July is consistently the hottest month in Tuscany, with average daytime temperatures in 2026 reaching between 30°C and 35°C (86°F–95°F), though heatwaves can frequently push the mercury above 40°C in inland cities like Florence and Siena. August is a close second, often feeling more humid and oppressive. During these months, the Tuscan sun is intense, and many locals flee to the coast or the mountains to escape the heat. If you are visiting in July, it is essential to plan your sightseeing for the early morning or late evening, as the midday heat can make walking through cobblestone streets exhausting. Many shops and smaller museums may also close for a "siesta" during the hottest part of the day. For those who prefer a more manageable climate while still enjoying the summer vibe, June or September offer much milder temperatures with the same iconic golden landscapes.