Planning for the weather is a good way to make your trip to North Hatley relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 63°F, while the coldest months are January and February with an average of 21°F. The snowiest months in North Hatley are December, January, April, and February, with each month seeing an average of 13 inches of snowfall.