Three dry days in the western Alps, eleven degrees apart

Chamonix and Zermatt both show zero millimetres of rain through Wednesday, with highs near 20 degrees. The catch sits in the morning. At 1,600 metres Zermatt started today at 9 degrees while the afternoon climbs to 20 — an eleven-degree swing on the same trail. Pack for both ends. A thin merino base layer under a windproof shell covers the dawn start without cooking you by noon, and beats carrying a midlayer you never unpack.