Today, the UV index suggests low sun danger (0-2) in Lyon, reaching up to 1.1. 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 Lyon.
Lyon experiences a UV index ranging from moderate to high throughout the year. In summer (June to August), the UV index can reach levels of 8 (high), which means it is essential to take precautions like wearing sunscreen and protecting your skin from direct sun exposure. Even in the colder months, such as winter (December to February), the UV index can still be moderate, around 4 (moderate), so it's a good idea to be mindful of sun protection year-round in Lyon.
Lyon has distinct seasons, with warm summers and cold winters. Summer temperatures average around 25 °C (77 °F), with occasional heatwaves pushing the mercury into the high 30s °C (mid-90s °F). Spring (March to May) and autumn (September to November) offer pleasant weather, with temperatures ranging from 10 °C to 20 °C (50 °F to 68 °F). Winters in Lyon can be chilly, with average temperatures ranging from 2 °C to 7 °C (36 °F to 45 °F). Snowfall is infrequent but possible during winter months.
Compared to its region, Lyon enjoys a moderate level of sun exposure. Cities in the south of France, like Marseille and Nice, receive more sunlight hours annually due to their proximity to the Mediterranean Sea. Nonetheless, Lyon still averages around 2,000 annual hours of sunshine. Its location in the Rhône-Alpes region provides a mix of continental and Mediterranean influence, resulting in a pleasant climate with warm summers and relatively mild winters.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Lyon. It's designed to provide you with a better understanding of the yearly weather and sun exposure.