Weather is probably a major factor when you plan your trip to Collingwood, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January, with an average temperature of 17°C, while the coldest months are July and August, with an average of 12°C. The rainiest months in Collingwood are May, June, August and July, with each month seeing an average of 204 mm of rainfall.