Weather can make or break a roadtrip, so here's some data about year-round temperatures in Whiteclay to help you plan yours: The hottest months are usually July and August with an average temp of 72°F, while the coldest months are February and January with an average of 29°F. The snowiest months in Whiteclay are December, April, February, and November, with each month seeing an average of 7 inches of snowfall.