January in Montreux is the coldest month of the year. In January, the weather in Montreux is typically cold. Average daily high temperature in January is about 2 degrees above zero. On average, Montreux has 12 sunny, 10 partly cloudy, and 9 rainy days in January. The rains are usually light. January as well as February, March, April, and November is considered the most uncomfortable time to visit Montreux.