1 The Continentalized Mediterranean climate predominates in Spain's vast table lands (Meseta Central) of the interior.  The oceanic climate (Cfb) is located in the northern part of the country, especially in the regions of Basque Country, Asturias, Cantabria and Galicia.
https://en.wikipedia.org/wiki/Climate_of_Spain
2016 Europe autumn forecast: Warmth to dominate from Spain to Balkans; Storms to grip UK and Ireland. Stormy weather will aim for the United Kingdom while southern Europe can expect a warm and dry autumn. more >.
http://www.accuweather.com/en/es/barcelona/307297/weather-forecast/307297
Summer is the most expensive time in Barcelona, as schools are on vacation, weather is warm and continuous droves of tourists pour into the city, especially in August. Accommodation prices soar during this time, and budget hotels near the beach are nearly impossible to find.
http://traveltips.usatoday.com/time-travel-barcelona-16006.html
Barcelona is Spain’s most modern city, blessed with a mild Mediterranean climate and a colorful array of cultural delights and natural beauty. So it’s little wonder the Catalonian capital has become a year-round tourist destination. The best time to travel to Barcelona depends on visitors’ preferences and priorities.
http://traveltips.usatoday.com/time-travel-barcelona-16006.html
Late spring and early summer tend to boast some of Barcelona’s finest weather, with mild to warm temperatures and frequently sunny skies. Yet, because Barcelona is located downwind of the Pyrenees, cold winds occasionally blow through the area in April, which can be a period of frequent rainfall.
http://traveltips.usatoday.com/time-travel-barcelona-16006.html
The standard mediterranean covers coastal areas (excluding the northern Atlantic coast) the Guadalquivir river basin and the lower reaches of the Tagus and Guadiana basins to the west of the country. The Continentalized Mediterranean climate predominates in Spain's vast table lands (Meseta Central) of the interior.
https://en.wikipedia.org/wiki/Climate_of_Spain
Semiarid climate[edit] The semiarid climate (BSk and BSh in the Köppen climate classification) can be found in south-eastern Spain (covering most of Alicante, Murcia and Almería provinces), and in certain parts of the Ebro Valley.
https://en.wikipedia.org/wiki/Climate_of_Spain
However, the weather in May tends to be warm and clear in Barcelona, minus the humidity weighing down summer months. June is another warm, pleasant month in the Catalonian capital and an ideal time to visit, weather-wise. By the end of June, Mediterranean waters surrounding the city are warm enough for swimming.
http://traveltips.usatoday.com/time-travel-barcelona-16006.html
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https://www.wunderground.com/es/barcelona
The climate of Spain varies across the country. Three main climatic zones (the three main climates) can be distinguished, according to geographical situation and orographic conditions: The Mediterranean climate is characterized by dry and warm summers and cool to mild and wet winters.
https://en.wikipedia.org/wiki/Climate_of_Spain
what's the weather in barcelona spain?
The weather in Barcelona, Spain is mild Mediterranean climate.