Weather can make or break a road trip, so we've gathered some data about year-round temperatures in Colonie to help you plan yours. The hottest months are usually July and August, with an average temperature of 20°C, while the coldest months are January and February, with an average of -2°C. The snowiest months in Colonie are February, March, January and December, with each month seeing an average of 20 cm of snowfall.