Weather is probably a major factor when you plan your trip to La Riviere, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually August and July with an average temp of 64°F, while the coldest months are February and January with an average of 12°F. The snowiest months in La Riviere are April, November, January, and March, with each month seeing an average of 15 inches of snowfall.