Other facts from our historical weather data: When is winter in Baie-Sainte-Catherine? The coldest season / winter is in the following months: January, February, March and December. Which is the warmest month in Baie-Sainte-Catherine? 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 Baie-Sainte-Catherine? The coldest month is January with an average maximum temperature of -7°C (19°F). Which is the wettest month in Baie-Sainte-Catherine? October tops the wettest month list with 130mm (5.1 in) of rainfall. Which is the driest month in Baie-Sainte-Catherine? February is the driest month with 73mm (2.9 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.