Planning for the weather is a good way to make your trip to Haliburton relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 64°F, while the coldest months are January and February with an average of 22°F. The snowiest months in Haliburton are February, January, December, and November, with each month seeing an average of 36 inches of snowfall.