Though weather is just one factor, it can really affect your travel plans, especially when you are planning a longer stay in Whitewater. The hottest months are usually July and August with an average temp of 69°F, while the coldest months are February and January with an average of 21°F. The snowiest months in Whitewater are April, February, March, and November, with each month seeing an average of 6 inches of snowfall.