Planning for the weather is a good way to make your trip to Dalvay relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July with an average temp of 63°F, while the coldest months are February and January with an average of 26°F. The snowiest months in Dalvay are February, January, March, and December, with each month seeing an average of 54 inches of snowfall.