Taking into account the local weather in Collingwood is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually February and January with an average temp of 63°F, while the coldest months are July and August with an average of 53°F. The rainiest months in Collingwood are May, June, August, and July, with each month seeing an average of 8 inches of rainfall.