Milan is a fashion and design capital with two major event windows. Milan Fashion Week happens twice a year: February or March (Autumn/Winter collections) and September or October (Spring/Summer collections). The Salone del Mobile design fair in April attracts over 300,000 design professionals and enthusiasts to the Fiera Milano convention center and showrooms across the city. These event weeks fill every hotel room in Milan and prices triple. Book months ahead if attending these events. April and October have pleasant weather (14C to 20C) for visiting the Duomo, Brera district, and the Navigli canal area. May and June are warm and vibrant, 20C to 26C, with long outdoor evenings. July and August are very hot (32C to 36C), and many Milanese leave the city for the lakes and mountains. The Lago di Como and Lago Maggiore are an hour from Milan and far more pleasant in summer heat. December has the Fabbrica del Vapore and city Christmas markets.