Weather can make or break a road trip, so here's some data about year-round temperatures in Cavalier to help you plan yours: The hottest months are usually August and July, with an average temperature of 19°C, while the coldest months are February and January, with an average of -10°C. The snowiest months in Cavalier are April, October, December and March, with each month seeing an average of 26 cm of snowfall.