Weather will likely play an important role when you plan your trip to Plentywood, 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 67°F, while the coldest months are February and January with an average of 18°F. The snowiest months in Plentywood are February, April, January, and March, with each month seeing an average of 6 inches of snowfall.