UV Index
UV Index
Today's UV index in Londonderry, United Kingdom 
will be up to 5.5, indicating a moderate level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-29
With a UV index reaching up to 5.5 in Londonderry, stay shaded during midday when the sun is strongest; wear protective clothing, a wide-brimmed hat, UV-blocking sunglasses; apply SPF 30+ sunscreen every 2 hours, even on cloudy days; and be cautious of heightened UV on bright surfaces.
The UV index in Londonderry is generally low, usually ranging from 1 to 4 throughout the year. It rarely reaches high levels due to the northern latitude and frequent cloud cover.
Londonderry experiences cool summers and mild winters. Rain is fairly evenly spread across the year, making it often overcast and damp. Snowfall can happen but is usually light and not common.
Compared to the rest of the UK, Londonderry is cooler and wetter. It tends to be cloudier than southern England but less cold than some inland parts of Scotland. Neighboring Ireland has similar weather, with slightly milder temperatures near the coast.
See the UV index hour by hour for Londonderry, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.