Regardless of the time you decide to embark on the GR20 hike, be prepared to face a variety of weather conditions. It’s common to experience a diverse range of temperatures within a single day, including thunderstorms, cold, fog, heat, and sunshine. To ensure you’re equipped for any situation, it’s crucial to bring suitable gear and clothing for the season. Keep an eye out for weather alerts and consult with refuge guardians each morning before taking on a new segment of the route.