If you’re looking forward to lots of outings with your partner, check out these details about year-round temperatures in Bois-Colombes: The hottest months are usually August and July with an average temp of 66°F, while the coldest months are January and February with an average of 42°F. The snowiest months in Bois-Colombes are February, March, January, and April, with each month seeing an average of 6 inches of snowfall.