Weather is probably a major factor when you plan your trip to Usk, 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 55°F, while the coldest months are December and February with an average of 26°F. The snowiest months in Usk are December, February, January, and March, with each month seeing an average of 15 inches of snowfall.