Lisbon is a year round destination, as the climate is mild and there are no extreme weather conditions. In winter the temperatures are around 9ºC - 11ºC. Last time it snow in Lisbon was 50 years ago. In the summer sometimes can be hot (28ºC - 33ºC), nothing that a nap after lunch won't help. The ending afternoon light is magnificent and warm. Sometimes the nights can be a little chilly because of the soft breeze from the Atlantic.