Lisbon weather is warm with sunny spring and summer days (June to August), when average temperatures frequently reach 82ºF (28ºC). Winter in Lisbon (December to February) is wet and windy, with average temperatures dropping to 46ºF (8ºC) lows. The best time to visit Lisbon is in the spring (March to May) or autumn (September to October), because the weather is warm, hotels are cheaper, and the crowds are smaller than in the summer peak season.
