The Camino Primitivo crosses green Atlantic hills and a few exposed passes, with swift shifts between sunshine, cloud, and rain. Based on the seasonal pattern, May, July, and September bring longer days, steadier forecasts, and broad service availability along the route. Outside these windows, conditions vary from occasional heat spikes and summer thunderstorms to more frequent autumn fronts and the damp, short-day stretch of late fall through early spring, when fog, ice, and closures can affect the higher stages and rural segments.