Pisa has a borderline humid subtropical climate (Köppen climate classification: Cfa) and Mediterranean climate (Köppen climate classification: Csa). The city is characterized by cool to mild winters and hot summers. This transitional climate allows Pisa to have summers with moderate rainfall. Rainfall peaks in autumn. Snow is rare. The highest officially recorded temperature was 39.5 °C (103.1 °F) on 22 August 2011 and the lowest was −13.8 °C (7.2 °F) on 12 January 1985.

In Pisa there was a festival and game fr:Gioco del Ponte (Game of the Bridge) which was celebrated (in some form) in Pisa from perhaps the 1200s down to 1807. From the end of the 1400s the game took the form of a mock battle fought upon Pisa's central bridge (Ponte di Mezzo). The participants wore quilted armor and the only offensive weapon allowed was the targone, a shield-shaped, stout board with precisely specified dimensions. Hitting below the belt was not allowed. Two opposing teams started at opposite ends of the bridge. The object of the two opposing teams was to penetrate, drive back, and disperse the opponents' ranks and to thereby drive them backwards off the bridge. The struggle was limited to forty-five minutes. Victory or defeat was immensely important to the team players and their partisans, but sometimes the game was fought to a draw and both sides celebrated.

In 1677 the battle was witnessed by Dutch travelling artist Cornelis de Bruijn. He wrote:

"While I stayed in Livorno, I went to Pisa to witness the bridge fight there. The fighters arrived fully armored, wearing helmets, each carrying their banner, which was planted at both ends of the bridge, which is quite wide and long. The battle is fought with certain wooden implements made for this purpose, which they wear over their arms and are attached to them, with which they pummel each other so intensely that I saw several of them carried away with bloody and crushed heads. Victory consists of capturing the bridge, in the same way as the fistfights in Venice between the it:Castellani and the Nicolotti."

In 1927 the tradition was revived by college students as an elaborate costume parade. In 1935 Vittorio Emanuele III with the royal family witnessed the first revival of a modern version of the game, which has been pursued in the 20th and 21st centuries with some interruptions and varying degrees of enthusiasm by Pisans and their civic institutions.
• Capodanno pisano (folklore, March 25)
• Gioco del Ponte (folklore)
• Luminara di San Ranieri (folklore, June 16)
• Maritime republics regata (folklore)
• Premio Nazionale Letterario Pisa
• Pisa Book Festival
• Metarock (rock music festival)
• Internet Festival San Ranieri regata (folklore)
• Turn Off Festival (house music festival)
• Nessiáh (Jewish cultural Festival, November)

While the bell tower of the cathedral, known as "the leaning Tower of Pisa", is the most famous image of the city, it is one of many works of art and architecture in the city's Piazza del Duomo, also known, since the 20th century, as Piazza dei Miracoli (Square of Miracles), to the north of the old town center. The Piazza del Duomo also houses the Duomo (the Cathedral), the Baptistry and the Campo Santo (the monumental cemetery). The medieval complex includes the above-mentioned four sacred buildings, the hospital and few palaces. All the complex is kept by the Opera (fabrica ecclesiae) della Primaziale Pisana, an old non profit foundation that has operated since the building of the Cathedral in 1063 to maintain the sacred buildings. The area is framed by medieval walls kept by the municipal administration.

Other sights include:
• Knights' Square (Piazza dei Cavalieri), where the Palazzo della Carovana, with its façade designed by Giorgio Vasari may be seen. Sited on the square.
• Santo Stefano dei Cavalieri, church sited on Piazza dei Cavalieri, and also designed by Vasari. It had originally a single nave; two more were added in the 17th century. It houses a bust by Donatello, and paintings by Vasari, Jacopo Ligozzi, Alessandro Fei, and Pontormo. It also contains spoils from the many naval battles between the Cavalieri (Knights of St. Stephan) and the Turks between the 16th and 18th centuries, including the Turkish battle pennant hoisted from Ali Pacha's flagship at the 1571 Battle of Lepanto.
• St. Sixtus. This small church, consecrated in 1133, is also close to the Piazza dei Cavalieri. It was used as a seat of the most important notarial deeds of the town, also hosting the Council of Elders. It is today one of the best preserved early Romanesque buildings in town.
• St. Francis. The church of San Francesco may have been designed by Giovanni di Simone, built after 1276. In 1343 new chapels were added and the church was elevated. It has a single nave and a notable belfry, as well as a 15th-century cloister. It houses works by Jacopo da Empoli, Taddeo Gaddi and Santi di Tito. In the Gherardesca Chapel are buried Ugolino della Gherardesca and his sons.
• San Frediano. This church, built by 1061, has a basilica interior with three aisles, with a crucifix from the 12th century. Paintings from the 16th century were added during a restoration, including works by Ventura Salimbeni, Domenico Passignano, Aurelio Lomi, and Rutilio Manetti.
• San Nicola. This medieval church built by 1097, was enlarged between 1297 and 1313 by the Augustinians, perhaps by the design of Giovanni Pisano. The octagonal belfry is from the second half of the 13th century. The paintings include the Madonna with Child by Francesco Traini (14th century) and St. Nicholas Saving Pisa from the Plague (15th century). Noteworthy are also the wood sculptures by Giovanni and Nino Pisano, and the Annunciation by Francesco di Valda…

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