When you visit Lisbon in the winter, you get the best of both worlds. All of the amazing sites in one of Europe's most popular cities, but for a lower price and with fewer people. Even if the weather is cooler than in the summer, Lisbon remains one of Europe's warmest and sunniest capitals at this time of year!
If you visit Portugal in the winter, you'll be able to get plenty of vitamin D. Lisbon has the most sunshine of any European capital city, even in the winter. In comparison to many European cities further north, the weather in Lisbon in December and January is relatively nice. Temperatures are still hovering around 15/16 degrees Celsius, with lows of about 8/9 degrees.
Sunny, crisp days are ideal for exploring because you won't sweat and it will be delightful to wander around and take in the views. Even though the weather in Lisbon is cloudy or rainy in the winter, the weather will most likely change shortly, and it will not be too chilly.
Wrap up warmly and enjoy the European pleasure of dining al fresco, with the sound of Fado music filling the air. Later in the piece, I'll go over what to wear in Lisbon during the winter.