Other facts from our historical weather data: Which months have the greatest rainfall in Saint Moritz? Most rainfall (rainy season) is seen in June and July. Which is the warmest month in Saint Moritz? July has an average maximum temperature of 16°C (61°F) and is the warmest month of the year. Which is the coldest month in Saint Moritz? The coldest month is January with an average maximum temperature of -6°C (21°F). Which is the wettest month in Saint Moritz? June tops the wettest month list with 158mm (6.2 in) of rainfall. Which is the driest month in Saint Moritz? February is the driest month with 70mm (2.8 in) of precipitation. Which is the sunniest month in Saint Moritz? July is the sunniest month with an average of 200 hours of sunshine. No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.