Planning for the weather is an important factor for making your trip to Les Belleville a success, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 12°C, while the coldest months are January and February, with an average of -4°C. The rainiest months in Les Belleville are December, May, November and January, with each month seeing an average of 182 mm of rainfall.