Weather will likely play an important role when you plan your trip to Vernon, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually July and August with an average temp of 69°F, while the coldest months are January and February with an average of 32°F. The snowiest months in Vernon are February, January, November, and March, with each month seeing an average of 7 inches of snowfall.