Taking into account the local weather in Thayne is an important factor for planning your visit, especially if you plan to spend your trip poolside. The hottest months are usually July and August with an average temp of 59°F, while the coldest months are December and January with an average of 19°F. The snowiest months in Thayne are January, February, December, and March, with each month seeing an average of 16 inches of snowfall.