Barcelona has lots of blue sky year round, and temperatures are generally pleasant. It sometimes rains in the fall and spring. Late spring and early summer months are the best times to visit, when temperatures are warm, but not stifling. Cities are empty in August, when most Spaniards go on holiday. Spain doubles its population each summer, filling beaches, resort hotels, and restaurants.
Prices rise with the crowds.
The medieval charm of the Barri Gotic will appeal to history lovers. Montjuic, with the Palau Nacional and Castell is a fascinating area to explore. The 1992 Olympic area is also nearby. Barcelona's museums exhibit a fascinating array of art. The Museu Picasso, Museu d'Art Contemporani, and Museu d'Art Modern are just some of the many cultural locales to explore.