Continental, dry and windy, with hot summers and severe winters.
The considerable differences in height and the diversified exposure to the sun of the mountain slopes produce a number of very different microclimates between the “plaine” (the valley floor of the Dora Baltea) and the “mountains”. In particular, the “plaine”, oriented east-west, is exceptionally sunny, with scarce rainfall; while the “mountains” have a more pronounced rainfall, due to the height of the watershed ridges, which causes the condensation of the steam carried by the winds coming from the Atlantic Ocean.
The population remedied the water shortages of the “plaine” in the Middle Ages with the construction of numerous artificial canals called “ru”, which still ensure the irrigation of crops. The “mountains”, characterized by marked differences in height, have significant climatic unevenness between the sunny slopes facing south (l ‘”adret”) and those facing north (l’ “envers”).
The “envers”, which is more subject to precipitation, has good snow cover, which allows the practice of winter sports in numerous towns in the region; the presence at altitude of perennial snow also allows, in some areas, the practice of summer skiing.