Chamonix reads 18.6 degrees this morning with showers already moving through the valley. Tuesday climbs to 28. Wednesday turns hard the other way: around 35 mm of rain forecast for Chamonix, and over on the Zermatt side highs drop to 15 with the freezing level following. A hut walk that feels like high summer on Tuesday will feel like late autumn a day later. Take the shell even if Tuesday tempts you to leave it in the car.
Rain jackets ↗