins
High UV Index in coming days

sun flare

It might be the start of meteorological autumn but the weather has other plans for us, with a return of summer through this week.

During summer the UV index in the UK can reach high levels daily beneath unbroken sunshine. Even on a cloudy day, UV levels can still be high with UV able to be reflected and scattered in the clouds.

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. It can pass through windows and clouds and penetrates deep into our skin, leading to ageing and increasing 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 UV radiation and faster the skin will burn.

This week, UV levels could reach 'High' for your area as temperatures rise into the mid-to-high twenties beneath plenty of sunshine, reaching 6 or 7 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 inside our app!

With cloudless skies expected this week despite it being the start of autumn, your skin can still burn. Check the WeatherRadar for the latest.

Weather & Radar editorial team
More on the topic
Friday 20 June 2025

Storms after the heat

Thunderstorm warnings for the weekend
Friday 27 June 2025

Noctilucent clouds

Season of the shimmering clouds
Thursday 26 June 2025

National parks and coasts

Isolated wind warnings in places
All weather news
This might also interest you
Monday 30 June 2025

Take precautions

Heatwave takes grip once again
Monday 23 June 2025

Breakfast brief

Cooler but much gustier
Thursday 19 June 2025

Breakfast brief

First day of 30°C+ heat
All articles
Weather & Radar

www.weatherandradar.ie

facebooktwitteryouTubeContact uslinkList
Privacy Policy | Legal info | Accessibility statement