Friday's showers clear from Zermatt and Chamonix by Saturday. Then it stays dry. In Zermatt, Sunday starts near 1°C and climbs to around 14°C. That is a 13-degree swing between first light and lunch. Start in a warm layer and a windproof shell, then pack the warm layer away once the sun reaches the valley. Shaded north-facing paths can stay frosty well into the morning.
Softshell jackets ↗