Spain is absolutely worth visiting in December 2026, offering a unique blend of festive culture and mild weather. While central and northern Spain (like Madrid and Bilbao) are cold and can be damp, the Mediterranean coast and Andalusia remain very pleasant. Seville and Malaga often see sunny days with temperatures reaching 17°C (63°F). December is the peak of the "Christmas Market" season, with incredible displays in Barcelona’s Gothic Quarter and Madrid’s Plaza Mayor. You can experience the unique tradition of the "Fat Lottery" (El Gordo) on December 22nd and the New Year's Eve grape-eating tradition. For 2026 travelers, the Canary Islands are the "secret weapon" for December, offering actual beach weather with highs of 22°C (72°F). Overall, December provides a cozy, authentic atmosphere with significantly fewer tourists than the summer months, making it a high-value time for a cultural escape.