Other facts from our historical weather data: When is winter in La Martre? The coldest season / winter is in the following months: January, February, March and December. Which is the warmest month in La Martre? July has an average maximum temperature of 20°C (68°F) and is the warmest month of the year. Which is the coldest month in La Martre? The coldest month is January with an average maximum temperature of -7°C (19°F). Which is the wettest month in La Martre? October tops the wettest month list with 120mm (4.7 in) of rainfall. Which is the driest month in La Martre? February is the driest month with 82mm (3.2 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.