The Camino Viejo tracks an Atlantic‑influenced start before climbing toward higher, drier valleys on its way inland in changeable weather. May and September often provide a workable mix of mild afternoons, regular dry windows, and manageable heat. Across the year the pattern stays changeable, with spring and early autumn offering longer clear spells, midsummer bringing stronger warmth, and winter turning damp and chilly with occasional wintry touches aloft.