Planning for the weather is an important factor for making your trip to Haines Junction a success, especially when you’re splurging. The hottest months are usually July and August with an average temp of 47°F, while the coldest months are January and December with an average of 3°F. The snowiest months in Haines Junction are February, December, April, and March, with each month seeing an average of 24 inches of snowfall.