UV Index
UV Index
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Today's UV index in London, Canada 
will be up to 1.5, 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, the UV index suggests low sun danger (0-2) in London, reaching up to 1.5. Remember sunglasses and SPF 30+ on sunny days, and be cautious around reflective surfaces like sand, water, and snow for increased UV exposure.
Read more here about the climate and sun exposure in and around London.
The UV index in London, Canada, is an important factor to consider when planning outdoor activities. During the summer months, the UV index in London can reach high levels, typically peaking between 9 and 10 (very high to extreme). It is essential to protect your skin and eyes from the sun's harmful rays by wearing sunscreen, sunglasses, and protective clothing.
London experiences four distinct seasons: spring, summer, fall, and winter. Spring in London is mild, with temperatures averaging around 14-16 °C (57-61 °F). Summers are warm and humid, with temperatures ranging between 25-28 °C (77-82 °F). Fall is characterized by cooler temperatures, typically varying from 10-13 °C (50-55 °F). Winters in London are cold, with temperatures averaging around -5 to -2 °C (23-28 °F) during the day and dropping even further at night.
Compared to its region, London enjoys a moderate amount of sun exposure throughout the year. However, it experiences a fair share of cloudy days, especially during the fall and winter seasons. On average, London receives approximately 2045 hours of sunshine per year, with March and July being the sunniest months. The region's climate is influenced by the Great Lakes, which can lead to lake-effect snowfall during the winter months.
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.