The Camino de Santiago Francés moves from Pyrenean heights through the dry central plateau to Galicia’s Atlantic fringe, so weather shifts noticeably along the way. April, May, and September tend to offer milder walking, with cooler mornings, mixed sunshine and showers, and generally open services. Patterns include spring’s quick changes with lingering wintry bursts on high ground, summer’s strong sun and heat on open plains, and autumn’s brighter spells alternating with passing fronts toward the west.