With a UV index reaching up to 5.8 in Lisbon, 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.
Read more here about the climate and sun exposure in and around Lisbon.
The UV index in Lisbon typically ranges from 5 to 8. This means that during most days, the sun's ultraviolet (UV) radiation is high, posing a risk of sunburn and increasing the chances of skin damage. It is important to protect yourself by wearing sunscreen, seeking shade, and wearing clothing that covers your skin.
Lisbon experiences a Mediterranean climate, with mild winters and warm summers. From December to February, temperatures range from 8 °C to 15 °C (46 °F to 59 °F) and may occasionally drop even lower. Spring (March to May) brings pleasant temperatures between 12 °C and 20 °C (54 °F and 68 °F), while summer (June to August) heats up to an average of 26 °C to 30 °C (79 °F to 86 °F). Autumn (September to November) sees temperatures ranging from 15 °C to 25 °C (59 °F to 77 °F), gradually cooling down.
Compared to its region, Lisbon enjoys a higher amount of sun exposure due to its coastal location. The Atlantic Ocean helps moderate temperatures, keeping them cooler in the summer and milder in the winter compared to inland areas. However, this coastal proximity also means that Lisbon can experience occasional fog and lower temperatures when compared to cities further inland.
The chart above displays the Shortwave Radiation Sum (MJ/m²) for each day of the last year in Lisbon. It's designed to provide you with a better understanding of the yearly weather and sun exposure.