The city's climate is at its nicest in the spring and autumn, when the temperature is just suitable for wandering without being too hot. Easter is the busiest time of year with large numbers of visitors, and film festivals in September and October are attractions of fall. Whereas, late September offers warm weather suitable for exploring beaches close to Lisbon. Being shoulder seasons in tourism, these months offer tourists affordable packages along with numerous fun-filled activities for a memorable trip to Lisbon.

December to Easter is the low season for travellers, providing an ideal opportunity for individuals who prefer to have fun and explore in peace, i.e. without crowds. Furthermore, lodging rates are at an all-time low, and lines at even the most famous attractions are dramatically reduced. Budget travellers should visit during this time period to avoid crowds and save money on lodging and transportation while also experiencing the majesty of the city. There will be plenty of holiday-themed events, street markets, and restaurant menus to make your trip memorable.

Every summer, Lisbon boasts a jam-packed programme of activities that draw visitors from all over the world. While there is so much to explore and numerous things to do, it is also fascinating to mingle with people at music festivals and the arraiais. Although the crowds result in expensive prices for accommodation, food, and activities. Since there are no schools, nearby beaches and other Lisbon attractions get overrun with people, making it difficult to secure seats at established restaurants, cafes, and pubs.

Lisbon experiences its coldest weather in January when the temperature ranges from 15 to 8 degrees Celsius. After New Year's, there is a noticeable decline in tourism, which results in hotels offering discounted prices and shorter queues at popular local sites. Not-to-be-missed events include the New Year's Concert at the Centro Cultural de Belém and Dia de Reis.

Despite slightly warmer temperatures (high 16 °C and low 9 °C) than in January and even less probability of rain, it is still very cold in Lisbon in February. This is a fantastic time of year for sightseeing for it being a shoulder month. Numerous hotels offer discounted rates, and there are few crowds at the attractions. Carnaval parades fill the streets the weekend before Shrove Tuesday.

March sees a small increase in temperature, ranging from 18 °C to 11 °C with rain unlikely. There is a minor increase in hotel rates, although this time of year is not very busy in terms of crowds and lineups at attractions. You can attend Portugal's oldest independent Fashion Week, ModaLisboa or the annual Lisboa Dance Festival in March in Lisbon.

It's the beginning of spring, with average temperatures of 16 °C. It is the month of Easter Day, Peixe em Lisboa, The Arts and Antiques Fair, and Freedom Day, drawing a large number of travellers, contributing to an increase in accommodation prices and lengthening queues at attractions. The pleasant weather makes April the best time to visit Lisbon and hike its seven hills.

The dry season has begun, with Spring in full bloom and temperatures ranging between 22 and 14 °C. However hotel prices are a bit more than in January and February, but they are still less than during the summer peak season. The annual highlights of May in Lisbon are Indie Lisboa, Lisbon Under Stars, and ARCO Lisboa.

June, the start of the summer season and the best time to visit Lisbon to take advantage of the adjacent beaches, can see temperatures as high as 26 °C. Hotel and activity costs increase; so buy your tickets early to get the best rates. Rock in Rio, St. Anthony's Night, and Portugal Day are not-to-be-missed events of the June month.

With an average temperature touching 23 °C, July is one of the hottest months in Lisbon. It also has the longest days, with the sun shining for about 11 hours. Be prepared for extended beach days, plenty of outdoor dining, and festival hopping. The Super Bock Super Rock, NOS Alive, and EDP Cool Jazz are important events one must attend.

August is the hottest month in Lisbon and the peak tourist season, with temperatures ranging from 28°C to 19°C. Although locals choose to visit other cities in Portugal and abroad during this time, the city is bustling with visitors from all over the world. Jazz em Agosto and CCB Summer are two not to be missed events of August.

September is a shoulder tourist month due to the end of summer and the start of the school year for residents. Mornings and nights are cooler, but the weather remains warm and sunny, with an average temperature of 22 °C. It is the best time to visit Lisbon for some peaceful exploration and activities such as MOTELx, the International Queer Film Festival, and Santa Casa Alfama.

With the fall season setting in, you will find the city filled with smoke and the aroma of roasting chestnuts. Lisbon's October weather is just right for outdoor activities because it's neither too cold nor too warm. Moda Lisboa, Doclisboa, and Festa do Cinema Francês are three major events in October that are worth exploring.

With a daytime high of 18 °C, November is one of the wettest months. The best time to visit Lisbon is now if you dislike crowds. Prices for lodging are at an all-time low, and there are no long lines to enter attractions or museums. The LEFFEST film festival is the attraction of the November visit to Lisbon.

Rain and 12 °C average temperatures characterise the final month of the year in Lisbon. The cost of hotels is still reasonable, and many are offering unique Christmas packages. Visit one of the many Christmas markets in the city and take in the beautiful holiday lights that are displayed throughout. Rossio Square's market is by far the most well-liked.