Les Saisies has a subarctic climate (Köppen climate classificationDfc) closely bordering on a humid continental climate (Dfb). The average annual temperature in Les Saisies is 5.2 °C (41.4 °F). The average annual rainfall is 1,523.1 mm (59.96 in) with May as the wettest month. The temperatures are highest on average in August, at around 13.4 °C (56.1 °F), and lowest in February, at around −2.3 °C (27.9 °F). The highest temperature ever recorded in Les Saisies was 29.6 °C (85.3 °F) on 27 June 2019; the coldest temperature ever recorded was −25.4 °C (−13.7 °F) on 5 February 2012.
Climate data for Les Saisies (Col des Saisies, altitude 1,614 m (5,295 ft), 1991−2020 normals, extremes 1992−present)