The Voie d’Arles spans Mediterranean lowlands to the Pyrenees, so conditions vary across its length and elevation. April and September align with milder temperatures, longer daylight than winter, and fewer extremes near the Somport Pass. Outside these windows, weather ranges from hot, exposed plains in mid-summer to colder, wetter spells and occasional high-elevation snow in late autumn and winter, while spring mixes sunny intervals, passing showers, and the possibility of late cold near the mountains.