UV Index
UV Index
Today's UV index in London, United Kingdom 
will be up to 6.8, indicating a high level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-05-30
With London's UV index reaching 6.8, protect your skin from harm by staying in shade, wearing protective clothing, and applying SPF 30+ sunscreen every 2 hours, especially between 10 a.m. and 4 p.m. when UV rays are strongest.
London's UV index usually ranges from low to moderate, around 1 to 5, peaking during the summer months in June and July. Winters have very low UV levels near 0 or 1.
Seasonally, London has mild summers with average highs around 22°C (72°F) and cool winters averaging 2-8°C (36-46°F). Rain is spread throughout the year, often cloudy or drizzly.
Compared to other UK cities, London's weather is relatively mild and less rainy than places in the northwest. Its UV index is similar to other parts of southern England but lower than southern European countries like Spain or Italy.
See the UV index hour by hour for London, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.