Winter (December to March). Snow is reliable from mid-December through to the end of March most years, with the school holidays in February the busiest period. Leysin is south-facing, so the sun reaches the pistes early and the village stays warmer than its altitude suggests.
Summer (June to September). The lifts to Berneuse open from late June to mid-September, and this is the best time for hiking, paragliding, and mountain biking. Days are warm but evenings are cool — pack a layer.
Shoulder seasons. April to May and October to early December are quiet — many hotels, restaurants, and lifts close. The advantage is steeply-discounted rooms and the village more or less to yourself.