Other facts from our historical weather data: Which months have the greatest rainfall in Samnaun? Most rainfall (rainy season) is seen in June, July and August. Which is the warmest month in Samnaun? August has an average maximum temperature of 16°C (61°F) and is the warmest month of the year. Which is the coldest month in Samnaun? The coldest month is January with an average maximum temperature of -5°C (23°F). Which is the wettest month in Samnaun? June tops the wettest month list with 166mm (6.5 in) of rainfall. Which is the driest month in Samnaun? February is the driest month with 92mm (3.6 in) of precipitation. 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.