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UV Index in London, GB

UV index


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Today's UV index in London, United Kingdom United Kingdom will be up to 1.4, indicating low risk of harm from the sun's UV rays for the average person. Check our tips for today to make sure you're safe in the sun.


Today's tips

Today, the UV index suggests low sun danger (0-2) in London, reaching up to 1.4. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.

London Weather

Read more here about the climate and sun exposure in and around London.

UV Index in London

The UV index in London can vary throughout the year, with higher values typically occurring from April to September. On a scale from 0 to 11+, London's UV index can reach values of 6 (moderate) to 8 (very high) during summer months. This means taking precautions against sunburn and skin damage is important, such as wearing sunscreen, sunglasses, and a hat when outdoors.

Weather Seasons

UV index

London experiences four distinct weather seasons. Spring (March to May) brings mild temperatures ranging from 9 to 15 °C (48 to 59 °F) and occasional rain showers. Summer (June to August) is generally warm with temperatures averaging between 15 and 25 °C (59 and 77 °F), though heatwaves can push the mercury higher. Autumn (September to November) sees cooler temperatures around 9 to 16 °C (48 to 61 °F) and more frequent rain. Winter (December to February) is typically cold, with temperatures ranging from 2 to 8 °C (36 to 46 °F) and occasional snowfall.

London's Climate

Compared to its southern England region, London experiences a slightly milder climate due to its urban heat island effect. However, it still maintains a similar sun exposure pattern. The region experiences an average of 1,480 hours of sunshine per year, with the sunniest months being May to July. Despite this, London's weather can be quite changeable, so it's always advisable to check the forecast before planning any outdoor activities.

Annual Sun Radiation

The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in London. It's designed to provide you with a better understanding of the yearly weather and sun exposure.


* This page's content about the UV index in London (United Kingdom) is for educational and informational purposes only. The developers and data providers are not liable for the accuracy, reliability, or availability of the information. The information is not a substitute for professional medical advice, and the developers and data providers are not medical professionals. Seek advice from a qualified health provider for any medical concerns, and do not disregard medical advice or delay seeking it based on the information provided on this site.