The best time to go to Granollers is during the spring (April to June) or autumn (September to October) when the weather is pleasant and the city hosts various cultural events.During these months, the temperatures are mild, making it ideal for exploring the city's historic centre and enjoying its outdoor cafes without the intense heat of summer. Spring brings events like the Granollers Half Marathon, which draws large crowds, and the city's Fira de l'Ascensió, a traditional trade fair with agricultural exhibits and local products.Autumn is another excellent choice, offering comfortable weather for sightseeing and fewer crowds than the peak summer season. The Festa Major de Granollers, the city's main annual festival, typically takes place in late August or early September, featuring traditional dances, music, and street activities. This period allows visitors to experience local traditions and enjoy the city's relaxed pace.While summer (July and August) can be very warm, it's a good option if you plan to combine your visit with trips to the nearby beaches or the Montseny Natural Park.