Mountain farming systems that move livestock seasonally, called transhumant pastoralism, are at risk from changing climate. However, many current climate tools are not meaningful to people who rely on transhumance. This study presents a method to create detailed, easy-to-use climate scenarios to help people in regions like the French Basque Pyrenees plan for the future. It combines past and future climate data to group into different climate types, each representing a possible scenario of the future climate. We then summarize key seasonal changes, like how long dry seasons could be or changes in frost occurrence, which are important for local farmers. The approach was developed with input from pastoralists in Soule, France, and helps them understand climate changes and manage uncertainty and show how flexibility in mobility is a strength.